/* ========================================
   EPLUSEM 溢加科技 — 视觉风格系统 V2
   浅色高端版 · 品牌色 #8EE5DF 主导
   Brand Guidelines 2026 Implementation
   ======================================== */

/* ========== CSS Variables 设计令牌 ========== */
:root {
    /* --- 背景色阶 — 浅色高端体系 --- */
    --bg-base: #F0FAFA;          /* 浅底 — 品牌手册主背景色 (50%) */
    --bg-deep: #E7F9F7;          /* 舒缓青 100 — 略深层次 */
    --bg-surface: #F8FFFE;       /* 中性 50 — 最浅白色面 */
    --bg-elevated: #FFFFFF;      /* 纯白卡片底 */
    --bg-card: rgba(255, 255, 255, 0.88);     /* 白色磨砂玻璃 */
    --bg-card-hover: #FFFFFF;                 /* 悬浮用不透明白，避免发灰 */
    --bg-glass: rgba(255, 255, 255, 0.65);    /* 白色玻璃态 */
    --bg-brand-tint: rgba(142, 229, 223, 0.08); /* 品牌色微染 */

    /* 品牌主色 — 品牌手册 PRIMARY & SUPPORTING COLOR ROLES */
    --color-primary: #8EE5DF;    /* 舒缓青 — 主品牌色 (22%) */
    --color-primary-dim: rgba(142, 229, 223, 0.15);
    --color-signal: #01FEEF;     /* 电光青 — 即时智能信号 (5%) */
    --color-signal-dim: rgba(1, 254, 239, 0.12);
    --color-connect: #94E5F3;    /* 智能蓝 — 连接与空间延展 (5%) */
    --color-connect-dim: rgba(148, 229, 243, 0.12);
    --color-depth: #132B2D;      /* 深青 — 深层结构 */
    --color-text-dark: #081518;  /* 黑钛灰 — 主要文字 */
    --color-gold: #AA9366;       /* 金色 — 品牌背书 (3%) */
    --color-gold-dim: rgba(170, 147, 102, 0.15);
    --color-accent: #FF494F;     /* 红色 — 关键强调色 */
    --color-accent-dim: rgba(255, 73, 79, 0.10);

    /* 品牌色阶 (Primary Scale 50-900) */
    --color-cyan-50: #F3FCFB;
    --color-cyan-100: #E7F9F7;
    --color-cyan-200: #D1F5F2;
    --color-cyan-300: #B8EEE9;
    --color-cyan-400: #A2EAE4;
    --color-cyan-500: #8EE5DF;   /* 主品牌色 */
    --color-cyan-600: #6FC9C6;
    --color-cyan-700: #4AA5A5;
    --color-cyan-800: #247F83;
    --color-cyan-900: #006B74;

    /* 中性色 (Neutrals) */
    --color-neutral-50: #F8FFFE;
    --color-neutral-100: #F0FAFA;
    --color-neutral-200: #D8ECEC;
    --color-neutral-500: #536B70;
    --color-white: #FFFFFF;

    /* 渐变统一：由深至浅，结尾落在中青，避免过浅突兀 */
    --gradient-primary: linear-gradient(90deg, #006B74 0%, #247F83 45%, #4AA5A5 100%);
    --gradient-depth: linear-gradient(90deg, #006B74 0%, #4AA5A5 100%);
    --gradient-mist: linear-gradient(90deg, #4AA5A5 0%, #E7F9F7 100%);
    --gradient-brand-1: linear-gradient(90deg, #247F83 0%, #6FC9C6 100%);
    --gradient-brand-2: linear-gradient(90deg, #006B74 0%, #4AA5A5 100%);
    --gradient-text: linear-gradient(90deg, #006B74 0%, #4AA5A5 100%);
    --gradient-border: linear-gradient(90deg, rgba(0,107,116,0.35) 0%, rgba(74,165,165,0.32) 100%);

    /* 文字色阶 — 深色文字体系 */
    --text-primary: #081518;          /* 黑钛灰 — 主文字 */
    --text-secondary: rgba(8, 21, 24, 0.68);  /* 次要文字 */
    --text-tertiary: rgba(8, 21, 24, 0.45);   /* 辅助文字 */
    --text-quaternary: rgba(8, 21, 24, 0.25);  /* 弱化文字 */
    --text-brand: #006B74;             /* 深青品牌文字 */
    --text-on-primary: #FFFFFF;        /* 品牌色背景上的白字 */

    /* 边框 — 浅色系 */
    --border-subtle: rgba(8, 21, 24, 0.06);
    --border-default: rgba(8, 21, 24, 0.10);
    --border-strong: rgba(8, 21, 24, 0.16);
    --border-brand: rgba(142, 229, 223, 0.35);
    --border-brand-strong: rgba(142, 229, 223, 0.5);

    /* --- 字体排版 --- */
    --font-sans: "MiSans", "Noto Sans SC", "OPPO Sans", "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    --font-display: "MiSans", "Inter", -apple-system, sans-serif;

    /* 字号阶梯 */
    --text-xs: 0.75rem;
    --text-sm: 0.875rem;
    --text-base: 1rem;
    --text-lg: 1.125rem;
    --text-xl: 1.25rem;
    --text-2xl: 1.5rem;
    --text-3xl: 1.875rem;
    --text-4xl: 2.25rem;
    --text-5xl: 3rem;
    --text-6xl: 3.75rem;
    --text-7xl: 4.5rem;
    --text-8xl: 6rem;

    /* 字重 */
    --weight-thin: 100;
    --weight-light: 300;
    --weight-regular: 400;
    --weight-medium: 500;
    --weight-semibold: 600;
    --weight-bold: 700;
    --weight-heavy: 800;
    --weight-black: 900;

    /* 行高 */
    --leading-tight: 1.15;
    --leading-snug: 1.3;
    --leading-normal: 1.5;
    --leading-relaxed: 1.7;
    --leading-loose: 2;

    /* 字间距 */
    --tracking-tight: -0.02em;
    --tracking-normal: 0;
    --tracking-wide: 0.02em;
    --tracking-wider: 0.05em;
    --tracking-widest: 0.1em;

    /* --- 间距系统 (8px grid) --- */
    --space-1: 4px;
    --space-2: 8px;
    --space-3: 12px;
    --space-4: 16px;
    --space-5: 20px;
    --space-6: 24px;
    --space-8: 32px;
    --space-10: 40px;
    --space-12: 48px;
    --space-16: 64px;
    --space-20: 80px;
    --space-24: 96px;
    --space-32: 128px;

    /* --- 圆角 --- */
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --radius-2xl: 32px;
    --radius-full: 9999px;

    /* --- 阴影 — 高端柔和阴影 --- */
    --shadow-sm: 0 2px 12px rgba(8, 21, 24, 0.04);
    --shadow-md: 0 4px 24px rgba(8, 21, 24, 0.06);
    --shadow-lg: 0 8px 40px rgba(8, 21, 24, 0.08);
    --shadow-xl: 0 16px 64px rgba(8, 21, 24, 0.10);
    --shadow-glow-primary: 0 8px 40px rgba(142, 229, 223, 0.25);
    --shadow-glow-signal: 0 8px 40px rgba(1, 254, 239, 0.20);
    --shadow-card: 0 1px 3px rgba(8, 21, 24, 0.03), 0 8px 28px rgba(142, 229, 223, 0.10);
    --shadow-card-hover: 0 12px 36px rgba(142, 229, 223, 0.22), 0 4px 16px rgba(8, 21, 24, 0.04);

    /* --- 过渡 --- */
    --transition-fast: 0.15s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-bounce: 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);

    /* --- 布局 --- */
    --container-max: 1280px;
    --container-padding: 24px;
    --navbar-height: 72px;
}

/* ========== Reset ========== */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    scroll-padding-top: var(--navbar-height);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
    max-width: 100%;
}

body {
    font-family: var(--font-sans);
    background: var(--bg-base);
    color: var(--text-primary);
    line-height: var(--leading-normal);
    overflow-x: hidden;
    max-width: 100%;
    width: 100%;
    position: relative;
    overscroll-behavior-x: none;
}

/* 全局背景纹理层 — 品牌色 #8EE5DF 基调 + 纹理叠加 */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background:
        radial-gradient(ellipse at 20% 0%, rgba(142, 229, 223, 0.15) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 100%, rgba(148, 229, 243, 0.12) 0%, transparent 50%),
        radial-gradient(ellipse at 50% 50%, rgba(142, 229, 223, 0.05) 0%, transparent 70%),
        linear-gradient(180deg, #F0FAFA 0%, #E7F9F7 50%, #F0FAFA 100%);
    z-index: -2;
}

/* 全局品牌纹理叠加 */
body::after {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: url('../images/bg/body-texture.png');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    opacity: 0.15;
    mix-blend-mode: multiply;
    z-index: -1;
    pointer-events: none;
}

a {
    color: inherit;
    text-decoration: none;
    transition: color var(--transition-base);
}

button {
    font-family: inherit;
    cursor: pointer;
    border: none;
    background: none;
    color: inherit;
}

img, svg {
    display: block;
    max-width: 100%;
}

::selection {
    background: rgba(142, 229, 223, 0.35);
    color: var(--text-primary);
}

::-webkit-scrollbar {
    width: 6px;
}
::-webkit-scrollbar-track {
    background: var(--bg-deep);
}
::-webkit-scrollbar-thumb {
    background: rgba(142, 229, 223, 0.4);
    border-radius: 3px;
}
::-webkit-scrollbar-thumb:hover {
    background: rgba(142, 229, 223, 0.6);
}

/* ========== 粒子背景 ========== */
#particleCanvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    pointer-events: none;
    opacity: 0.18;
}

/* ========== 容器 ========== */
.container {
    max-width: var(--container-max);
    width: 100%;
    margin: 0 auto;
    padding: 0 var(--container-padding);
    position: relative;
    z-index: 1;
    box-sizing: border-box;
}

/* ========== 文字渐变 ========== */
.text-gradient {
    background: var(--gradient-text);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    filter: drop-shadow(0 4px 20px rgba(142, 229, 223, 0.4));
}

/* ========== 按钮 ========== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 24px;
    font-size: var(--text-sm);
    font-weight: var(--weight-semibold);
    border-radius: var(--radius-full);
    transition: all var(--transition-base);
    cursor: pointer;
    white-space: nowrap;
    letter-spacing: var(--tracking-wide);
}

.btn-primary {
    background: var(--gradient-depth);
    color: var(--text-on-primary);
    box-shadow: 0 4px 20px rgba(142, 229, 223, 0.4);
}
.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(1, 254, 239, 0.4);
}

