/* ============================================
   DOZZON · 道中创新 — Premium Light Redesign v9
   亮色主题 · 精致配色 · 高级质感 · 微交互动效
   ============================================ */
:root {
    /* —— 深色基底：深空午夜蓝黑（赛博朋克主调）—— */
    --bg-primary: #070b14;          /* 主背景 深空黑 */
    --bg-secondary: #0b1120;        /* 区块深色 */
    --bg-card: rgba(18,26,44,0.55); /* 玻璃卡片 */
    --bg-card-solid: #0e1626;       /* 实体卡片 */
    --bg-card-hover: rgba(26,37,60,0.72);
    --bg-input: rgba(9,15,27,0.72);
    --bg-overlay: rgba(4,7,14,0.74);
    --bg-dark: #05080f;             /* 仅用于 toast 等浮层 */

    /* —— 文字（冷白 + 霓虹蓝调，强对比）—— */
    --text-primary: #eaf2ff;
    --text-secondary: rgba(165,182,216,0.82);
    --text-muted: rgba(140,156,192,0.64);
    --text-dim: rgba(118,134,170,0.42);

    /* —— 几何描边（霓虹青微光）—— */
    --border: rgba(110,160,220,0.13);
    --border-hover: rgba(80,200,255,0.34);
    --border-active: rgba(45,226,230,0.55);
    --line: rgba(110,160,220,0.16);
    --line-soft: rgba(110,160,220,0.07);

    /* —— 主色：霓虹青（信号色，高对比荧光）—— */
    --accent: #25e6e6;
    --accent-2: #4d7cff;
    --accent-strong: #00b8c4;
    --accent-soft: rgba(45,226,230,0.09);
    --accent-glow: rgba(45,226,230,0.34);
    --accent-teal: #2de2e6;
    --accent-teal-soft: rgba(45,226,230,0.11);

    /* —— 霓虹光谱（赛博朋克点缀：青/蓝/紫/品红）—— */
    --neon-cyan: #2de2e6;
    --neon-blue: #4d7cff;
    --neon-purple: #b14dff;
    --neon-magenta: #ff2fd0;
    --neon-pink: #ff3d7f;
    --neon-gradient: linear-gradient(120deg, var(--neon-cyan) 0%, var(--neon-blue) 45%, var(--neon-purple) 78%, var(--neon-magenta) 100%);
    --neon-holographic: linear-gradient(135deg, #2de2e6 0%, #4d7cff 25%, #b14dff 55%, #ff2fd0 80%, #2de2e6 100%);

    /* —— 原工业金属令牌，此处重映射为霓虹全息（保持组件兼容性）—— */
    --brass: #2de2e6;               /* 重映射：霓虹青 */
    --brass-light: #7ff0f2;
    --steel: #8fd6ff;              /* 重映射：冷光银蓝 */
    --steel-light: #c3e6ff;
    --metal-gradient: linear-gradient(135deg,#0f1c30 0%,#1b3a52 26%,#133a44 50%,#23304f 72%,#0f2236 100%);
    --brass-gradient: var(--neon-gradient);
    --metal-frame: var(--neon-holographic);

    /* —— 轻奢点缀：霓虹金紫 —— */
    --gold: #ffd36b;
    --gold-soft: rgba(255,211,107,0.12);
    --gold-glow: rgba(255,211,107,0.30);

    /* —— 语义色（霓虹化）—— */
    --purple: #b14dff;
    --purple-glow: rgba(177,77,255,0.22);
    --green: #2bf5a8;
    --green-soft: rgba(43,245,168,0.10);
    --amber: #ffb13d;
    --amber-soft: rgba(255,177,61,0.10);
    --red: #ff4d6d;
    --red-soft: rgba(255,77,109,0.10);

    /* —— 圆角 —— */
    --radius-sm: 7px; --radius: 11px; --radius-lg: 15px; --radius-xl: 20px; --radius-2xl: 26px;

    /* —— 缓动 —— */
    --ease-out: cubic-bezier(0.16,1,0.3,1);
    --ease-in-out: cubic-bezier(0.65,0,0.35,1);
    --spring: cubic-bezier(0.34,1.56,0.64,1);
    --transition: 0.32s var(--ease-out);
    --transition-fast: 0.16s var(--ease-out);

    /* —— 分层阴影（深空 + 霓虹辉光）—— */
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.40), 0 1px 3px rgba(0,0,0,0.30);
    --shadow-md: 0 4px 14px rgba(0,0,0,0.45), 0 2px 5px rgba(0,0,0,0.30);
    --shadow-lg: 0 18px 46px rgba(0,0,0,0.55), 0 6px 18px rgba(45,226,230,0.06);
    --shadow-xl: 0 32px 72px rgba(0,0,0,0.60), 0 12px 30px rgba(45,226,230,0.08);

    /* —— 蓝图网格（霓虹青极淡线，精密结构感）—— */
    --grid-line: rgba(45,226,230,0.05);
    --grid-size: 76px;
    --grid: linear-gradient(var(--grid-line) 1px, transparent 1px) 0 0/var(--grid-size) var(--grid-size), linear-gradient(90deg, var(--grid-line) 1px, transparent 1px) 0 0/var(--grid-size) var(--grid-size);

    --max-width: 1320px;
    --nav-height: 54px;

    /* —— 玻璃拟态 (Glassmorphism, 深空霓虹磨砂) —— */
    --glass-bg: rgba(18,26,44,0.45);
    --glass-bg-strong: rgba(12,20,36,0.80);
    --glass-border: rgba(120,180,255,0.16);
    --glass-shadow: 0 10px 40px rgba(0,0,0,0.45), 0 2px 10px rgba(45,226,230,0.05);
    --glass-blur: blur(22px) saturate(150%);

    /* —— 视差/光影变量 (由 JS 注入) —— */
    --scroll: 0; --mx: 0; --my: 0;
}

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: calc(var(--nav-height) + 20px);
    background: var(--bg-primary);
    -webkit-text-size-adjust: 100%;
}
html.js-loading { opacity: 0; }
html.js-ready { opacity: 1; transition: opacity 0.5s ease; }

body {
    font-family: -apple-system, BlinkMacSystemFont, 'SF Pro Display', 'Segoe UI', 'PingFang SC', 'HarmonyOS Sans', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
    color: var(--text-primary);
    background:
        radial-gradient(1200px 640px at 86% -10%, rgba(45,226,230,0.10), transparent 58%),
        radial-gradient(920px 560px at -8% 10%, rgba(177,77,255,0.09), transparent 55%),
        var(--bg-primary);
    background-attachment: fixed;
    line-height: 1.62; letter-spacing: -0.011em;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-rendering: optimizeLegibility;
    -webkit-tap-highlight-color: transparent;
    touch-action: manipulation;
    scrollbar-width: thin;
    scrollbar-color: rgba(45,226,230,0.32) transparent;
}

::selection { background: rgba(45,226,230,0.30); color: var(--text-primary); }
::-moz-selection { background: rgba(45,226,230,0.30); color: var(--text-primary); }
::-webkit-scrollbar { width: 8px; height: 8px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: rgba(45,226,230,0.32); border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: rgba(45,226,230,0.55); }

a { text-decoration: none; color: inherit; }
ul { list-style: none; }
img { max-width: 100%; display: block; height: auto; }

.skip-link {
    position: absolute; top: -100px; left: 16px;
    padding: 12px 20px; background: var(--accent); color: #fff;
    font-size: 14px; font-weight: 600; border-radius: 0 0 10px 10px; z-index: 10002;
    transition: top 0.3s var(--spring);
}
.skip-link:focus { top: 0; outline: 2px solid var(--accent); outline-offset: 2px; }

.container { max-width: var(--max-width); margin: 0 auto; padding: 0 56px; }

/* ==================== NAVIGATION ==================== */
.navbar {
    position: fixed; top: 0; left: 0; right: 0;
    height: var(--nav-height);
    padding-top: env(safe-area-inset-top);
    padding-left: env(safe-area-inset-left);
    padding-right: env(safe-area-inset-right);
    background: rgba(8,13,24,0.72);
    backdrop-filter: saturate(180%) blur(26px);
    -webkit-backdrop-filter: saturate(180%) blur(26px);
    z-index: 1000;
    border-bottom: 1px solid var(--border);
    transition: 0.35s var(--ease-out);
}
.navbar.scrolled {
    background: rgba(8,13,24,0.90);
    box-shadow: 0 1px 0 var(--border), 0 8px 30px rgba(0,0,0,0.5), 0 1px 12px rgba(45,226,230,0.10);
}

.scroll-progress {
    position: fixed; top: 0; left: 0;
    height: 2.5px;
    background: var(--metal-frame);
    z-index: 1001; width: 0%;
    pointer-events: none; border-radius: 0 1.5px 1.5px 0;
}

.nav-container { max-width: var(--max-width); margin: 0 auto; padding: 0 56px; height: 100%; display: flex; align-items: center; justify-content: space-between; }
.nav-logo { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 17px; color: var(--text-primary); letter-spacing: -0.4px; background: linear-gradient(120deg, var(--text-primary), var(--accent)); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; }
.nav-logo-img { height: 30px; width: auto; display: block; border-radius: 7px; }
.footer-logo-img { height: 34px; opacity: 0.95; border-radius: 8px; }
.nav-links { display: flex; gap: 2px; align-items: center; }
.nav-link { padding: 7px 13px; font-size: 12.5px; font-weight: 500; color: var(--text-muted); border-radius: 8px; transition: 0.2s ease; letter-spacing: -0.1px; cursor: pointer; position: relative; }
.nav-link::after { content: ''; position: absolute; bottom: -1px; left: 50%; transform: translateX(-50%) scaleX(0); width: 18px; height: 2px; border-radius: 2px; background: linear-gradient(90deg, var(--accent), var(--gold)); transition: transform 0.3s var(--spring); pointer-events: none; }
.nav-link:hover::after, .nav-link.active::after { transform: translateX(-50%) scaleX(1); }
.nav-link:hover { color: var(--text-primary); }
.nav-link.active { color: var(--accent); font-weight: 600; }
.nav-right { display: flex; align-items: center; gap: 14px; }

.nav-dropdown { position: relative; }
.nav-dropdown-trigger { display: flex; align-items: center; gap: 4px; }
.nav-dropdown-trigger svg { width: 14px; height: 14px; color: var(--text-muted); transition: transform 0.3s var(--spring); }
.nav-dropdown:hover .nav-dropdown-trigger svg { transform: rotate(180deg); color: var(--accent); }
.nav-dropdown-menu {
    position: absolute; top: calc(100% + 10px); left: 50%;
    transform: translateX(-50%) translateY(-8px) scale(0.96);
    background: rgba(12,20,36,0.94);
    backdrop-filter: blur(40px); -webkit-backdrop-filter: blur(40px);
    border-radius: var(--radius-lg); border: 1px solid var(--border);
    padding: 8px; min-width: 290px;
    opacity: 0; visibility: hidden;
    transition: 0.25s ease, transform 0.4s var(--spring);
    z-index: 100; transform-origin: top center;
    box-shadow: var(--shadow-xl);
    overflow: hidden;
}
.nav-dropdown:hover .nav-dropdown-menu { opacity: 1; visibility: visible; transform: translateX(-50%) translateY(0) scale(1); }
.nav-dropdown-inner { display: flex; flex-direction: column; gap: 2px; }
.nav-dropdown-item {
    display: flex; align-items: center; gap: 12px; padding: 11px 13px; border-radius: 10px;
    color: var(--text-secondary); transition: 0.25s var(--ease-out); position: relative; overflow: hidden;
}
.nav-dropdown-item:hover { background: var(--accent-soft); color: var(--text-primary); transform: translateX(3px); }
.nav-dropdown-item-icon { width: 22px; height: 22px; color: var(--text-dim); flex-shrink: 0; transition: 0.4s var(--spring); }
.nav-dropdown-item:hover .nav-dropdown-item-icon { color: var(--accent); transform: scale(1.12); }
.nav-dropdown-item-text { display: flex; flex-direction: column; gap: 2px; }
.nav-dropdown-item-text strong { font-size: 13px; font-weight: 600; }
.nav-dropdown-item-text span { font-size: 11px; color: var(--text-muted); }
.nav-mobile-btn { display: none; align-items: center; justify-content: center; background: none; border: none; color: var(--text-primary); cursor: pointer; padding: 8px; z-index: 1001; }

.lang-switcher { position: relative; }
.lang-current { display: flex; align-items: center; gap: 4px; font-size: 12.5px; font-weight: 600; color: var(--text-secondary); cursor: pointer; padding: 7px 10px; border-radius: 8px; transition: 0.16s var(--ease-out); letter-spacing: 0.5px; }
.lang-current svg { transition: transform 0.35s var(--spring); }
.lang-switcher:hover .lang-current svg { transform: rotate(180deg); }
.lang-current:hover { background: rgba(255,255,255,0.08); color: var(--text-primary); }
.lang-dropdown { position: absolute; top: calc(100% + 10px); right: 0; background: rgba(12,20,36,0.96); backdrop-filter: blur(24px); -webkit-backdrop-filter: blur(24px); border-radius: var(--radius); border: 1px solid var(--border); padding: 5px; min-width: 124px; opacity: 0; visibility: hidden; transform: translateY(-8px) scale(0.96); transition: 0.25s ease, transform 0.4s var(--spring); z-index: 100; box-shadow: var(--shadow-lg); }
.lang-switcher:hover .lang-dropdown { opacity: 1; visibility: visible; transform: translateY(0) scale(1); }
.lang-item { display: block; width: 100%; padding: 9px 15px; font-size: 12.5px; border-radius: 8px; color: var(--text-secondary); background: none; border: none; cursor: pointer; text-align: left; font-family: inherit; transition: 0.16s var(--ease-out); }
.lang-item:hover, .lang-item.active { background: rgba(255,255,255,0.06); color: var(--text-primary); }

.nav-phone { display: flex; align-items: center; gap: 6px; font-size: 12.5px; font-weight: 600; color: var(--text-secondary); padding: 8px 16px; border-radius: 20px; border: 1px solid var(--border); transition: 0.18s var(--ease-out); }
.nav-phone:hover { background: linear-gradient(135deg, var(--accent), var(--accent-2)); color: #fff; border-color: transparent; transform: translateY(-1px); box-shadow: 0 4px 16px var(--accent-glow); }