.btn-outline {
    background: rgba(255, 255, 255, 0.6);
    color: var(--text-primary);
    border: 1px solid var(--border-default);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}
.btn-outline:hover {
    border-color: var(--color-cyan-600);
    color: var(--text-brand);
    background: rgba(142, 229, 223, 0.12);
}

.btn-ghost {
    color: var(--text-secondary);
    padding: 10px 16px;
}
.btn-ghost:hover {
    color: var(--text-brand);
}

.btn-dark {
    background: var(--color-depth);
    color: #FFFFFF;
    box-shadow: 0 4px 16px rgba(19, 43, 45, 0.2);
}
.btn-dark:hover {
    background: #1a3a3d;
    transform: translateY(-1px);
    box-shadow: 0 6px 20px rgba(19, 43, 45, 0.28);
}

.btn-lg {
    padding: 14px 32px;
    font-size: var(--text-base);
}

/* ========== 导航栏 ========== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    width: 100%;
    max-width: 100%;
    height: var(--navbar-height);
    z-index: 100;
    background: rgba(255, 255, 255, 0.75);
    backdrop-filter: blur(24px) saturate(180%);
    -webkit-backdrop-filter: blur(24px) saturate(180%);
    border-bottom: 1px solid var(--border-subtle);
    transition: all var(--transition-base);
}

.navbar.scrolled {
    background: rgba(255, 255, 255, 0.92);
    border-bottom-color: var(--border-default);
    box-shadow: 0 4px 30px rgba(8, 21, 24, 0.06);
}

.nav-container {
    max-width: var(--container-max);
    height: 100%;
    margin: 0 auto;
    padding: 0 var(--container-padding);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 32px;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-shrink: 0;
}

.nav-logo-img {
    height: 36px;
    width: auto;
    display: block;
    filter: drop-shadow(0 2px 8px rgba(142, 229, 223, 0.4));
    transition: transform 0.3s ease;
}

.nav-logo:hover .nav-logo-img {
    transform: scale(1.05);
}

.nav-logo .logo-mark {
    width: 36px;
    height: auto;
    color: var(--color-cyan-700);
    filter: drop-shadow(0 2px 8px rgba(142, 229, 223, 0.4));
}

.logo-text {
    font-size: var(--text-lg);
    font-weight: var(--weight-bold);
    letter-spacing: var(--tracking-wide);
    color: var(--text-primary);
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 4px;
    flex: 1;
    justify-content: center;
}

.nav-link {
    padding: 8px 14px;
    font-size: var(--text-sm);
    font-weight: var(--weight-medium);
    color: var(--text-secondary);
    border-radius: var(--radius-md);
    transition: all var(--transition-base);
    position: relative;
}

.nav-link:hover {
    color: var(--text-primary);
    background: var(--bg-brand-tint);
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: 12px;
    flex-shrink: 0;
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 4px;
    padding: 8px;
}

.nav-toggle span {
    width: 20px;
    height: 2px;
    background: var(--text-primary);
    border-radius: 1px;
    transition: all var(--transition-base);
}

.nav-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(4px, 4px);
}
.nav-toggle.active span:nth-child(2) {
    opacity: 0;
}
.nav-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(4px, -4px);
}

/* ========== 产品矩阵下拉 Mega Menu ========== */
.nav-item-dropdown {
    position: relative;
}

.nav-dropdown-trigger {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    border: none;
    background: transparent;
    cursor: pointer;
    font-family: inherit;
}

.nav-dropdown-chevron {
    transition: transform var(--transition-fast);
    opacity: 0.7;
}

.nav-item-dropdown.open .nav-dropdown-trigger,
.nav-dropdown-trigger[aria-expanded="true"] {
    color: var(--text-brand);
    background: rgba(142, 229, 223, 0.22);
}

.nav-item-dropdown.open .nav-dropdown-chevron,
.nav-dropdown-trigger[aria-expanded="true"] .nav-dropdown-chevron {
    transform: rotate(180deg);
    opacity: 1;
}

.nav-mega-menu {
    position: absolute;
    top: calc(100% + 14px);
    left: 0;
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    gap: 8px 28px;
    min-width: 860px;
    padding: 28px 32px;
    background: #FFFFFF;
    border: 1px solid var(--border-subtle);
    border-radius: 20px;
    box-shadow: 0 12px 48px rgba(8, 21, 24, 0.10), 0 2px 8px rgba(8, 21, 24, 0.04);
    opacity: 0;
    visibility: hidden;
    transform: translateY(8px);
    transition: opacity 0.2s ease, transform 0.2s ease, visibility 0.2s;
    z-index: 200;
    pointer-events: none;
}

.nav-mega-menu::before {
    content: '';
    position: absolute;
    top: -14px;
    left: 0;
    right: 0;
    height: 14px;
}

.nav-item-dropdown.open .nav-mega-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
    pointer-events: auto;
}

.nav-mega-menu[hidden] {
    display: none !important;
}

.mega-col {
    display: flex;
    flex-direction: column;
    gap: 4px;
    min-width: 0;
}

.mega-col-title,
.mega-col-heading {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 12px;
    font-weight: var(--weight-medium);
    color: var(--text-tertiary);
    letter-spacing: 0.02em;
    padding: 0 10px 12px;
    margin-bottom: 4px;
    text-decoration: none;
    transition: color var(--transition-fast);
}

.mega-col-icon {
    width: 16px;
    height: 16px;
    object-fit: contain;
    flex-shrink: 0;
}

.mega-col-label {
    min-width: 0;
}

.mega-col-title:hover {
    color: var(--text-brand);
}

.mega-col-title .mega-col-label > span,
.mega-col-heading .mega-col-label > span {
    font-weight: var(--weight-regular);
    letter-spacing: 0.06em;
    text-transform: uppercase;
    opacity: 0.85;
}

.mega-product {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 10px;
    border-radius: 14px;
    text-decoration: none;
    color: inherit;
    transition: background var(--transition-fast);
}

.mega-product:hover {
    background: rgba(142, 229, 223, 0.12);
}

.mega-product-more {
    cursor: default;
    opacity: 0.72;
}

.mega-product-more:hover {
    background: transparent;
}

.mega-product-thumb {
    width: 52px;
    height: 52px;
    border-radius: 12px;
    overflow: hidden;
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 5px;
    background: linear-gradient(145deg, #E7F9F7 0%, #D1F5F2 100%);
}

.mega-product-thumb img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    object-position: center;
    display: block;
}

.mega-product-thumb-more {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0;
    background: transparent;
    border: 1.5px dashed rgba(8, 21, 24, 0.18);
    color: var(--text-tertiary);
    font-size: 22px;
    font-weight: 300;
    line-height: 1;
}

.mega-product-info {
    min-width: 0;
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.mega-product-name {
    font-size: 14px;
    font-weight: var(--weight-semibold);
    color: var(--text-primary);
    line-height: 1.3;
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 6px;
}

.mega-product-desc {
    font-size: 12px;
    color: var(--text-tertiary);
    line-height: 1.4;
}

.mega-badge {
    display: inline-flex;
    align-items: center;
    padding: 2px 7px;
    font-size: 10px;
    font-weight: var(--weight-medium);
    color: var(--color-cyan-800);
    background: linear-gradient(90deg, rgba(0, 107, 116, 0.14) 0%, rgba(142, 229, 223, 0.22) 100%);
    border: 1px solid rgba(1, 254, 239, 0.35);
    border-radius: 999px;
    line-height: 1.4;
    white-space: nowrap;
}

/* ========== Hero 首屏 — 左右分栏布局 ========== */
.hero {
    min-height: 100vh;
    min-height: 100dvh;
    display: flex;
    align-items: center;
    position: relative;
    overflow: hidden;
    max-width: 100%;
    padding: calc(var(--navbar-height) + 48px) 24px 72px;
    box-sizing: border-box;
    background:
        radial-gradient(ellipse 80% 60% at 50% 40%, rgba(142, 229, 223, 0.10) 0%, transparent 70%),
        linear-gradient(180deg, #F5FBFA 0%, #F2F8F8 100%);
}

/* Hero：纸感纹理均匀铺底 */
.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: url('../images/bg/hero-paper.png');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    opacity: 0.22;
    mix-blend-mode: multiply;
    z-index: 0;
}

/* 不再做单侧色块，避免左右失衡 */
.hero-bg-glow {
    display: none;
}

.hero-wrap {
    position: relative;
    z-index: 2;
    display: grid;
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    align-items: center;
    gap: 40px 48px;
    width: 100%;
    max-width: 1280px;
    margin: 0 auto;
}

/* 左侧文字 */
.hero-left {
    max-width: 560px;
}

.hero-brand-tag {
    font-family: var(--font-display);
    font-size: 13px;
    font-weight: 700;
    letter-spacing: 0.28em;
    color: var(--color-cyan-700);
    margin-bottom: 28px;
    text-transform: uppercase;
}

.hero-title {
    font-size: clamp(2.6rem, 5.6vw, 4.6rem);
    font-weight: var(--weight-heavy);
    line-height: 1.08;
    letter-spacing: -0.02em;
    margin-bottom: 22px;
    color: var(--text-primary);
}

.hero-title .title-line {
    display: block;
}

.hero-title .title-line-1 {
    font-size: 0.52em;
    line-height: 1.25;
    color: #111827;
    font-weight: var(--weight-bold);
    letter-spacing: 0.02em;
}

.hero-title .title-line-2 {
    font-size: 1em;
    color: var(--color-cyan-700);
    font-weight: var(--weight-heavy);
}

.hero-title em {
    font-style: normal;
    color: var(--color-cyan-700);
}

.hero-subtitle-en {
    font-size: 12px;
    font-weight: var(--weight-medium);
    color: rgba(74, 165, 165, 0.85);
    letter-spacing: 0.26em;
    margin-bottom: 24px;
    font-family: var(--font-display);
    text-transform: uppercase;
}

.hero-desc {
    font-size: var(--text-base);
    line-height: 1.85;
    color: var(--text-secondary);
    margin-bottom: 40px;
    max-width: 460px;
}

.hero-cta {
    display: flex;
    gap: 14px;
    flex-wrap: wrap;
}

.hero-cta .btn-outline {
    background: rgba(255, 255, 255, 0.78);
    border-color: rgba(8, 21, 24, 0.08);
    box-shadow: 0 8px 24px rgba(8, 21, 24, 0.04);
}

.hero-cta .btn-primary {
    box-shadow: 0 10px 28px rgba(0, 107, 116, 0.22);
}

/* 右侧 Logo：嵌在波纹里，柔阴影而非霓虹光 */
.hero-right {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    height: 100%;
    min-height: 520px;
}

.hero-logo-mask {
    position: relative;
    width: 100%;
    max-width: 560px;
    aspect-ratio: 1 / 1;
    display: flex;
    align-items: center;
    justify-content: center;
    filter: drop-shadow(0 28px 48px rgba(20, 40, 44, 0.14));
}