/* ==================== HERO ==================== */
.hero {
    min-height: 100vh; display: flex; align-items: center;
    padding: 124px 0 104px;
    background: var(--grid) 0 0/var(--grid-size) var(--grid-size), radial-gradient(1200px 620px at 82% -8%, rgba(45,226,230,0.18), transparent 58%), radial-gradient(900px 560px at 8% 12%, rgba(177,77,255,0.15), transparent 55%), linear-gradient(178deg, #0a1020 0%, #070b14 50%, #0a0f1e 100%);
    position: relative; overflow: hidden;
}
.hero::before {
    content: ''; position: absolute; top: -45%; right: -22%;
    width: 72%; height: 190%;
    background:
        radial-gradient(ellipse at 55% 38%, rgba(45,226,230,0.22) 0%, rgba(77,124,255,0.10) 38%, transparent 66%),
        radial-gradient(ellipse at 20% 80%, rgba(177,77,255,0.16) 0%, transparent 55%);
    pointer-events: none;
    transform: translate3d(calc(var(--mx,0) * 28px), calc(var(--scroll,0) * 0.05px), 0);
    will-change: transform;
}
.hero::after {
    content: ''; position: absolute; top: 6%; left: -20%;
    width: 56%; height: 120%;
    background:
        radial-gradient(ellipse at 50% 50%, rgba(255,45,208,0.16) 0%, rgba(177,77,255,0.10) 42%, transparent 70%);
    pointer-events: none;
    transform: translate3d(calc(var(--mx,0) * -36px), calc(var(--scroll,0) * -0.04px), 0);
    will-change: transform;
}
.hero-fade-bar {
    position: absolute; bottom: 0; left: 0; right: 0; height: 120px;
    background: linear-gradient(180deg, transparent 0%, var(--bg-primary) 100%);
    pointer-events: none; z-index: 2;
}
.hero .container { display: grid; grid-template-columns: 1fr 1.18fr; gap: 88px; align-items: center; position: relative; z-index: 1; max-width: 1440px; }

.hero-badge {
    display: inline-flex; align-items: center; gap: 9px;
    font-size: 12px; font-weight: 600; color: var(--accent);
    text-transform: uppercase; letter-spacing: 0.08em;
    margin-bottom: 22px; padding: 7px 15px 7px 13px;
    background: var(--accent-soft); border: 1px solid rgba(45,226,230,0.22); border-radius: 100px;
    opacity: 0; transform: translateY(16px);
    animation: heroFadeUp 0.6s var(--ease-out) 0.12s forwards;
}
.hero-badge::before { content: ''; width: 7px; height: 7px; border-radius: 50%; background: linear-gradient(135deg, var(--accent), var(--gold)); box-shadow: 0 0 0 3px rgba(45,226,230,0.18); }
.hero-badge:hover { transform: translateY(-1px); }

.hero-title {
    font-size: clamp(46px,5.8vw,72px); font-weight: 750; line-height: 1.04;
    letter-spacing: -0.03em; color: var(--text-primary); margin-bottom: 18px;
    opacity: 0; transform: translateY(20px);
    animation: heroFadeUp 0.7s var(--ease-out) 0.2s forwards;
    text-wrap: balance;
}
.hero-title em { font-style: normal; background: linear-gradient(120deg, var(--accent) 0%, var(--accent-2) 55%, var(--accent-teal) 100%); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; filter: drop-shadow(0 0 20px rgba(45,226,230,0.30)); }
.hero-title .word { display: inline-block; opacity: 0; transform: translateY(16px); animation: wordFadeUp 0.6s var(--ease-out) forwards; }
@keyframes wordFadeUp { to { opacity: 1; transform: translateY(0); } }

.hero-desc { font-size: 16.5px; color: var(--text-secondary); line-height: 1.75; margin-bottom: 38px; max-width: 470px; opacity: 0; transform: translateY(16px); animation: heroFadeUp 0.6s var(--ease-out) 0.35s forwards; }
.hero-buttons { display: flex; gap: 12px; flex-wrap: wrap; opacity: 0; transform: translateY(16px); animation: heroFadeUp 0.6s var(--ease-out) 0.48s forwards; }

.btn {
    display: inline-flex; align-items: center; gap: 8px;
    font-size: 13.5px; font-weight: 600; padding: 13px 27px; border-radius: 22px;
    border: none; cursor: pointer; transition: all 0.3s var(--spring); letter-spacing: -0.01em; box-shadow: inset 0 1px 0 rgba(255,255,255,0.45);
    font-family: inherit; white-space: nowrap; position: relative; overflow: hidden; min-height: 46px;
}
.btn > * { position: relative; z-index: 1; }
.btn::after { content:''; position:absolute; top:0; left:-130%; width:55%; height:100%; background: linear-gradient(100deg, transparent, rgba(255,255,255,0.4), transparent); transform: skewX(-20deg); transition: left 0.6s ease; z-index:0; pointer-events:none; }
.btn:hover::after { left: 140%; }
.btn:active { transform: scale(0.96); }
.btn-primary { background: linear-gradient(135deg, var(--accent) 0%, var(--accent-2) 100%); color: #fff; box-shadow: 0 6px 18px var(--accent-glow), inset 0 1px 0 rgba(255,255,255,0.35); }
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 12px 30px var(--accent-glow); filter: brightness(1.04); }
.btn-outline { background: transparent; color: var(--text-primary); border: 1px solid var(--border-hover); }
.btn-outline:hover { border-color: var(--accent); background: var(--accent-soft); box-shadow: 0 2px 14px rgba(45,226,230,0.12); transform: translateY(-1px); }
.btn-wechat { background: transparent; color: #059669; border: 1px solid rgba(5,150,105,0.25); }
.btn-wechat:hover { background: var(--green-soft); border-color: #2bf5a8; transform: translateY(-1px); box-shadow: 0 2px 14px rgba(43,245,168,0.18); }
.btn-success { background: var(--green) !important; color: #fff !important; border-color: var(--green) !important; }

.hero-visual { position: relative; display: flex; align-items: center; justify-content: center; transform: perspective(1100px) rotateY(calc(var(--mx,0) * 5deg)) rotateX(calc(var(--my,0) * -5deg)); transition: transform 0.3s var(--ease-out); will-change: transform; }
.hero-visual::after { content:''; position:absolute; z-index:0; width:118%; height:118%; top:50%; left:50%; transform:translate(-50%,-50%); background: radial-gradient(closest-side, rgba(45,226,230,0.22), rgba(177,77,255,0.10) 55%, transparent 72%); filter: blur(18px); pointer-events:none; }
.hero-image-wrapper {
    position: relative; width: 100%; max-width: 620px; aspect-ratio: 4/5;
    background: var(--bg-card); border-radius: calc(var(--radius-2xl) + 4px); overflow: hidden;
    border: 1px solid rgba(45,226,230,0.28);
    box-shadow: var(--shadow-xl), 0 0 60px rgba(45,226,230,0.18), 0 0 120px rgba(177,77,255,0.12);
    animation: heroFloat 6s ease-in-out infinite;
}
@supports not (aspect-ratio:4/5) { .hero-image-wrapper{height:0;padding-bottom:125%} .hero-image-wrapper img{position:absolute;inset:0;width:100%;height:100%} }
.hero-image-wrapper img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.7s var(--ease-out); }
.hero-image-wrapper:hover img { transform: scale(1.04); }
.hero-image-wrapper::before { content:''; position:absolute; inset:20px; z-index:4; pointer-events:none; filter: drop-shadow(0 0 6px rgba(45,226,230,0.5)); background:
    linear-gradient(var(--accent),var(--accent)) 0 0/22px 3px no-repeat, linear-gradient(var(--accent),var(--accent)) 0 0/3px 22px no-repeat,
    linear-gradient(var(--accent),var(--accent)) 100% 0/22px 3px no-repeat, linear-gradient(var(--accent),var(--accent)) 100% 0/3px 22px no-repeat,
    linear-gradient(var(--accent),var(--accent)) 100% 100%/22px 3px no-repeat, linear-gradient(var(--accent),var(--accent)) 100% 100%/3px 22px no-repeat,
    linear-gradient(var(--accent),var(--accent)) 0 100%/22px 3px no-repeat, linear-gradient(var(--accent),var(--accent)) 0 100%/3px 22px no-repeat; }
.hero-image-wrapper::after { content:''; position:absolute; inset:0; border-radius:inherit; padding:2px; background: var(--metal-frame); -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0); -webkit-mask-composite: xor; mask-composite: exclude; pointer-events:none; }
@keyframes heroFloat { 0%,100%{transform:translateY(0)} 50%{transform:translateY(-12px)} }

.hero-stats { display: flex; gap: 52px; margin-top: 50px; padding-top: 30px; border-top: 1px solid var(--border); opacity: 0; transform: translateY(16px); animation: heroFadeUp 0.6s var(--ease-out) 0.6s forwards; }
@keyframes heroFadeUp { from{opacity:0;transform:translateY(16px)} to{opacity:1;transform:translateY(0)} }
.hero-stat-number { font-size: 38px; font-weight: 750; background: linear-gradient(120deg, var(--steel) 0%, var(--brass) 55%, var(--steel) 100%); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; letter-spacing: -1px; line-height: 1; font-variant-numeric: tabular-nums; }
.hero-stat-label { font-size: 11.5px; color: var(--text-muted); margin-top: 7px; font-weight: 500; }

/* ==================== SECTIONS ==================== */
main { counter-reset: sec; }
.products-section, .solutions-section, .about-section, .contact-section, .news-section, .video-showcase-section { position: relative; z-index: 1; }
.products-section, .solutions-section, .about-section, .contact-section { padding: 112px 0; }
.products-section { background: var(--bg-primary); }
.solutions-section { background: var(--grid), var(--bg-secondary); }
.about-section { background: var(--grid), var(--bg-primary); }
.contact-section { background: var(--grid), var(--bg-secondary); }

.section-header { text-align: center; margin-bottom: 60px; opacity: 0; transform: translateY(16px); transition: all 0.5s var(--ease-out); counter-increment: sec; }
.section-header.visible { opacity: 1; transform: translateY(0); }
.section-tag { font-size: 11px; font-weight: 700; letter-spacing: 0.2em; text-transform: uppercase; color: var(--accent); margin-bottom: 16px; display: inline-flex; align-items: center; gap: 9px; }
.section-tag::before { content: counter(sec, decimal-leading-zero); font-family: 'SF Mono','Consolas',ui-monospace,monospace; font-size: 10px; font-weight: 600; letter-spacing: 0.06em; color: var(--brass); padding: 2px 7px; margin-right: 2px; border: 1px solid var(--line); border-radius: 4px; background: var(--bg-card); box-shadow: 0 1px 2px rgba(0,0,0,0.5); }
.section-tag::after { content: ''; display: block; width: 26px; height: 2px; border-radius: 2px; background: linear-gradient(90deg, var(--accent), var(--gold)); transition: width 0.4s var(--spring); }
.section-header:hover .section-tag::after { width: 40px; }
.section-title { font-size: clamp(30px,3.6vw,44px); font-weight: 750; letter-spacing: -0.025em; line-height: 1.12; color: var(--text-primary); margin-bottom: 14px; text-wrap: balance; }
.section-subtitle { font-size: 15.5px; color: var(--text-secondary); max-width: 540px; margin: 0 auto; line-height: 1.7; }

/* 板块装饰光晕（极淡，置于内容之下，破除单调） */
.products-section::before, .contact-section::before { content:''; position:absolute; top:-12%; right:-10%; width:42%; height:62%; background: radial-gradient(ellipse at center, rgba(45,226,230,0.10), transparent 66%); pointer-events:none; z-index:-1; transform: translateY(calc(var(--scroll,0) * 0.03px)); will-change: transform; }
.solutions-section::before, .news-section::before { content:''; position:absolute; top:-6%; left:-12%; width:44%; height:64%; background: radial-gradient(ellipse at center, rgba(177,77,255,0.10), transparent 66%); pointer-events:none; z-index:-1; transform: translateY(calc(var(--scroll,0) * -0.025px)); will-change: transform; }
.about-section::before { content:''; position:absolute; top:-6%; left:50%; width:62%; height:54%; background: radial-gradient(ellipse at center, rgba(255,45,208,0.08), transparent 66%); pointer-events:none; z-index:-1; transform: translateX(-50%) translateY(calc(var(--scroll,0) * 0.02px)); will-change: transform; }

/* ==================== PRODUCTS GRID ==================== */
.products-grid { display: grid; grid-template-columns: repeat(4,1fr); gap: 18px; }
.product-card {
    background: var(--bg-card); border-radius: var(--radius-xl); overflow: hidden;
    border: 1px solid var(--border); transition: all 0.45s var(--spring); position: relative;
    opacity: 0; transform: translateY(24px);
    box-shadow: var(--shadow-sm);
}
.product-card.visible { opacity: 1; transform: translateY(0); }
.product-card:hover { border-color: transparent; transform: translateY(-6px); box-shadow: var(--shadow-lg); z-index: 2; }
.product-card::before {
    content: ''; position: absolute; inset: 0; border-radius: inherit;
    background: linear-gradient(105deg, transparent 33%, rgba(45,226,230,0.07) 40%, rgba(45,226,230,0.07) 42%, transparent 47%);
    transform: translateX(-100%); transition: transform 0.7s var(--ease-out); pointer-events: none; z-index: 1;
}
.product-card:hover::before { transform: translateX(100%); }
.product-card::after {
    content:''; position:absolute; inset:0; border-radius:inherit; padding:1px;
    background: var(--metal-frame);
    -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
    -webkit-mask-composite: xor; mask-composite: exclude;
    opacity:0; transition: opacity 0.4s var(--ease-out); pointer-events:none; z-index:3;
}
.product-card:hover::after { opacity: 1; }
.product-card-link { display: flex; flex-direction: column; color: inherit; height: 100%; outline: none; position: relative; z-index: 2; }
.product-card-link:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: var(--radius-xl); }
.product-card-image { aspect-ratio: 1/1; background: var(--bg-secondary); overflow: hidden; position: relative; }
@supports not (aspect-ratio:1/1) { .product-card-image{height:0;padding-bottom:100%} .product-card-image img{position:absolute;inset:0;width:100%;height:100%} }
.product-card-image img { width:100%; height:100%; object-fit:cover; transition: transform 0.7s var(--ease-out); }
.product-card:hover .product-card-image img { transform: scale(1.05); }
.product-card-tag { position: absolute; top: 12px; left: 12px; padding: 4px 11px; background: rgba(12,20,36,0.82); backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px); border-radius: 12px; font-size: 10px; font-weight: 700; color: var(--text-secondary); z-index: 4; letter-spacing: 0.3px; box-shadow: var(--shadow-sm); }
.tag-flagship{color:var(--accent)} .tag-hot{color:var(--red)} .tag-new{color:var(--green)} .tag-classic{color:#6b7280} .tag-health{color:var(--green)} .tag-retail{color:var(--accent-teal)} .tag-entertainment{color:var(--amber)}

.product-card-body { padding: 18px 18px 20px; flex: 1; display: flex; flex-direction: column; justify-content: space-between; }
.product-card-name { font-size: 14.5px; font-weight: 650; color: var(--text-primary); margin-bottom: 3px; letter-spacing: -0.2px; transition: transform 0.28s var(--spring); }
.product-card:hover .product-card-name { transform: translateX(2px); color: var(--accent); }
.product-card-desc { font-size: 11.5px; color: var(--text-dim); line-height: 1.55; margin-bottom: 10px; }
.product-card-footer { display: flex; justify-content: space-between; align-items: center; margin-top: auto; }
.product-card-model { font-size: 9.5px; color: var(--text-dim); font-family: 'SF Mono','Consolas',monospace; opacity: 0; transform: translateX(-6px); transition: 0.3s var(--ease-out); }
.product-card:hover .product-card-model { opacity: 1; transform: translateX(0); color: var(--accent); }
.product-card-arrow { color: var(--text-dim); transition: 0.3s var(--ease-out); }
.product-card:hover .product-card-arrow { color: var(--accent); transform: translateX(3px); }