.hero-logo-img {
    width: 92%;
    height: 92%;
    object-fit: contain;
    filter: drop-shadow(0 18px 28px rgba(8, 21, 24, 0.12));
    animation: heroLogoFloat 10s ease-in-out infinite;
}

@keyframes heroLogoFloat {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}

.hero-right::before,
.hero-right::after {
    display: none;
}

/* 响应式 */
@media (max-width: 980px) {
    .hero-wrap {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    .hero-left { max-width: 100%; text-align: left; }
    .hero-right { min-height: 420px; }
    .hero-logo-mask { max-width: 420px; }
}

@media (max-width: 640px) {
    .hero { padding: 100px 16px 60px; min-height: 100svh; }
    .hero-title { font-size: 2.5rem; }
    .hero-brand-tag,
    .hero-subtitle-en {
        letter-spacing: 0.14em;
        word-break: break-word;
    }
    .hero-cta { flex-direction: column; align-items: stretch; }
    .hero-cta .btn { justify-content: center; }
    .hero-right { min-height: 320px; }
    .hero-logo-mask { max-width: 320px; }
    .evia-human-bg {
        right: 0;
        width: min(70vw, 320px);
    }
    .evia-glow,
    .footer-glow,
    .hero-bg-glow {
        width: min(100%, 360px);
        max-width: 100%;
    }
}

/* 滚动指示器 */
.scroll-indicator {
    position: absolute;
    bottom: 28px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    z-index: 2;
}

.scroll-line {
    width: 1px;
    height: 32px;
    background: linear-gradient(to bottom, transparent, var(--color-cyan-600));
    animation: scroll-line-anim 2s ease-in-out infinite;
}

@keyframes scroll-line-anim {
    0% { transform: scaleY(0); transform-origin: top; }
    50% { transform: scaleY(1); transform-origin: top; }
    51% { transform: scaleY(1); transform-origin: bottom; }
    100% { transform: scaleY(0); transform-origin: bottom; }
}

.scroll-text {
    font-size: 10px;
    letter-spacing: var(--tracking-widest);
    color: var(--text-quaternary);
}

/* ========== 通用 Section ========== */
.section {
    padding: var(--space-32) 0;
    position: relative;
    z-index: 1;
    overflow-x: clip;
    max-width: 100%;
}

.section-header {
    text-align: center;
    max-width: 800px;
    margin: 0 auto var(--space-20);
}

.section-tag {
    display: inline-block;
    font-size: var(--text-xs);
    font-weight: var(--weight-semibold);
    letter-spacing: var(--tracking-widest);
    color: var(--text-brand);
    margin-bottom: 16px;
    padding: 4px 16px;
    background: var(--color-primary-dim);
    border-radius: var(--radius-full);
    border: 1px solid var(--border-brand);
}

.section-title {
    font-size: clamp(1.8rem, 4vw, 3rem);
    font-weight: var(--weight-bold);
    line-height: var(--leading-tight);
    margin-bottom: 16px;
    letter-spacing: var(--tracking-tight);
    color: var(--text-primary);
}

.section-desc {
    font-size: var(--text-lg);
    line-height: var(--leading-relaxed);
    color: var(--text-secondary);
}

/* ========== 品牌哲学 ========== */
.philosophy-steps {
    display: flex;
    align-items: stretch;
    justify-content: center;
    gap: 0;
    margin-bottom: var(--space-16);
    flex-wrap: wrap;
}

.step-card {
    flex: 1;
    min-width: 200px;
    max-width: 280px;
    padding: 32px 24px;
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-xl);
    text-align: center;
    transition: all var(--transition-base);
    position: relative;
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    box-shadow: var(--shadow-card);
}

.step-card:hover {
    background: var(--bg-card-hover);
    border-color: var(--border-brand);
    transform: translateY(-8px);
    box-shadow: var(--shadow-card-hover);
}

.step-number {
    position: absolute;
    top: 16px;
    right: 20px;
    font-size: var(--text-3xl);
    font-weight: var(--weight-heavy);
    color: var(--text-quaternary);
    line-height: 1;
}

.step-icon {
    width: 56px;
    height: 56px;
    margin: 0 auto 20px;
    color: var(--color-cyan-600);
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: transform var(--transition-base), box-shadow var(--transition-base), background var(--transition-base);
}

.step-icon img,
.product-icon img,
.highlight-icon img,
.feature-icon img,
.vision-card-icon img,
.notif-icon img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    display: block;
}

.notif-icon img {
    width: 20px;
    height: 20px;
}

.step-card:nth-child(3) .step-icon { color: var(--color-cyan-600); }
.step-card:nth-child(5) .step-icon { color: var(--color-cyan-600); }
.step-card:nth-child(7) .step-icon { color: var(--color-cyan-600); }

.step-card:hover .step-icon {
    transform: scale(1.06);
    background: rgba(142, 229, 223, 0.10);
    box-shadow: 0 4px 14px rgba(142, 229, 223, 0.28);
}

.step-card:hover .step-icon img {
    filter: none;
}

.step-name {
    font-size: var(--text-xl);
    font-weight: var(--weight-bold);
    margin-bottom: 12px;
    color: var(--text-primary);
}

.step-name span {
    display: block;
    font-size: var(--text-xs);
    font-weight: var(--weight-medium);
    color: var(--text-tertiary);
    letter-spacing: var(--tracking-wider);
    margin-top: 4px;
}

.step-desc {
    font-size: var(--text-sm);
    line-height: var(--leading-relaxed);
    color: var(--text-secondary);
}

.step-connector {
    display: flex;
    align-items: center;
    padding: 0 8px;
    color: var(--border-default);
    min-width: 40px;
}

.philosophy-quote {
    text-align: center;
    font-size: var(--text-2xl);
    font-weight: var(--weight-light);
    color: var(--text-secondary);
    letter-spacing: var(--tracking-wide);
}

.philosophy-quote em {
    font-style: italic;
    font-weight: var(--weight-medium);
    background: var(--gradient-depth);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.philosophy-human {
    display: inline-block;
    margin-top: 12px;
    font-size: var(--text-base);
    color: var(--text-tertiary);
    letter-spacing: var(--tracking-wide);
}

/* ========== 数据基础设施 ========== */
.infra-grid {
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    gap: 32px;
    align-items: start;
}

.infra-column-header {
    margin-bottom: 24px;
}

.infra-badge {
    display: inline-block;
    font-size: var(--text-xs);
    font-weight: var(--weight-bold);
    letter-spacing: var(--tracking-wider);
    padding: 4px 14px;
    border-radius: var(--radius-full);
    margin-bottom: 16px;
}

.infra-badge-public {
    background: var(--color-primary-dim);
    color: var(--text-brand);
    border: 1px solid var(--border-brand);
}

.infra-badge-local {
    background: var(--color-connect-dim);
    color: var(--color-cyan-800);
    border: 1px solid rgba(148, 229, 243, 0.3);
}

.infra-column-header h3 {
    font-size: var(--text-xl);
    font-weight: var(--weight-bold);
    margin-bottom: 8px;
    color: var(--text-primary);
}

.infra-column-header p {
    font-size: var(--text-sm);
    color: var(--text-secondary);
    line-height: var(--leading-relaxed);
}

.product-card {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 18px;
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    margin-bottom: 12px;
    transition: all var(--transition-base);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    box-shadow: var(--shadow-sm);
}

.product-card:hover {
    background: var(--bg-card-hover);
    border-color: var(--border-brand);
    transform: translateX(4px);
    box-shadow: var(--shadow-card-hover);
}

.product-icon {
    width: 48px;
    height: 48px;
    flex-shrink: 0;
    color: var(--color-cyan-600);
}

.infra-column:last-child .product-icon {
    color: var(--color-cyan-800);
}

.product-info {
    flex: 1;
    min-width: 0;
}

.product-name {
    font-size: var(--text-base);
    font-weight: var(--weight-semibold);
    margin-bottom: 6px;
    color: var(--text-primary);
}

.product-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}

.tag {
    font-size: 11px;
    padding: 2px 10px;
    background: rgba(255, 255, 255, 0.6);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-full);
    color: var(--text-tertiary);
    white-space: nowrap;
}

.tag-primary { color: var(--text-brand); border-color: var(--border-brand); background: var(--color-primary-dim); }
.tag-connect { color: var(--color-cyan-800); border-color: rgba(148, 229, 243, 0.3); background: var(--color-connect-dim); }
.tag-signal { color: var(--color-cyan-900); border-color: rgba(1, 254, 239, 0.25); background: rgba(1, 254, 239, 0.08); }

.product-status {
    font-size: 10px;
    font-weight: var(--weight-bold);
    padding: 4px 10px;
    border-radius: var(--radius-full);
    letter-spacing: var(--tracking-wide);
    white-space: nowrap;
    flex-shrink: 0;
}

.status-active {
    background: rgba(1, 254, 239, 0.10);
    color: var(--color-cyan-800);
    border: 1px solid rgba(1, 254, 239, 0.3);
}

.status-dev {
    background: linear-gradient(90deg, rgba(0, 107, 116, 0.14) 0%, rgba(142, 229, 223, 0.22) 100%);
    color: var(--color-cyan-800);
    border: 1px solid rgba(1, 254, 239, 0.35);
}

/* 融合中心 */
.infra-merge {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 24px;
    min-height: 400px;
}

.merge-circle {
    position: relative;
    width: 200px;
    height: 200px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 24px;
}

.merge-core {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.92);
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    border: 2px solid rgba(142, 229, 223, 0.55);
    box-shadow: 0 8px 30px rgba(142, 229, 223, 0.4);
    z-index: 2;
    animation: merge-core-pulse 3s ease-in-out infinite;
}

@keyframes merge-core-pulse {
    0%, 100% { box-shadow: 0 8px 30px rgba(142, 229, 223, 0.4); }
    50% { box-shadow: 0 8px 50px rgba(1, 254, 239, 0.4); }
}

.merge-avatar {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    border-radius: 50%;
}

.merge-ring {
    position: absolute;
    border-radius: 50%;
    border: 1px solid var(--border-brand);
}

.merge-ring-1 {
    width: 120px;
    height: 120px;
    border-color: rgba(142, 229, 223, 0.4);
    animation: ring-rotate 10s linear infinite;
}

.merge-ring-2 {
    width: 160px;
    height: 160px;
    border-color: rgba(148, 229, 243, 0.3);
    border-style: dashed;
    animation: ring-rotate 15s linear infinite reverse;
}

.merge-ring-3 {
    width: 200px;
    height: 200px;
    border-color: rgba(1, 254, 239, 0.2);
    animation: ring-rotate 20s linear infinite;
}