.product-card:nth-child(1){transition-delay:0s} .product-card:nth-child(2){transition-delay:.06s} .product-card:nth-child(3){transition-delay:.12s} .product-card:nth-child(4){transition-delay:.18s} .product-card:nth-child(5){transition-delay:.06s} .product-card:nth-child(6){transition-delay:.12s} .product-card:nth-child(7){transition-delay:.18s} .product-card:nth-child(8){transition-delay:.24s}

/* ==================== SOLUTIONS ==================== */
.solutions-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 18px; }
.solution-card {
    background: var(--glass-bg); backdrop-filter: var(--glass-blur); -webkit-backdrop-filter: var(--glass-blur);
    border-radius: var(--radius-xl); padding: 38px 30px;
    border: 1px solid var(--glass-border); transition: all 0.45s var(--spring);
    opacity: 0; transform: translateY(24px); position: relative; overflow: hidden;
    box-shadow: var(--glass-shadow);
}
.solution-card.visible { opacity: 1; transform: translateY(0); }
.solution-card:hover { border-color: transparent; transform: translateY(-5px); box-shadow: var(--shadow-lg); }
.solution-card::after { content:''; position:absolute; inset:0; border-radius:inherit; padding:1px; background: var(--metal-frame); -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0); -webkit-mask-composite: xor; mask-composite: exclude; opacity:0; transition: opacity 0.4s var(--ease-out); pointer-events:none; z-index:3; }
.solution-card:hover::after { opacity: 1; }
.solution-icon { width: 50px; height: 50px; background: var(--metal-gradient); border-radius: var(--radius); display: flex; align-items: center; justify-content: center; color: var(--neon-cyan); margin-bottom: 22px; transition: 0.45s var(--spring); position: relative; z-index: 1; box-shadow: inset 0 0 0 1px var(--line), inset 0 1px 1px rgba(255,255,255,0.14), 0 2px 6px rgba(0,0,0,0.4); }
.solution-card:hover .solution-icon { background: linear-gradient(135deg, var(--accent), var(--accent-2)); color: #fff; transform: scale(1.06) rotate(-3deg); box-shadow: 0 8px 22px var(--accent-glow); }
.solution-card h3 { font-size: 17.5px; font-weight: 650; margin-bottom: 9px; letter-spacing: -0.01em; transition: transform 0.3s var(--spring); position: relative; z-index: 1; }
.solution-card:hover h3 { transform: translateX(3px); }
.solution-card p { font-size: 13.5px; color: var(--text-muted); line-height: 1.72; position: relative; z-index: 1; }
.solution-card:nth-child(1){transition-delay:0s} .solution-card:nth-child(2){transition-delay:.08s} .solution-card:nth-child(3){transition-delay:.16s} .solution-card:nth-child(4){transition-delay:.08s} .solution-card:nth-child(5){transition-delay:.16s} .solution-card:nth-child(6){transition-delay:.24s}

/* ==================== ABOUT ==================== */
.about-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 68px; align-items: center; }
.about-image { position: relative; border-radius: var(--radius-2xl); overflow: hidden; border: 1px solid var(--border); opacity: 0; transform: translateX(-24px); transition: 0.6s var(--ease-out); box-shadow: var(--shadow-lg); }
.about-image.visible { opacity: 1; transform: translateX(0); }
.about-content { opacity: 0; transform: translateX(24px); transition: 0.6s var(--ease-out) 0.12s; }
.about-content.visible { opacity: 1; transform: translateX(0); }
.about-image-main { width: 100%; aspect-ratio: 4/3; overflow: hidden; }
@supports not (aspect-ratio:4/3) { .about-image-main{height:0;padding-bottom:75%} .about-image-main img{position:absolute;inset:0;width:100%;height:100%} }
.about-image img { width: 100%; object-fit: cover; transition: transform 0.7s var(--ease-out); }
.about-image:hover img { transform: scale(1.05); }
.about-image-badge { position: absolute; bottom: 20px; right: 20px; background: rgba(12,20,36,0.90); backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px); border: 1px solid var(--border); border-radius: var(--radius-lg); padding: 15px 20px; display: flex; flex-direction: column; align-items: center; gap: 3px; transition: transform 0.35s var(--spring); z-index: 2; box-shadow: var(--shadow-md); }
.about-image:hover .about-image-badge { transform: translateY(-5px); }
.about-image-badge-number { font-size: 28px; font-weight: 750; background: linear-gradient(120deg, var(--steel) 0%, var(--brass) 55%, var(--steel) 100%); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; line-height: 1; }
.about-image-badge-text { font-size: 10.5px; color: var(--text-muted); text-align: center; line-height: 1.4; }
.about-content h2 { font-size: 36px; font-weight: 750; margin-bottom: 18px; letter-spacing: -0.02em; text-wrap: balance; }
.about-content > p { font-size: 15.5px; color: var(--text-secondary); line-height: 1.8; margin-bottom: 30px; }
.about-features { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.about-feature { display: flex; align-items: flex-start; gap: 12px; padding: 17px; border-radius: var(--radius); background: var(--bg-card); border: 1px solid var(--border); transition: 0.35s var(--spring); box-shadow: var(--shadow-sm); }
.about-feature:hover { border-color: var(--accent-soft); transform: translateX(3px); box-shadow: var(--shadow-md); }
.about-feature svg { width: 19px; height: 19px; color: var(--accent); flex-shrink: 0; margin-top: 1px; }
.about-feature strong { font-size: 13.5px; font-weight: 650; margin-bottom: 3px; display: block; }
.about-feature-text span { font-size: 11.5px; color: var(--text-muted); }

/* ==================== STATS ==================== */
.stats-section { padding: 100px 0; background: var(--grid), linear-gradient(135deg, #f3f1ea 0%, #eceae3 100%); position: relative; overflow: hidden; }
.stats-section::before { content:''; position:absolute; top:-30%; left:-10%; width:50%; height:160%; background: radial-gradient(ellipse at center, rgba(255,45,208,0.07), transparent 60%); pointer-events:none; }
.stats-grid { display: grid; grid-template-columns: repeat(4,1fr); gap: 36px; position: relative; z-index: 1; }
.stat-item { text-align: center; opacity: 0; transform: translateY(20px); transition: 0.45s var(--ease-out); padding: 20px 14px; margin: -20px -14px; border-radius: var(--radius-lg); }
.stat-item.visible { opacity: 1; transform: translateY(0); }
.stat-item:nth-child(1){transition-delay:0s} .stat-item:nth-child(2){transition-delay:.08s} .stat-item:nth-child(3){transition-delay:.16s} .stat-item:nth-child(4){transition-delay:.24s}
.stat-number { font-size: 50px; font-weight: 750; background: linear-gradient(120deg, var(--steel) 0%, var(--brass) 55%, var(--steel) 100%); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; letter-spacing: -0.03em; line-height: 1; margin-bottom: 9px; font-variant-numeric: tabular-nums; transition: transform 0.4s var(--spring); }
.stat-suffix { font-size: 0.5em; font-weight: 700; margin-left: 3px; color: var(--text-muted); -webkit-text-fill-color: var(--text-muted); background: none; -webkit-background-clip: initial; background-clip: initial; }
.stat-item:hover .stat-number { transform: scale(1.05) translateY(-2px); }
.stat-label { font-size: 13.5px; color: var(--text-muted); font-weight: 500; }