@keyframes ring-rotate {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

.merge-text {
    text-align: center;
    font-size: var(--text-sm);
    line-height: var(--leading-relaxed);
    color: var(--text-secondary);
}

.merge-text strong {
    background: var(--gradient-depth);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-weight: var(--weight-bold);
}

/* ========== 五环闭环 — 毛玻璃一体版 ========== */
.closedloop {
    position: relative;
}

.loop-hud {
    position: relative;
    margin-bottom: var(--space-8);
}

.loop-hud-frame {
    position: relative;
    overflow: hidden;
    border-radius: var(--radius-2xl);
    padding: 28px 24px 24px;
    color: var(--text-primary);
    background:
        radial-gradient(ellipse at 20% 0%, rgba(142, 229, 223, 0.22) 0%, transparent 45%),
        radial-gradient(ellipse at 90% 100%, rgba(1, 254, 239, 0.1) 0%, transparent 50%),
        rgba(255, 255, 255, 0.52);
    border: 1px solid rgba(142, 229, 223, 0.32);
    box-shadow: var(--shadow-card);
    backdrop-filter: blur(22px) saturate(160%);
    -webkit-backdrop-filter: blur(22px) saturate(160%);
}

.loop-hud-frame::before {
    content: '';
    position: absolute;
    inset: 0;
    background:
        radial-gradient(ellipse at 30% 20%, rgba(142, 229, 223, 0.12) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 80%, rgba(1, 254, 239, 0.06) 0%, transparent 45%);
    pointer-events: none;
    z-index: 0;
}

.loop-hud-frame::after {
    content: '';
    position: absolute;
    left: 0;
    right: 0;
    height: 18%;
    background: linear-gradient(180deg, transparent, rgba(142, 229, 223, 0.07), transparent);
    animation: loop-hud-scan 7s linear infinite;
    pointer-events: none;
    z-index: 0;
}

@keyframes loop-hud-scan {
    0% { top: -25%; }
    100% { top: 110%; }
}

.loop-hud-bar {
    position: relative;
    z-index: 2;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    flex-wrap: wrap;
    margin-bottom: 24px;
    padding: 0 2px 16px;
    border-bottom: 1px solid rgba(142, 229, 223, 0.22);
}

.loop-hud-status {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    font-weight: 600;
    color: var(--color-cyan-800);
}

.loop-hud-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--color-cyan-600);
    box-shadow: 0 0 0 4px rgba(142, 229, 223, 0.2);
}

.loop-hud-meta {
    font-size: 13px;
    color: var(--text-secondary);
    font-weight: 500;
}

.loop-hud-meta-signal {
    color: var(--color-cyan-800);
}

.loop-hud-body {
    position: relative;
    z-index: 2;
    display: grid;
    grid-template-columns: minmax(280px, 0.95fr) minmax(0, 1.05fr);
    gap: 28px;
    align-items: center;
}

.loop-radar {
    --orbit-size: min(380px, 78vw);
    --orbit-radius: calc(var(--orbit-size) * 0.36);
    position: relative;
    width: var(--orbit-size);
    height: var(--orbit-size);
    margin: 0 auto;
}

.loop-radar-ring {
    position: absolute;
    inset: 18%;
    border-radius: 50%;
    border: 1px solid rgba(74, 165, 165, 0.42);
    background: rgba(255, 255, 255, 0.18);
    pointer-events: none;
    z-index: 0;
}

.loop-radar-ring-2 {
    inset: 8%;
    background: transparent;
    border-style: dashed;
    border-color: rgba(0, 107, 116, 0.28);
    animation: loop-radar-spin 32s linear infinite;
}

.loop-radar-ring-3 {
    inset: 0;
    background: transparent;
    border-color: rgba(142, 229, 223, 0.32);
    box-shadow: 0 0 0 1px rgba(255, 255, 255, 0.25) inset;
}

@keyframes loop-radar-spin {
    to { transform: rotate(360deg); }
}

.loop-radar-sweep {
    position: absolute;
    inset: 8%;
    border-radius: 50%;
    background: conic-gradient(from 0deg, transparent 0deg, rgba(142, 229, 223, 0.18) 40deg, transparent 75deg);
    animation: loop-radar-spin 5.5s linear infinite;
    pointer-events: none;
    z-index: 0;
    opacity: 0.7;
}

.loop-links {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
    pointer-events: none;
    overflow: visible;
}

.loop-link-ring {
    fill: none;
    stroke: rgba(111, 201, 198, 0.35);
    stroke-width: 0.65;
    stroke-linejoin: round;
    stroke-linecap: round;
    transition: stroke 0.4s ease, opacity 0.4s ease;
}

.loop-radar.is-linked .loop-link-ring {
    stroke: rgba(111, 201, 198, 0.22);
}

.loop-focus-arc {
    fill: none;
    stroke: rgba(0, 107, 116, 0.7);
    stroke-width: 2.2;
    stroke-linecap: round;
    stroke-dasharray: 12 88;
    stroke-dashoffset: 6;
    opacity: 0;
    transform-box: view-box;
    transform-origin: 50px 50px;
    transition:
        opacity 0.4s ease,
        transform 0.55s cubic-bezier(0.22, 1, 0.36, 1),
        stroke 0.4s ease;
}

.loop-radar.is-linked .loop-focus-arc {
    opacity: 1;
}

.loop-radar[data-active="0"] .loop-focus-arc { transform: rotate(-90deg); }
.loop-radar[data-active="1"] .loop-focus-arc { transform: rotate(-18deg); }
.loop-radar[data-active="2"] .loop-focus-arc { transform: rotate(54deg); }
.loop-radar[data-active="3"] .loop-focus-arc { transform: rotate(126deg); }
.loop-radar[data-active="4"] .loop-focus-arc { transform: rotate(198deg); }

.loop-tether {
    stroke: rgba(0, 107, 116, 0.55);
    stroke-width: 1.1;
    stroke-linecap: round;
    opacity: 0;
    transition: opacity 0.4s ease, stroke 0.4s ease;
}

.loop-radar.is-linked[data-active="0"] .loop-tether[data-tether="0"],
.loop-radar.is-linked[data-active="1"] .loop-tether[data-tether="1"],
.loop-radar.is-linked[data-active="2"] .loop-tether[data-tether="2"],
.loop-radar.is-linked[data-active="3"] .loop-tether[data-tether="3"],
.loop-radar.is-linked[data-active="4"] .loop-tether[data-tether="4"] {
    opacity: 1;
    stroke: rgba(0, 107, 116, 0.7);
}

.loop-radar-core {
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
    width: 104px;
    height: 104px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 2;
    overflow: hidden;
    padding: 0;
    background: rgba(255, 255, 255, 0.75);
    border: 2px solid rgba(142, 229, 223, 0.55);
    box-shadow:
        0 0 0 8px rgba(142, 229, 223, 0.12),
        0 12px 32px rgba(142, 229, 223, 0.28);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    transition: border-color 0.4s ease, box-shadow 0.4s ease;
}

.loop-radar.is-linked .loop-radar-core {
    border-color: rgba(0, 107, 116, 0.4);
    box-shadow:
        0 0 0 10px rgba(142, 229, 223, 0.14),
        0 14px 36px rgba(0, 107, 116, 0.14);
}

.loop-radar-avatar {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    border-radius: 50%;
}

.loop-node {
    --angle: calc(var(--i) * 72deg - 90deg);
    position: absolute;
    left: 50%;
    top: 50%;
    width: 64px;
    height: 64px;
    margin: 0;
    padding: 0;
    border-radius: 50%;
    border: 1px solid rgba(142, 229, 223, 0.4);
    background: rgba(255, 255, 255, 0.72);
    color: var(--color-cyan-800);
    cursor: pointer;
    z-index: 3;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 2px;
    box-shadow: 0 6px 18px rgba(142, 229, 223, 0.18);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    transform: translate(-50%, -50%) rotate(var(--angle)) translate(var(--orbit-radius)) rotate(calc(-1 * var(--angle)));
    transition:
        transform 0.45s cubic-bezier(0.22, 1, 0.36, 1),
        box-shadow 0.4s ease,
        border-color 0.4s ease,
        background 0.4s ease,
        opacity 0.4s ease;
}

.loop-node i {
    font-style: normal;
    font-size: 12px;
    font-weight: 700;
    line-height: 1;
    color: var(--color-cyan-800);
}

.loop-node b {
    font-size: 11px;
    font-weight: 600;
    line-height: 1;
    color: #132B2D;
}

.loop-node.is-active {
    z-index: 5;
    border-color: rgba(0, 107, 116, 0.55);
    background: #ffffff;
    box-shadow:
        0 0 0 1px rgba(255, 255, 255, 0.9),
        0 0 0 7px rgba(142, 229, 223, 0.22),
        0 16px 40px rgba(0, 107, 116, 0.16);
    transform: translate(-50%, -50%) rotate(var(--angle)) translate(var(--orbit-radius)) rotate(calc(-1 * var(--angle))) scale(1.08);
}

.loop-radar.is-dimming .loop-node:not(.is-active) {
    opacity: 0.38;
    filter: grayscale(0.15);
}

.loop-node-highlight {
    width: 70px;
    height: 70px;
    border-color: rgba(0, 107, 116, 0.4);
    background: rgba(255, 255, 255, 0.88);
    box-shadow: 0 8px 24px rgba(142, 229, 223, 0.28);
}

.loop-node-highlight i {
    color: var(--color-cyan-900);
}

.loop-console {
    display: flex;
    flex-direction: column;
    gap: 10px;
    min-width: 0;
}

.loop-step {
    position: relative;
    display: grid;
    grid-template-columns: auto 1fr auto;
    gap: 14px;
    align-items: center;
    padding: 14px 16px 14px 18px;
    border-radius: var(--radius-lg);
    border: 1px solid rgba(142, 229, 223, 0.22);
    background: rgba(255, 255, 255, 0.45);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    cursor: pointer;
    outline: none;
    box-shadow: none;
    transition:
        border-color 0.4s ease,
        background 0.4s ease,
        box-shadow 0.4s ease,
        opacity 0.4s ease;
}

.loop-step::before {
    content: '';
    position: absolute;
    left: 0;
    top: 12px;
    bottom: 12px;
    width: 3px;
    border-radius: 999px;
    background: transparent;
    transition: background 0.4s ease, transform 0.45s cubic-bezier(0.22, 1, 0.36, 1);
    transform: scaleY(0.4);
}

.loop-step-code {
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 0.08em;
    color: var(--color-cyan-800);
    min-width: 46px;
}

.loop-step-body h4 {
    margin: 0 0 4px;
    font-size: 1rem;
    font-weight: 700;
    color: var(--text-primary);
}

.loop-step-body p {
    margin: 0;
    font-size: 12px;
    line-height: 1.55;
    color: var(--text-secondary);
}

.loop-step-tag {
    font-size: 11px;
    color: var(--color-cyan-800);
    border: 1px solid rgba(111, 201, 198, 0.4);
    background: rgba(142, 229, 223, 0.12);
    border-radius: 999px;
    padding: 4px 10px;
    white-space: nowrap;
}

.loop-step:hover,
.loop-step.is-active,
.loop-step:focus-visible {
    border-color: rgba(0, 107, 116, 0.28);
    background: rgba(255, 255, 255, 0.88);
    box-shadow:
        0 10px 28px rgba(0, 107, 116, 0.08),
        inset 0 0 0 1px rgba(142, 229, 223, 0.12);
}

.loop-step.is-active::before,
.loop-step:focus-visible::before {
    background: linear-gradient(180deg, #4AA5A5, #006B74);
    transform: scaleY(1);
}

.loop-step.is-active .loop-step-code {
    color: var(--color-cyan-900);
}

.loop-step.is-active .loop-step-body h4 {
    color: #0B2426;
}

.loop-console.is-dimming .loop-step:not(.is-active) {
    opacity: 0.42;
}

.loop-step-highlight {
    border-color: rgba(142, 229, 223, 0.45);
    background: rgba(142, 229, 223, 0.14);
}

.loop-step-highlight .loop-step-code,
.loop-step-highlight .loop-step-tag {
    color: var(--color-cyan-900);
    border-color: rgba(142, 229, 223, 0.4);
    background: rgba(255, 255, 255, 0.55);
}

.loop-hud-foot {
    position: relative;
    z-index: 2;
    margin-top: 20px;
    padding: 16px 18px;
    border-radius: var(--radius-lg);
    border: 1px solid rgba(142, 229, 223, 0.28);
    background: rgba(255, 255, 255, 0.4);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    display: grid;
    grid-template-columns: auto 1fr;
    gap: 14px;
    align-items: center;
}

.loop-hud-foot-label {
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 0.08em;
    color: var(--color-cyan-800);
    padding: 6px 10px;
    border: 1px solid rgba(142, 229, 223, 0.35);
    background: rgba(255, 255, 255, 0.55);
    border-radius: 999px;
    white-space: nowrap;
}

.loop-hud-foot p {
    margin: 0;
    font-size: 14px;
    line-height: 1.65;
    color: var(--text-secondary);
}

.loop-hud-foot strong {
    color: var(--color-cyan-900);
    font-weight: 700;
}

/* 兼容旧高亮块（其他页面若引用） */
.highlight-box {
    display: flex;
    align-items: center;
    gap: 20px;
    max-width: 800px;
    margin: 0 auto;
    padding: 24px 32px;
    background: linear-gradient(90deg, rgba(0, 107, 116, 0.08), rgba(1, 254, 239, 0.08));
    border: 1px solid rgba(1, 254, 239, 0.28);
    border-radius: var(--radius-xl);
    box-shadow: 0 4px 20px rgba(142, 229, 223, 0.25);
}

.highlight-icon {
    width: 40px;
    height: 40px;
    flex-shrink: 0;
}

.highlight-content p {
    font-size: var(--text-base);
    line-height: var(--leading-relaxed);
    color: var(--text-secondary);
}

.highlight-content strong {
    color: var(--color-cyan-800);
    font-weight: var(--weight-bold);
}

/* ========== Evia AI 助手 ========== */
.evia-section {
    position: relative;
    overflow: hidden;
}

/* Evia 区域使用品牌纹理 + 人文光感 */
.evia-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: url('../images/bg/evia-texture.png');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    opacity: 0.12;
    mix-blend-mode: multiply;
    z-index: 0;
}

.evia-human-bg {
    position: absolute;
    top: -10%;
    right: -8%;
    width: min(52vw, 640px);
    height: min(70vw, 780px);
    background:
        linear-gradient(135deg, rgba(248, 255, 254, 0.35), rgba(142, 229, 223, 0.18)),
        url('../images/bg/light-portrait.png');
    background-size: cover;
    background-position: center;
    border-radius: 48% 52% 42% 58%;
    filter: blur(0.2px);
    opacity: 0.35;
    z-index: 0;
    pointer-events: none;
}

.evia-glow {
    position: absolute;
    top: 50%;
    left: 30%;
    transform: translate(-50%, -50%);
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(142, 229, 223, 0.15) 0%, transparent 70%);
    z-index: 0;
}

.evia-panel {
    position: relative;
    z-index: 1;
}

/* ========== Evia 711 实景演示 ========== */
.evia-scene {
    margin-bottom: 48px;
    border-radius: 28px;
    padding: 40px 36px 44px;
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    box-shadow: var(--shadow-card);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
}

.evia-scene-head {
    text-align: center;
    max-width: 720px;
    margin: 0 auto 40px;
}

.evia-scene-eyebrow {
    display: inline-block;
    font-size: var(--text-xs);
    font-weight: var(--weight-semibold);
    letter-spacing: var(--tracking-widest);
    color: var(--text-brand);
    margin-bottom: 14px;
}

.evia-scene-head h3 {
    font-size: clamp(1.6rem, 3.5vw, 2.4rem);
    font-weight: var(--weight-bold);
    color: var(--text-primary);
    margin-bottom: 12px;
}

.evia-scene-head p {
    font-size: var(--text-base);
    line-height: var(--leading-relaxed);
    color: var(--text-secondary);
    margin: 0;
    text-align: center;
}

.evia-story-grid {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    align-items: center;
    gap: 48px 56px;
    width: 100%;
    margin: 0 auto;
}

.evia-phone {
    position: relative;
    flex: 0 0 auto;
    width: min(100%, 320px);
    height: 640px;
    aspect-ratio: auto;
    padding: 11px;
    border-radius: 44px;
    cursor: pointer;
    background:
        linear-gradient(145deg, #2a3f42 0%, #0e1c1e 42%, #16282b 100%);
    box-shadow:
        0 28px 60px rgba(8, 21, 24, 0.22),
        0 8px 24px rgba(8, 21, 24, 0.12),
        inset 0 1px 0 rgba(255, 255, 255, 0.18),
        inset 0 -1px 0 rgba(0, 0, 0, 0.35);
}

.evia-phone-bezel {
    width: 100%;
    height: 100%;
    border-radius: 36px;
    padding: 2px;
    background: linear-gradient(160deg, #1a2e31, #0a1416);
    box-shadow: inset 0 0 0 1px rgba(142, 229, 223, 0.12);
}

.evia-phone-btn {
    position: absolute;
    background: linear-gradient(90deg, #1c3033, #0d181a);
    border-radius: 2px;
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.12);
}

.evia-phone-btn-vol {
    left: -3px;
    top: 118px;
    width: 3px;
    height: 86px;
}

.evia-phone-btn-vol::before,
.evia-phone-btn-vol::after {
    content: '';
    position: absolute;
    left: 0;
    width: 3px;
    border-radius: 2px;
    background: inherit;
    box-shadow: inherit;
}

.evia-phone-btn-vol::before {
    top: -28px;
    height: 22px;
}

.evia-phone-btn-vol::after {
    top: 0;
    height: 36px;
}

.evia-phone-btn-pwr {
    right: -3px;
    top: 148px;
    width: 3px;
    height: 62px;
}

.evia-phone-screen {
    position: relative;
    width: 100%;
    height: 100%;
    background: linear-gradient(180deg, #f7fcfb 0%, #e8f6f4 100%);
    border-radius: 34px;
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

.evia-phone-island {
    position: absolute;
    top: 10px;
    left: 50%;
    transform: translateX(-50%);
    width: 96px;
    height: 26px;
    border-radius: 20px;
    background: #0a1416;
    z-index: 3;
    box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.06);
    pointer-events: none;
}

.evia-phone-status {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-shrink: 0;
    padding: 12px 18px 0;
    min-height: 40px;
    font-size: 12px;
    font-weight: 600;
    color: var(--text-primary);
    letter-spacing: 0.02em;
    position: relative;
    z-index: 2;
}

.evia-phone-status > span:first-child {
    min-width: 42px;
}

.evia-phone-status-icons {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    color: var(--text-primary);
    min-width: 64px;
    justify-content: flex-end;
}

.evia-phone-time {
    text-align: center;
    font-size: 11px;
    color: var(--text-tertiary);
    letter-spacing: 0.12em;
    padding: 18px 12px 8px;
    text-transform: uppercase;
    flex-shrink: 0;
    position: relative;
    z-index: 1;
}

.evia-phone-msgs {
    flex: 1;
    min-height: 0;
    overflow-x: hidden;
    overflow-y: auto;
    padding: 4px 14px 8px;
    display: flex;
    flex-direction: column;
    gap: 10px;
    scrollbar-width: none;
    -ms-overflow-style: none;
    position: relative;
    z-index: 1;
}

.evia-phone-msgs::-webkit-scrollbar {
    display: none;
    width: 0;
    height: 0;
}

.evia-phone-home {
    flex-shrink: 0;
    width: 108px;
    height: 4px;
    margin: 6px auto 10px;
    border-radius: 999px;
    background: rgba(8, 21, 24, 0.22);
}

.evia-pm {
    max-width: 88%;
    padding: 10px 14px;
    border-radius: 14px;
    font-size: 12.5px;
    line-height: 1.65;
    opacity: 0;
    transform: translateY(14px);
    transition: opacity 0.6s cubic-bezier(0.2, 0.7, 0.2, 1), transform 0.6s cubic-bezier(0.2, 0.7, 0.2, 1);
    color: var(--text-primary);
}

.evia-pm.on {
    opacity: 1;
    transform: none;
}

.evia-pm.ai {
    background: #fff;
    border: 1px solid rgba(142, 229, 223, 0.35);
    align-self: flex-start;
    border-bottom-left-radius: 4px;
    box-shadow: 0 4px 14px rgba(0, 107, 116, 0.06);
}

.evia-pm.user {
    background: #0b2428;
    color: #e8f4f3;
    align-self: flex-end;
    border-bottom-right-radius: 4px;
}

.evia-pm.sys {
    align-self: center;
    background: transparent;
    border: 1px dashed rgba(0, 107, 116, 0.3);
    color: #006B74;
    font-size: 11px;
    padding: 6px 14px;
    border-radius: 20px;
    letter-spacing: 0.5px;
    max-width: 100%;
}

.evia-pm.api {
    align-self: stretch;
    max-width: 100%;
    background: linear-gradient(90deg, rgba(142, 229, 223, 0.18), #fff);
    border: 1px solid rgba(142, 229, 223, 0.45);
    font-size: 11.5px;
}

.evia-pm.api .ok {
    color: #006B74;
    font-weight: 700;
}

.evia-pm-tag {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 10px;
    letter-spacing: 1px;
    color: #006B74;
    font-weight: 700;
    margin-bottom: 5px;
}