/* Input glow */
.input-glow { box-shadow: 0 0 0 3px var(--accent-soft) !important; border-color: var(--accent) !important; }
.input-filled { border-color: rgba(255,255,255,0.14); }

/* ==================== ADVANTAGES ==================== */
.advantages-section { padding: 88px 0; border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); background: var(--grid), var(--bg-secondary); }
.advantages-grid { display: grid; grid-template-columns: repeat(4,1fr); gap: 1px; background: var(--border); border-radius: var(--radius-xl); overflow: hidden; box-shadow: var(--shadow-sm); }
.advantage-card { padding: 38px 28px; background: rgba(18,26,44,0.50); backdrop-filter: blur(14px) saturate(150%); -webkit-backdrop-filter: blur(14px) saturate(150%); transition: 0.35s var(--spring); position: relative; overflow: hidden; border: 1px solid var(--glass-border); }
.advantage-card:hover { background: rgba(26,37,60,0.72); transform: translateY(-2px); box-shadow: 0 8px 24px rgba(0,0,0,0.5), 0 0 0 1px rgba(45,226,230,0.12); z-index: 2; }
.advantage-number { font-size: 10px; font-weight: 600; letter-spacing: 0.12em; color: var(--text-dim); margin-bottom: 12px; font-variant-numeric: tabular-nums; font-family: 'SF Mono','Consolas',monospace; }
.advantage-card:hover .advantage-number { color: var(--accent); }
.advantage-card h3 { font-size: 16.5px; font-weight: 650; margin-bottom: 7px; letter-spacing: -0.2px; }
.advantage-card p { font-size: 12.5px; color: var(--text-muted); line-height: 1.7; }
.advantage-icon { display: inline-flex; align-items: center; justify-content: center; width: 38px; height: 38px; background: var(--metal-gradient); border-radius: 10px; color: var(--neon-cyan); margin-bottom: 14px; transition: 0.35s var(--spring); box-shadow: inset 0 0 0 1px var(--line), inset 0 1px 1px rgba(255,255,255,0.14); }
.advantage-card:hover .advantage-icon { background: linear-gradient(135deg, var(--accent), var(--accent-2)); color: #fff; transform: scale(1.06); }

/* ==================== CONTACT ==================== */
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: start; }
.contact-form, .contact-info { opacity: 0; transform: translateY(20px); transition: 0.5s var(--ease-out); }
.contact-form.visible, .contact-info.visible { opacity: 1; transform: translateY(0); }
.contact-info { transition-delay: 0.08s; }
.contact-info h2 { font-size: 36px; font-weight: 750; margin-bottom: 14px; letter-spacing: -0.02em; text-wrap: balance; }
.contact-info > p { font-size: 15.5px; color: var(--text-secondary); line-height: 1.75; margin-bottom: 34px; }
.contact-item { display: flex; align-items: flex-start; gap: 15px; margin-bottom: 22px; }
.contact-item-icon { width: 44px; height: 44px; background: var(--metal-gradient); border-radius: var(--radius); display: flex; align-items: center; justify-content: center; color: var(--neon-cyan); border: 1px solid var(--line); flex-shrink: 0; transition: 0.25s var(--spring); box-shadow: inset 0 1px 1px rgba(255,255,255,0.14); }
.contact-item:hover .contact-item-icon { background: linear-gradient(135deg, var(--accent), var(--accent-2)); color: #fff; transform: scale(1.05); box-shadow: 0 6px 18px var(--accent-glow); }
.contact-item h3 { font-size: 13.5px; font-weight: 650; margin-bottom: 3px; }
.contact-item p { font-size: 13.5px; color: var(--text-secondary); }
.contact-wechat { display: flex; align-items: center; gap: 14px; padding: 19px; background: var(--bg-card); border-radius: var(--radius-lg); border: 1px solid var(--border); cursor: pointer; transition: var(--transition); margin-top: 26px; box-shadow: var(--shadow-sm); }
.contact-wechat:hover { border-color: rgba(43,245,168,0.35); transform: translateY(-2px); box-shadow: var(--shadow-md); }

.contact-form { background: var(--glass-bg-strong); backdrop-filter: var(--glass-blur); -webkit-backdrop-filter: var(--glass-blur); border-radius: var(--radius-2xl); padding: 42px; border: 1px solid var(--glass-border); box-shadow: var(--glass-shadow); position: relative; overflow: hidden; }
.contact-form::before { content:''; position:absolute; top:0; left:0; right:0; height:3px; background: var(--metal-frame); }
.contact-form h3 { font-size: 21px; font-weight: 700; margin-bottom: 26px; }
.form-group { margin-bottom: 18px; }
.form-group label { display: block; font-size: 11.5px; font-weight: 600; color: var(--text-muted); margin-bottom: 7px; letter-spacing: 0.01em; }
.form-group:focus-within label { color: var(--accent); }
.form-group input, .form-group select, .form-group textarea { width: 100%; padding: 13px 15px; border: 1px solid var(--border); border-radius: 10px; font-size: 13.5px; font-family: inherit; color: var(--text-primary); background: var(--bg-input); transition: 0.25s var(--ease-out); outline: none; appearance: none; -webkit-appearance: none; }
.form-group input::placeholder, .form-group textarea::placeholder { color: var(--text-dim); }
.form-group input:focus, .form-group select:focus, .form-group textarea:focus { border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-soft); background: rgba(8,13,24,0.9); }
.form-group select { background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='14' height='14' viewBox='0 0 24 24' fill='none' stroke='rgba(165,182,216,0.6)' stroke-width='2'%3E%3Cpolyline points='6 9 12 15 18 9'/%3E%3C/svg%3E"); background-repeat: no-repeat; background-position: right 12px center; padding-right: 36px; cursor: pointer; }
.form-group select option { background: rgba(8,13,24,0.9); color: var(--text-primary); }
.form-group textarea { resize: vertical; min-height: 110px; line-height: 1.65; }
.form-submit { width: 100%; justify-content: center; padding: 15px 28px; font-size: 14.5px; background: linear-gradient(135deg, var(--accent), var(--accent-2)); color: #fff; border: none; border-radius: 12px; font-weight: 650; cursor: pointer; transition: 0.28s var(--spring); display: inline-flex; align-items: center; gap: 8px; font-family: inherit; box-shadow: 0 6px 18px var(--accent-glow); position: relative; overflow: hidden; }
.form-submit > * { position: relative; z-index: 1; }
.form-submit::after { content:''; position:absolute; top:0; left:-130%; width:55%; height:100%; background: linear-gradient(100deg, transparent, rgba(255,255,255,0.4), transparent); transform: skewX(-20deg); transition: left 0.6s ease; z-index:0; }
.form-submit:hover::after { left: 140%; }
.form-submit:hover { transform: translateY(-1px); box-shadow: 0 12px 28px var(--accent-glow); filter: brightness(1.03); }
.form-submit:active { transform: scale(0.97); }
.form-privacy { font-size: 11.5px; color: var(--text-dim); text-align: center; margin-top: 15px; }