.evia-pm-tag img {
    width: 14px;
    height: 14px;
    border-radius: 4px;
    object-fit: cover;
}

.evia-order {
    background: rgba(142, 229, 223, 0.12);
    border: 1px solid rgba(142, 229, 223, 0.35);
    border-radius: 10px;
    padding: 9px 12px;
    margin-top: 8px;
    font-size: 11.5px;
}

.evia-oi {
    display: flex;
    justify-content: space-between;
    padding: 2px 0;
    color: var(--text-secondary);
}

.evia-ot {
    display: flex;
    justify-content: space-between;
    gap: 8px;
    border-top: 1px dashed rgba(142, 229, 223, 0.45);
    margin-top: 6px;
    padding-top: 6px;
    font-weight: 700;
    color: var(--text-primary);
}

.evia-qrcode {
    margin-top: 8px;
    background: #0b2428;
    color: #8EE5DF;
    border-radius: 10px;
    padding: 10px;
    text-align: center;
    font-size: 18px;
    letter-spacing: 6px;
    font-weight: 700;
}

.evia-story-steps {
    position: relative;
    padding-top: 0;
    flex: 0 1 480px;
    max-width: 480px;
    width: 100%;
}

.evia-sstep {
    position: relative;
    border-left: 2px solid rgba(106, 196, 190, 0.28);
    padding: 6px 0 34px 28px;
    opacity: 0.35;
    transition: opacity 0.6s ease;
}

.evia-sstep:last-child {
    padding-bottom: 6px;
}

.evia-sstep.lit {
    opacity: 1;
}

.evia-sstep::before {
    content: '';
    position: absolute;
    left: -8px;
    top: 12px;
    width: 14px;
    height: 14px;
    border-radius: 50%;
    background: var(--bg-elevated);
    border: 2px solid rgba(106, 196, 190, 0.55);
    transition: background 0.5s ease, border-color 0.5s ease, box-shadow 0.5s ease;
}

.evia-sstep.lit::before {
    background: var(--color-primary);
    border-color: var(--color-primary);
    box-shadow: 0 0 14px rgba(142, 229, 223, 0.55);
}

.evia-st-time {
    font-size: 12px;
    letter-spacing: 2px;
    color: var(--text-brand);
    font-weight: 600;
}

.evia-st-t {
    font-size: clamp(1.05rem, 1.8vw, 1.25rem);
    font-weight: 700;
    color: var(--text-primary);
    margin: 6px 0;
}

.evia-st-d {
    font-size: 13.5px;
    color: var(--text-secondary);
    line-height: 1.8;
    max-width: 480px;
}

.evia-apis {
    display: flex;
    gap: 8px;
    margin-top: 12px;
    flex-wrap: wrap;
}

.evia-api-badge {
    font-size: 11px;
    letter-spacing: 0.5px;
    padding: 5px 13px;
    border-radius: 16px;
    border: 1px solid var(--border-brand);
    color: var(--text-brand);
    background: rgba(142, 229, 223, 0.12);
}

.evia-api-badge.core {
    background: rgba(142, 229, 223, 0.28);
    border-color: rgba(106, 196, 190, 0.55);
    font-weight: 600;
}

/* 旧版人像栅格已移除 */


.evia-demo {
    display: grid;
    grid-template-columns: 1fr;
    gap: 28px;
    position: relative;
    z-index: 2;
    margin-top: 8px;
    padding-top: 40px;
    border-top: 1px solid rgba(142, 229, 223, 0.22);
    clear: both;
}

.evia-demo-side {
    display: flex;
    flex-direction: column;
    gap: 16px;
    min-width: 0;
    max-width: 780px;
    width: 100%;
    margin: 0 auto;
}

.evia-demo-heading {
    text-align: center;
}

.evia-demo-heading .evia-demo-label {
    display: inline-block;
    font-size: var(--text-xs);
    font-weight: var(--weight-bold);
    letter-spacing: var(--tracking-wider);
    color: var(--text-brand);
    margin-bottom: 8px;
}

.evia-demo-heading h3 {
    font-size: clamp(1.35rem, 2.4vw, 1.85rem);
    font-weight: var(--weight-bold);
    color: var(--text-primary);
    margin-bottom: 8px;
}

.evia-demo-heading p {
    font-size: var(--text-sm);
    color: var(--text-secondary);
    line-height: var(--leading-relaxed);
    margin: 0;
}

.phone-frame {
    width: 300px;
    height: 600px;
    background: var(--bg-elevated);
    border: 2px solid var(--border-default);
    border-radius: 40px;
    padding: 12px;
    position: relative;
    box-shadow: 0 20px 60px rgba(8, 21, 24, 0.12), 0 0 40px rgba(142, 229, 223, 0.15);
    overflow: hidden;
}

.phone-notch {
    position: absolute;
    top: 12px;
    left: 50%;
    transform: translateX(-50%);
    width: 100px;
    height: 6px;
    background: var(--border-strong);
    border-radius: 0 0 10px 10px;
    z-index: 3;
}

.phone-screen {
    width: 100%;
    height: 100%;
    background: linear-gradient(180deg, #F8FFFE 0%, #F0FAFA 100%);
    border-radius: 28px;
    padding: 28px 16px 16px;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.phone-screen::-webkit-scrollbar { display: none; }

.phone-status {
    display: flex;
    justify-content: space-between;
    font-size: var(--text-xs);
    color: var(--text-tertiary);
    padding: 0 4px 8px;
    border-bottom: 1px solid var(--border-subtle);
}

.phone-notification {
    display: flex;
    gap: 12px;
    padding: 12px;
    background: rgba(255, 255, 255, 0.7);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
}

.notif-icon {
    width: 32px;
    height: 32px;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.notif-ring {
    background: var(--color-connect-dim);
    color: var(--color-cyan-800);
}

.notif-title {
    font-size: var(--text-xs);
    font-weight: var(--weight-semibold);
    margin-bottom: 2px;
    color: var(--text-primary);
}

.notif-desc {
    font-size: 10px;
    color: var(--text-tertiary);
    line-height: 1.4;
}

.evia-chat {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.chat-bubble {
    display: flex;
    gap: 8px;
    align-items: flex-start;
}

.chat-user {
    justify-content: flex-end;
}

.chat-avatar {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    background: var(--gradient-depth);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 11px;
    font-weight: var(--weight-bold);
    color: var(--text-on-primary);
    flex-shrink: 0;
    overflow: hidden;
}

.chat-avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.chat-text {
    font-size: 11px;
    line-height: 1.6;
    padding: 10px 14px;
    border-radius: 14px;
    max-width: 85%;
}

.chat-ai .chat-text {
    background: linear-gradient(135deg, #FFFFFF 0%, var(--color-cyan-50) 45%, var(--color-cyan-100) 100%);
    border: 1px solid rgba(142, 229, 223, 0.28);
    border-top-left-radius: 4px;
    color: var(--text-secondary);
}

.chat-user .chat-text {
    background: var(--gradient-depth);
    color: var(--text-on-primary);
    font-weight: var(--weight-medium);
    border-top-right-radius: 4px;
}

/* Evia 特性 — 与演示/聊天同一板块底部 */
.evia-features {
    grid-column: 1 / -1;
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 16px;
}

.evia-feature {
    padding: 18px 16px;
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    transition: all var(--transition-base);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    box-shadow: var(--shadow-card);
}

.evia-feature:hover {
    background: var(--bg-card-hover);
    border-color: var(--border-brand);
    transform: translateY(-4px);
    box-shadow: var(--shadow-card-hover);
}

.feature-icon {
    width: 32px;
    height: 32px;
    color: var(--c);
    margin-bottom: 12px;
    filter: drop-shadow(0 2px 8px color-mix(in srgb, var(--c) 30%, transparent));
}

.evia-feature h4 {
    font-size: var(--text-base);
    font-weight: var(--weight-bold);
    margin-bottom: 6px;
    color: var(--text-primary);
}

.evia-feature p {
    font-size: var(--text-xs);
    line-height: var(--leading-relaxed);
    color: var(--text-secondary);
    margin: 0;
}

/* ========== 产品矩阵 ========== */
.products {
    position: relative;
}

/* 产品矩阵区域使用品牌纹理 */
.products::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: url('../images/bg/products-texture.png');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    opacity: 0.10;
    mix-blend-mode: multiply;
    z-index: 0;
}

.product-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(min(320px, 100%), 1fr));
    gap: 24px;
    position: relative;
    z-index: 1;
}

.product-showcase {
    position: relative;
    padding: 32px;
    background: rgba(255, 255, 255, 0.55);
    border: 1px solid rgba(142, 229, 223, 0.18);
    border-radius: var(--radius-xl);
    overflow: hidden;
    transition: all var(--transition-base);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    min-height: 280px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    box-shadow: 0 4px 20px rgba(142, 229, 223, 0.06);
}

.product-showcase:hover {
    background: rgba(255, 255, 255, 0.82);
    border-color: rgba(142, 229, 223, 0.35);
    transform: translateY(-4px);
    box-shadow: 0 10px 28px rgba(142, 229, 223, 0.14);
}

.showcase-glow {
    position: absolute;
    top: -50%;
    right: -30%;
    width: 300px;
    height: 300px;
    border-radius: 50%;
    filter: blur(60px);
    opacity: 0.12;
    transition: opacity var(--transition-base);
}

.product-showcase:hover .showcase-glow {
    opacity: 0.22;
}

.showcase-glow-primary { background: var(--color-primary); }
.showcase-glow-connect { background: var(--color-connect); }
.showcase-glow-signal { background: var(--color-signal); }

.showcase-content {
    position: relative;
    z-index: 1;
}

.showcase-category {
    display: inline-block;
    font-size: 10px;
    font-weight: var(--weight-bold);
    letter-spacing: var(--tracking-wider);
    color: var(--text-tertiary);
    margin-bottom: 16px;
}

.showcase-content h3 {
    font-size: var(--text-xl);
    font-weight: var(--weight-bold);
    margin-bottom: 12px;
    color: var(--text-primary);
}

.showcase-content p {
    font-size: var(--text-sm);
    line-height: var(--leading-relaxed);
    color: var(--text-secondary);
    margin-bottom: 16px;
}

.showcase-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    margin-bottom: 16px;
}

.showcase-status {
    align-self: flex-start;
}

/* ========== 品牌愿景 ========== */
.vision {
    position: relative;
    overflow: hidden;
}

/* 品牌愿景区域使用品牌纹理 */
.vision::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: url('../images/bg/vision-texture.png');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    opacity: 0.10;
    mix-blend-mode: multiply;
    z-index: 0;
}

.vision-bg {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background:
        radial-gradient(ellipse at 20% 30%, rgba(142, 229, 223, 0.10) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 70%, rgba(148, 229, 243, 0.10) 0%, transparent 50%);
    z-index: 0;
}

/* API 合作方圆形标识 */
.partner-logos {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 28px 40px;
    margin: 0 auto 48px;
    position: relative;
    z-index: 1;
}

.partner-logo-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    min-width: 88px;
}

.partner-logo-circle {
    width: 56px;
    height: 56px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    background: #fff;
    box-shadow: 0 6px 20px rgba(8, 21, 24, 0.12);
    border: 2px solid rgba(255, 255, 255, 0.55);
}

.partner-logo-circle img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.partner-logo-more .partner-logo-circle {
    background: linear-gradient(145deg, var(--color-cyan-50, #F2FFFD) 0%, var(--color-cyan-100, #D8F7F3) 100%);
    border: 2px dashed rgba(8, 120, 118, 0.28);
    color: var(--color-primary, #0B7A75);
    font-size: 26px;
    font-weight: 500;
    line-height: 1;
    box-shadow: none;
}

.partner-logo-name {
    font-size: var(--text-sm);
    font-weight: var(--weight-semibold);
    color: var(--text-primary);
}

.partner-logo-scene {
    font-size: var(--text-xs);
    color: var(--text-tertiary);
    letter-spacing: var(--tracking-wide);
}

.vision-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(min(260px, 100%), 1fr));
    gap: 24px;
    margin-bottom: var(--space-16);
    position: relative;
    z-index: 1;
}

.vision-card {
    padding: 32px 28px;
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-xl);
    text-align: left;
    transition: all var(--transition-base);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    position: relative;
    overflow: hidden;
    box-shadow: var(--shadow-card);
}

.vision-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--gradient-depth);
    opacity: 0;
    transition: opacity var(--transition-base);
}

.vision-card:hover {
    background: var(--bg-card-hover);
    border-color: var(--border-brand);
    transform: translateY(-4px);
    box-shadow: var(--shadow-card-hover);
}

.vision-card:hover::before {
    opacity: 1;
}

.vision-card-icon {
    width: 48px;
    height: 48px;
    color: var(--color-cyan-600);
    margin-bottom: 20px;
}

.vision-card:nth-child(2) .vision-card-icon { color: var(--color-cyan-700); }
.vision-card:nth-child(3) .vision-card-icon { color: var(--color-cyan-800); }
.vision-card:nth-child(4) .vision-card-icon { color: var(--color-cyan-900); }

.vision-label {
    display: block;
    font-size: var(--text-xs);
    font-weight: var(--weight-bold);
    letter-spacing: var(--tracking-wider);
    color: var(--text-tertiary);
    margin-bottom: 12px;
}

.vision-card p {
    font-size: var(--text-base);
    line-height: var(--leading-relaxed);
    color: var(--text-secondary);
}

/* 品牌客群 */
.vision-audience {
    max-width: 600px;
    margin: 0 auto;
    padding: 32px;
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-xl);
    text-align: center;
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    box-shadow: var(--shadow-card);
    position: relative;
    z-index: 1;
}

.audience-title {
    font-size: var(--text-sm);
    font-weight: var(--weight-bold);
    letter-spacing: var(--tracking-wider);
    color: var(--text-tertiary);
    margin-bottom: 24px;
}

.audience-grid {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 32px;
}

.audience-item p {
    font-size: var(--text-lg);
    font-weight: var(--weight-medium);
    color: var(--text-secondary);
    margin-top: 12px;
}

.audience-badge {
    display: inline-block;
    font-size: var(--text-sm);
    font-weight: var(--weight-bold);
    padding: 6px 20px;
    border-radius: var(--radius-full);
    background: var(--color-primary-dim);
    color: var(--text-brand);
    border: 1px solid var(--border-brand);
}

.audience-badge-b {
    background: linear-gradient(90deg, rgba(0, 107, 116, 0.14) 0%, rgba(142, 229, 223, 0.22) 100%);
    color: var(--color-cyan-800);
    border-color: rgba(1, 254, 239, 0.35);
}

.audience-divider {
    width: 1px;
    height: 60px;
    background: var(--border-default);
}

/* ========== 底部 ========== */
.footer {
    position: relative;
    padding: var(--space-24) 0 var(--space-8);
    border-top: 1px solid var(--border-subtle);
    background: linear-gradient(180deg, var(--bg-base) 0%, var(--bg-deep) 100%);
    z-index: 1;
}

.footer-glow {
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 600px;
    height: 200px;
    background: radial-gradient(ellipse at center top, rgba(142, 229, 223, 0.12) 0%, transparent 70%);
}

.footer-top {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 48px;
    margin-bottom: var(--space-12);
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 20px;
}

.footer-logo-img {
    height: 36px;
    width: auto;
    display: block;
    filter: drop-shadow(0 2px 8px rgba(142, 229, 223, 0.4));
}

.footer-logo .logo-mark {
    width: 32px;
    color: var(--color-cyan-700);
}

.footer-slogan {
    font-size: var(--text-base);
    font-weight: var(--weight-medium);
    color: var(--text-secondary);
    line-height: var(--leading-relaxed);
    margin-bottom: 12px;
}

.footer-slogan span {
    font-size: var(--text-sm);
    color: var(--text-tertiary);
}

.footer-company {
    font-size: var(--text-xs);
    color: var(--text-quaternary);
    line-height: var(--leading-relaxed);
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
}

.footer-col h5 {
    font-size: var(--text-sm);
    font-weight: var(--weight-bold);
    margin-bottom: 16px;
    color: var(--text-primary);
}

.footer-col a {
    display: block;
    font-size: var(--text-sm);
    color: var(--text-tertiary);
    padding: 4px 0;
    transition: color var(--transition-base);
}

.footer-col a:hover {
    color: var(--text-brand);
}

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
    flex-wrap: wrap;
    gap: 16px 24px;
    padding-top: var(--space-8);
    border-top: 1px solid var(--border-subtle);
    font-size: var(--text-xs);
    color: var(--text-quaternary);
}

.footer-copy {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.footer-tagline {
    color: var(--text-quaternary);
}

.footer-beian {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    gap: 6px;
}

.footer-beian a {
    color: var(--text-quaternary);
    transition: color var(--transition-fast);
}

.footer-beian a:hover {
    color: var(--text-brand);
}

.footer-beian-police {
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

.footer-beian-police img {
    width: 14px;
    height: 14px;
    flex-shrink: 0;
}

/* ========== 回到顶部 ========== */
.back-to-top {
    position: fixed;
    right: 28px;
    bottom: 28px;
    z-index: 90;
    width: 48px;
    height: 48px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border: 1px solid var(--border-default);
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.92);
    color: var(--text-brand);
    box-shadow: 0 8px 28px rgba(8, 21, 24, 0.10);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transform: translateY(12px);
    pointer-events: none;
    transition: opacity 0.25s ease, transform 0.25s ease, visibility 0.25s, background 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
    pointer-events: auto;
}

.back-to-top:hover {
    background: #FFFFFF;
    border-color: var(--border-brand-strong);
    color: var(--color-cyan-800);
    box-shadow: 0 10px 32px rgba(142, 229, 223, 0.28);
}

.back-to-top:active {
    transform: translateY(1px);
}

@media (max-width: 768px) {
    .back-to-top {
        right: 16px;
        bottom: 20px;
        width: 44px;
        height: 44px;
    }
}

/* ========== Reveal 动画 ========== */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s cubic-bezier(0.4, 0, 0.2, 1), transform 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

.reveal.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ========== 响应式 ========== */
@media (max-width: 1100px) and (min-width: 769px) {
    .nav-mega-menu {
        min-width: 0;
        width: min(720px, 100%);
        max-width: min(720px, calc(100% - 24px));
        left: 0;
        right: auto;
        gap: 8px 16px;
        padding: 22px 20px;
    }
}

@media (max-width: 1024px) {
    .infra-grid {
        grid-template-columns: 1fr;
        gap: 32px;
    }

    .infra-merge {
        order: 2;
        min-height: auto;
    }

    .loop-hud-body {
        grid-template-columns: 1fr;
        gap: 24px;
    }

    .evia-story-grid {
        gap: 32px;
    }

    .evia-phone {
        position: relative;
        width: min(100%, 300px);
        height: 600px;
        margin: 0 auto;
    }

    .evia-story-steps {
        flex: 1 1 100%;
        max-width: 520px;
        margin: 0 auto;
    }

    .evia-scene {
        padding: 28px 20px 32px;
    }

    .evia-features {
        grid-template-columns: 1fr 1fr;
    }

    .footer-top {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    :root {
        --space-32: 80px;
        --space-24: 64px;
        --space-20: 48px;
    }

    .nav-menu {
        display: none;
        position: fixed;
        top: var(--navbar-height);
        left: 0;
        right: 0;
        background: #FFFFFF;
        flex-direction: column;
        align-items: stretch;
        padding: 12px 16px 20px;
        gap: 0;
        border-bottom: 1px solid var(--border-subtle);
        max-height: calc(100vh - var(--navbar-height));
        overflow-x: hidden;
        overflow-y: auto;
        z-index: 99;
        -webkit-overflow-scrolling: touch;
    }

    .nav-menu.active {
        display: flex;
    }

    .nav-link {
        width: 100%;
        padding: 14px 16px;
    }

    .nav-item-dropdown {
        width: 100%;
    }

    .nav-dropdown-trigger {
        width: 100%;
        justify-content: space-between;
    }

    .nav-mega-menu {
        position: static;
        min-width: 0;
        width: 100%;
        grid-template-columns: 1fr;
        gap: 18px;
        padding: 8px 4px 12px;
        margin: 0;
        border: none;
        border-radius: 12px;
        box-shadow: none;
        background: rgba(142, 229, 223, 0.06);
        transform: none;
        opacity: 1;
        visibility: visible;
        pointer-events: auto;
        height: min(420px, calc(100vh - var(--navbar-height) - 160px));
        max-height: min(420px, calc(100vh - var(--navbar-height) - 160px));
        overflow-x: hidden;
        overflow-y: auto;
        -webkit-overflow-scrolling: touch;
        overscroll-behavior: contain;
    }

    .nav-item-dropdown.open .nav-mega-menu {
        transform: none;
        opacity: 1;
        visibility: visible;
        pointer-events: auto;
    }

    .mega-col {
        width: 100%;
        gap: 4px;
        padding: 0;
    }

    .mega-col + .mega-col {
        padding-top: 8px;
        border-top: 1px solid var(--border-subtle);
    }