/* ==================== MODAL ==================== */
.modal-overlay { position: fixed; inset: 0; background: rgba(4,7,14,0.72); backdrop-filter: blur(8px); -webkit-backdrop-filter: blur(8px); display: flex; align-items: center; justify-content: center; z-index: 10000; opacity: 0; visibility: hidden; transition: 0.3s var(--ease-out); padding: 20px; }
.modal-overlay.active { opacity: 1; visibility: visible; }
.modal-content { background: var(--glass-bg-strong); backdrop-filter: var(--glass-blur); -webkit-backdrop-filter: var(--glass-blur); border-radius: var(--radius-2xl); padding: 42px 38px; max-width: 400px; width: 100%; position: relative; border: 1px solid var(--glass-border); transform: translateY(20px) scale(0.95); transition: 0.35s var(--spring); box-shadow: var(--shadow-xl); }
.modal-overlay.active .modal-content { transform: translateY(0) scale(1); }
.modal-close { position: absolute; top: 14px; right: 14px; width: 34px; height: 34px; border-radius: 50%; border: none; background: rgba(255,255,255,0.08); color: var(--text-secondary); cursor: pointer; display: flex; align-items: center; justify-content: center; font-size: 18px; transition: 0.16s var(--ease-out); }
.modal-close:hover { background: rgba(255,255,255,0.12); color: var(--text-primary); transform: rotate(90deg); }
.modal-body { text-align: center; }
.modal-body h3 { font-size: 18px; font-weight: 650; margin-bottom: 6px; }
.modal-subtitle { font-size: 13.5px; color: var(--text-secondary); margin-bottom: 24px; }
.qr-wrapper { width: 184px; height: 184px; margin: 0 auto 14px; border-radius: var(--radius); overflow: hidden; border: 1px solid var(--border); box-shadow: var(--shadow-sm); }
.qr-wrapper img { width: 100%; height: 100%; object-fit: cover; }
.modal-hint { font-size: 12.5px; color: var(--text-dim); margin-bottom: 20px; }
.modal-email-btn { display: inline-flex; align-items: center; gap: 6px; padding: 10px 19px; border: 1px solid var(--border); border-radius: 20px; font-size: 12.5px; color: var(--text-muted); background: transparent; transition: 0.16s var(--ease-out); font-family: inherit; cursor: pointer; }
.modal-email-btn:hover { border-color: var(--border-hover); color: var(--text-secondary); background: var(--bg-secondary); }

/* ==================== TOAST ==================== */
.toast { position: fixed; bottom: calc(28px + env(safe-area-inset-bottom)); left: 50%; transform: translateX(-50%) translateY(80px); background: var(--bg-dark); color: #fff; padding: 13px 26px; border-radius: 22px; font-size: 13.5px; font-weight: 600; z-index: 10001; opacity: 0; transition: 0.4s var(--spring); pointer-events: none; white-space: nowrap; box-shadow: 0 8px 28px rgba(0,0,0,0.5); }
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }
.toast.success { background: var(--green); color: #fff; }
.toast.error { background: var(--red); color: #fff; }

/* ==================== BACK TO TOP ==================== */
.back-to-top { position: fixed; bottom: calc(28px + env(safe-area-inset-bottom)); right: 28px; width: 44px; height: 44px; border-radius: 50%; background: var(--bg-card); border: 1px solid var(--border); color: var(--text-primary); cursor: pointer; display: flex; align-items: center; justify-content: center; z-index: 999; opacity: 0; visibility: hidden; transition: var(--transition); box-shadow: var(--shadow-md); }
.back-to-top.visible { opacity: 1; visibility: visible; }
.back-to-top:hover { background: linear-gradient(135deg, var(--accent), var(--accent-2)); color: #fff; border-color: transparent; transform: translateY(-3px); box-shadow: var(--shadow-lg); }

/* ==================== FOOTER (LIGHT PREMIUM) ==================== */
.footer { background: var(--grid), linear-gradient(180deg, #0b1120 0%, #070b14 100%); padding: 72px 0 24px; color: var(--text-secondary); border-top: 1px solid var(--border); position: relative; }
.footer::before { content: ''; position: absolute; top: 0; left: 0; right: 0; height: 1px; background: linear-gradient(90deg, transparent, var(--accent-soft) 30%, var(--gold-soft) 50%, var(--accent-soft) 70%, transparent); pointer-events: none; }
.footer-grid { display: grid; grid-template-columns: 2.5fr repeat(3,1fr); gap: 44px; margin-bottom: 44px; }
.footer-brand p { font-size: 12.5px; color: var(--text-muted); line-height: 1.75; max-width: 320px; }
.footer-brand .nav-logo { display: inline-flex; margin-bottom: 14px; }
.footer-contact { margin-top: 16px; display: flex; flex-direction: column; gap: 6px; }
.footer-contact p { font-size: 12.5px; color: var(--text-muted); }
.footer-contact a { color: var(--text-muted); transition: color 0.2s ease; display: inline-block; }
.footer-contact a:hover { color: var(--accent); }
.footer-grid > div > h4 { font-size: 11.5px; font-weight: 700; color: var(--text-primary); margin-bottom: 16px; letter-spacing: 0.04em; }
.footer-grid > div > h4::after { content: ''; display: block; width: 18px; height: 2px; border-radius: 2px; background: linear-gradient(90deg, var(--accent), var(--gold)); margin-top: 8px; }
.footer-grid ul a { display: block; font-size: 12px; color: var(--text-muted); margin-bottom: 8px; transition: color 0.2s ease, transform 0.3s var(--spring); width: fit-content; }
.footer-grid ul a:hover { color: var(--accent); transform: translateX(3px); }
.footer-bottom { padding-top: 18px; border-top: 1px solid var(--border); display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 10px; }
.footer-bottom span { font-size: 11.5px; color: var(--text-dim); }
.footer-bottom a { font-size: 11.5px; color: var(--text-dim); transition: color 0.2s ease; }
.footer-bottom a:hover { color: var(--accent); }
.footer-bottom-links { display: flex; align-items: center; gap: 6px; flex-wrap: wrap; }
.footer-divider { color: var(--border-hover); font-size: 10px; user-select: none; }
.footer-admin-link { display: none; }
.footer-legal { padding: 16px 0; margin-bottom: 14px; border-bottom: 1px solid var(--border); }
.footer-legal p { font-size: 11.5px; color: var(--text-dim); }

/* ==================== SKELETON ==================== */
.skeleton { background: linear-gradient(90deg, #eef0f4 25%, #e0e3e9 37%, #eef0f4 63%); background-size: 400% 100%; animation: skeletonShimmer 1.4s ease infinite; border-radius: var(--radius-sm); }
@keyframes skeletonShimmer { 0%{background-position:100% 50%} 100%{background-position:0 50%} }

/* ==================== HERO PARTICLES ==================== */
.hero-particles { position: absolute; inset: 0; overflow: hidden; pointer-events: none; z-index: 0; }
.hero-particle { position: absolute; bottom: -10px; background: rgba(45,226,230,0.42); border-radius: 50%; animation: floatUp linear infinite; }
@keyframes floatUp { 0% { transform: translateY(0) translateX(0); opacity: var(--particle-opacity, 0.2); } 50% { opacity: 0; } 100% { transform: translateY(-120vh) translateX(40px); opacity: 0; } }
.hero-grain { position: absolute; inset: 0; pointer-events: none; opacity: 0.025; z-index: 1; background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)'/%3E%3C/svg%3E"); background-size: 200px 200px; }
.hero-image-glow { position: absolute; inset: -30%; background: radial-gradient(ellipse at 35% 30%, rgba(45,226,230,0.18) 0%, transparent 60%), radial-gradient(ellipse at 65% 70%, rgba(177,77,255,0.10) 0%, transparent 55%); pointer-events: none; z-index: 0; }