    .mega-col-title,
    .mega-col-heading {
        position: static;
        top: auto;
        z-index: auto;
        display: flex;
        align-items: center;
        gap: 8px;
        width: 100%;
        margin: 0 0 6px;
        padding: 8px 10px;
        border: 0;
        border-radius: 10px;
        background: rgba(142, 229, 223, 0.16);
        color: var(--text-brand);
        font-size: 13px;
        font-weight: var(--weight-semibold);
        box-shadow: none;
        box-sizing: border-box;
    }

    .mega-col-icon {
        width: 18px;
        height: 18px;
        border-radius: 5px;
        background: #FFFFFF;
        padding: 2px;
        box-sizing: border-box;
        object-fit: contain;
    }

    .mega-col-label {
        flex: 1;
        min-width: 0;
        overflow: visible;
        white-space: normal;
    }

    .mega-col-title .mega-col-label > span,
    .mega-col-heading .mega-col-label > span {
        opacity: 0.72;
    }

    .nav-toggle {
        display: flex;
    }

    .btn-ghost {
        display: none;
    }

    .hero {
        padding: 100px 16px 60px;
        min-height: 100svh;
    }

    .hero-wrap {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .hero-right {
        min-height: 260px;
    }

    .hero-logo-mask {
        max-width: 260px;
    }

    .philosophy-steps {
        flex-direction: column;
        gap: 16px;
    }

    .step-connector {
        transform: rotate(90deg);
        padding: 8px 0;
    }

    .step-card {
        max-width: 100%;
    }

    .product-grid {
        grid-template-columns: 1fr;
    }

    .evia-features {
        grid-template-columns: 1fr 1fr;
    }

    .loop-hud-frame {
        padding: 16px 12px 14px;
    }

    .loop-hud-bar {
        justify-content: center;
        text-align: center;
    }

    .loop-radar {
        --orbit-size: min(300px, 86vw);
    }

    .loop-node {
        width: 56px;
        height: 56px;
    }

    .loop-node-highlight {
        width: 62px;
        height: 62px;
    }

    .loop-radar-core {
        width: 92px;
        height: 92px;
    }

    .loop-step {
        grid-template-columns: auto 1fr;
        gap: 10px;
    }

    .loop-step-tag {
        grid-column: 2;
        justify-self: start;
    }

    .loop-hud-foot {
        grid-template-columns: 1fr;
        text-align: left;
    }

    .footer-links {
        grid-template-columns: 1fr;
        gap: 24px;
    }

    .footer-bottom {
        flex-direction: column;
        align-items: center;
        gap: 12px;
        text-align: center;
    }

    .footer-beian {
        align-items: center;
    }

    .partner-logos {
        gap: 20px 24px;
        margin-bottom: 36px;
    }

    .partner-logo-circle {
        width: 48px;
        height: 48px;
        font-size: 16px;
    }

    .audience-grid {
        flex-direction: column;
        gap: 20px;
    }

    .audience-divider {
        width: 60px;
        height: 1px;
    }
}

@media (max-width: 480px) {
    .hero-cta {
        flex-direction: column;
        width: 100%;
    }

    .hero-cta .btn {
        width: 100%;
        justify-content: center;
    }

    .phone-frame {
        width: 280px;
        height: 560px;
    }
}

/* ========== 性能优化 ========== */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        transition-duration: 0.01ms !important;
    }

    .reveal {
        opacity: 1;
        transform: none;
    }
}

/* ========== Evia 交互对话框（与演示同板块） ========== */
.evia-demo .evia-chat-box {
    max-width: 100%;
    margin: 0;
    display: flex;
    flex-direction: column;
}

.evia-chat-box {
    max-width: 720px;
    margin: 0 auto;
    background: rgba(255, 255, 255, 0.85);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-2xl);
    overflow: hidden;
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    box-shadow: 0 16px 64px rgba(8, 21, 24, 0.10), 0 0 40px rgba(142, 229, 223, 0.12);
    position: relative;
    z-index: 1;
}

.chat-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 20px 24px;
    background: linear-gradient(90deg, rgba(0, 107, 116, 0.10), rgba(142, 229, 223, 0.12), rgba(1, 254, 239, 0.06));
    border-bottom: 1px solid var(--border-subtle);
}

.chat-header-left {
    display: flex;
    align-items: center;
    gap: 12px;
}

.chat-header-avatar {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: var(--gradient-depth);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    font-weight: var(--weight-bold);
    color: var(--text-on-primary);
    box-shadow: 0 4px 16px rgba(142, 229, 223, 0.4);
    overflow: hidden;
    padding: 0;
}

.chat-header-avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 50%;
    display: block;
}

.chat-header-name {
    font-size: var(--text-lg);
    font-weight: var(--weight-bold);
    color: var(--text-primary);
}

.chat-header-status {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: var(--text-xs);
    color: var(--text-tertiary);
}

.status-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: #00C853;
    box-shadow: 0 0 8px rgba(0, 200, 83, 0.5);
    animation: dot-blink 2s ease-in-out infinite;
}

.chat-header-tag {
    font-size: 10px;
    font-weight: var(--weight-bold);
    letter-spacing: var(--tracking-wider);
    padding: 4px 12px;
    border-radius: var(--radius-full);
    background: var(--color-primary-dim);
    color: var(--text-brand);
    border: 1px solid var(--border-brand);
}

.chat-body {
    height: 360px;
    overflow-y: auto;
    padding: 24px;
    display: flex;
    flex-direction: column;
    gap: 16px;
    scroll-behavior: smooth;
}

.chat-body::-webkit-scrollbar {
    width: 4px;
}

.chat-body::-webkit-scrollbar-thumb {
    background: rgba(142, 229, 223, 0.3);
    border-radius: 2px;
}

.chat-message {
    display: flex;
    gap: 10px;
    align-items: flex-start;
    max-width: 85%;
    animation: chat-msg-in 0.4s ease-out;
}

@keyframes chat-msg-in {
    from { opacity: 0; transform: translateY(12px); }
    to { opacity: 1; transform: translateY(0); }
}

.chat-message-ai {
    align-self: flex-start;
}

.chat-message-user {
    align-self: flex-end;
    flex-direction: row-reverse;
}

.chat-message-avatar {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: var(--gradient-depth);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 13px;
    font-weight: var(--weight-bold);
    color: var(--text-on-primary);
    flex-shrink: 0;
    box-shadow: 0 2px 8px rgba(142, 229, 223, 0.3);
    overflow: hidden;
    padding: 0;
}

.chat-message-avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 50%;
    display: block;
}

.chat-message-user .chat-message-avatar {
    display: none;
}

.chat-message-text {
    padding: 12px 16px;
    border-radius: 16px;
    font-size: var(--text-sm);
    line-height: var(--leading-relaxed);
}

.chat-message-ai .chat-message-text {
    background: linear-gradient(135deg, #FFFFFF 0%, var(--color-cyan-50) 45%, var(--color-cyan-100) 100%);
    border: 1px solid rgba(142, 229, 223, 0.28);
    border-top-left-radius: 4px;
    color: var(--text-secondary);
    box-shadow: var(--shadow-sm);
}

.chat-message-user .chat-message-text {
    background: var(--gradient-depth);
    color: var(--text-on-primary);
    font-weight: var(--weight-medium);
    border-top-right-radius: 4px;
    box-shadow: 0 4px 16px rgba(142, 229, 223, 0.25);
}

/* 正在输入动画 */
.chat-typing {
    display: flex;
    gap: 4px;
    padding: 14px 18px;
    background: linear-gradient(135deg, #FFFFFF 0%, var(--color-cyan-50) 45%, var(--color-cyan-100) 100%);
    border: 1px solid rgba(142, 229, 223, 0.28);
    border-radius: 16px;
    border-top-left-radius: 4px;
    align-self: flex-start;
    max-width: 85%;
}

.chat-typing-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--color-cyan-600);
    animation: typing-bounce 1.4s ease-in-out infinite;
}

.chat-typing-dot:nth-child(2) { animation-delay: 0.2s; }
.chat-typing-dot:nth-child(3) { animation-delay: 0.4s; }

@keyframes typing-bounce {
    0%, 60%, 100% { transform: translateY(0); opacity: 0.4; }
    30% { transform: translateY(-6px); opacity: 1; }
}

/* 建议问题 */
.chat-suggestions {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    padding: 16px 24px;
    border-top: 1px solid var(--border-subtle);
    background: rgba(248, 255, 254, 0.6);
}

.chat-suggestion {
    font-size: var(--text-xs);
    padding: 8px 16px;
    background: rgba(255, 255, 255, 0.7);
    border: 1px solid var(--border-brand);
    border-radius: var(--radius-full);
    color: var(--text-brand);
    cursor: pointer;
    transition: all var(--transition-base);
    font-family: inherit;
    white-space: nowrap;
}

.chat-suggestion:hover {
    background: var(--color-primary-dim);
    border-color: var(--color-cyan-600);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(142, 229, 223, 0.2);
}

/* 输入区域 */
.chat-input-area {
    display: flex;
    gap: 12px;
    padding: 16px 24px 20px;
    border-top: 1px solid var(--border-subtle);
    background: rgba(255, 255, 255, 0.5);
}

.chat-input {
    flex: 1;
    padding: 12px 20px;
    font-size: var(--text-sm);
    font-family: inherit;
    background: rgba(255, 255, 255, 0.8);
    border: 1px solid var(--border-default);
    border-radius: var(--radius-full);
    color: var(--text-primary);
    outline: none;
    transition: all var(--transition-base);
}

.chat-input::placeholder {
    color: var(--text-quaternary);
}

.chat-input:focus {
    border-color: var(--color-cyan-600);
    background: rgba(255, 255, 255, 1);
    box-shadow: 0 0 0 3px rgba(142, 229, 223, 0.15);
}

.chat-send-btn {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: var(--gradient-depth);
    color: var(--text-on-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    cursor: pointer;
    transition: all var(--transition-base);
    box-shadow: 0 4px 16px rgba(142, 229, 223, 0.3);
}

.chat-send-btn:hover {
    transform: scale(1.08);
    box-shadow: 0 6px 20px rgba(1, 254, 239, 0.35);
}

.chat-send-btn:active {
    transform: scale(0.95);
}

/* 响应式 */
@media (max-width: 768px) {
    .evia-chat-box,
    .evia-demo .evia-chat-box {
        max-width: 100%;
    }

    .chat-body {
        height: 260px;
    }

    .chat-header-tag {
        display: none;
    }

    .chat-suggestions {
        overflow-x: auto;
        overflow-y: hidden;
        flex-wrap: nowrap;
        padding: 12px 16px;
        max-width: 100%;
        overscroll-behavior-x: contain;
        -webkit-overflow-scrolling: touch;
    }

    .chat-suggestion {
        flex-shrink: 0;
    }

    .evia-chat-box,
    .partner-logos {
        max-width: 100%;
    }
}