/* ==================== CURSOR GLOW ==================== */
.cursor-glow { position: fixed; left: 0; top: 0; width: 420px; height: 420px; border-radius: 50%; pointer-events: none; z-index: 9999; background: radial-gradient(circle at center, rgba(45,226,230,0.08) 0%, rgba(45,226,230,0.02) 35%, transparent 70%); will-change: transform; }
@media (prefers-reduced-motion: reduce) { .cursor-glow { display: none; } }

/* ==================== STAT SPARKLE ==================== */
@keyframes statSparkle {
    0%   { transform: translate(0, 0) scale(0); opacity: 0.8; }
    100% { transform: translate(var(--sx, 30px), var(--sy, -30px)) scale(1); opacity: 0; }
}

/* ==================== BUTTON RIPPLE ==================== */
@keyframes btnRipple {
    0%   { transform: scale(0); opacity: 0.35; }
    100% { transform: scale(1); opacity: 0; }
}

/* ==================== VIDEO ==================== */
.video-showcase-section { padding: 88px 0; background: var(--grid), var(--bg-primary); }
.video-showcase-grid { display: grid; grid-template-columns: repeat(2,1fr); gap: 34px; }
.video-showcase-card { background: var(--bg-card); border-radius: var(--radius-xl); overflow: hidden; border: 1px solid var(--border); transition: 0.35s var(--spring); box-shadow: var(--shadow-sm); }
.video-showcase-card:hover { box-shadow: var(--shadow-lg); transform: translateY(-3px); }
.video-wrapper { position: relative; width: 100%; background: #0a0a0a; overflow: hidden; aspect-ratio: 16/9; }
@supports not (aspect-ratio:16/9) { .video-wrapper{height:0;padding-bottom:56.25%} .video-wrapper video{position:absolute;inset:0;width:100%;height:100%} }
.video-wrapper video { display: block; width: 100%; height: 100%; object-fit: contain; background: #0a0a0a; outline: none; }

/* Loading overlay */
.video-loading-overlay {
    position: absolute; inset: 0; z-index: 3; display: flex;
    flex-direction: column; align-items: center; justify-content: center; gap: 14px;
    background: rgba(10,10,10,0.82); backdrop-filter: blur(4px);
    transition: opacity 0.3s ease, visibility 0.3s ease; pointer-events: none;
}
.video-loading-overlay.hidden { opacity: 0; visibility: hidden; }
.video-loading-spinner {
    width: 40px; height: 40px; border: 3px solid rgba(255,255,255,0.12);
    border-top-color: #4f46e5; border-radius: 50%;
    animation: videoSpinner 0.75s linear infinite;
}
@keyframes videoSpinner { to { transform: rotate(360deg); } }
.video-loading-text { color: rgba(255,255,255,0.55); font-size: 0.8rem; letter-spacing: 0.04em; }

/* Buffering indicator (3 bouncing dots) */
.video-buffering-indicator {
    position: absolute; bottom: 56px; left: 50%; transform: translateX(-50%);
    z-index: 2; display: flex; gap: 6px; opacity: 0; visibility: hidden;
    transition: opacity 0.2s;
}
.video-buffering-indicator.active { opacity: 1; visibility: visible; }
.video-buffering-indicator > div {
    width: 8px; height: 8px; border-radius: 50%; background: rgba(255,255,255,0.7);
    animation: bufferBounce 1.2s ease-in-out infinite;
}
.video-buffering-indicator > div:nth-child(2) { animation-delay: 0.15s; }
.video-buffering-indicator > div:nth-child(3) { animation-delay: 0.3s; }
@keyframes bufferBounce {
    0%, 80%, 100% { transform: scale(0.4); opacity: 0.4; }
    40% { transform: scale(1); opacity: 1; }
}

/* Error overlay */
.video-error-overlay {
    position: absolute; inset: 0; z-index: 4; display: none;
    flex-direction: column; align-items: center; justify-content: center; gap: 10px;
    background: rgba(10,10,10,0.88); backdrop-filter: blur(6px);
    color: rgba(255,255,255,0.8); text-align: center; padding: 24px;
}
.video-error-overlay.active { display: flex; }
.video-error-overlay svg { opacity: 0.55; }
.video-error-overlay p { font-size: 0.85rem; margin: 0; line-height: 1.5; color: rgba(255,255,255,0.55); }
.video-retry-btn {
    margin-top: 6px; padding: 8px 22px; border: 1px solid rgba(255,255,255,0.25);
    border-radius: 20px; background: rgba(255,255,255,0.08); color: rgba(255,255,255,0.85);
    font-size: 0.8rem; cursor: pointer; transition: all 0.25s; letter-spacing: 0.03em;
}
.video-retry-btn:hover { background: rgba(255,255,255,0.16); border-color: rgba(255,255,255,0.45); }

/* Video ready state — show controls smoothly */
.video-wrapper.ready .video-loading-overlay { opacity: 0; visibility: hidden; }
.video-wrapper video { transition: opacity 0.4s; }
.video-wrapper:not(.ready) video { opacity: 0; }
.video-wrapper.ready video { opacity: 1; }

.video-showcase-info { padding: 26px 30px; }
.video-showcase-info h3 { font-size: 1.15rem; font-weight: 700; margin: 0 0 7px; letter-spacing: -0.01em; }
.video-showcase-info p { font-size: 0.9rem; color: var(--text-secondary); line-height: 1.6; margin: 0; }
@media (max-width:768px) { .video-showcase-grid{grid-template-columns:1fr;gap:22px} .video-showcase-info{padding:18px} }

/* ==================== NEWS ==================== */
.news-section { padding: 112px 0; background: var(--grid), var(--bg-secondary); }
.news-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 18px; }
.news-card { background: var(--bg-card); border-radius: var(--radius-xl); border: 1px solid var(--border); overflow: hidden; transition: all 0.45s var(--spring); opacity: 0; transform: translateY(24px); cursor: pointer; box-shadow: var(--shadow-sm); position: relative; }
.news-card.visible { opacity: 1; transform: translateY(0); }
.news-card:hover { border-color: transparent; transform: translateY(-5px); box-shadow: var(--shadow-lg); }
.news-card::after { content:''; position:absolute; inset:0; border-radius:inherit; padding:1px; background: var(--metal-frame); -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0); -webkit-mask-composite: xor; mask-composite: exclude; opacity:0; transition: opacity 0.4s var(--ease-out); pointer-events:none; z-index:3; }
.news-card:hover::after { opacity: 1; }
.news-card-image { aspect-ratio: 16/9; background: var(--bg-secondary); overflow: hidden; position: relative; }
@supports not (aspect-ratio:16/9){ .news-card-image{height:0;padding-bottom:56.25%;position:relative} .news-card-image img{position:absolute;inset:0;width:100%;height:100%} }
.news-card-image img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.7s var(--ease-out); }
.news-card:hover .news-card-image img { transform: scale(1.05); }
.news-card-image-placeholder { width: 100%; height: 100%; display: flex; align-items: center; justify-content: center; background: linear-gradient(135deg, #0e1626 0%, #10203a 100%); }
.news-card-image-placeholder svg { color: var(--accent); opacity: 0.25; }
.news-card-body { padding: 22px; }
.news-card-date { font-size: 10.5px; color: var(--text-dim); margin-bottom: 9px; font-weight: 600; letter-spacing: 0.02em; transition: color 0.25s ease; }
.news-card:hover .news-card-date { color: var(--accent); }
.news-card h3 { font-size: 15.5px; font-weight: 650; margin-bottom: 7px; line-height: 1.4; display: -webkit-box; -webkit-line-clamp:2; -webkit-box-orient:vertical; overflow: hidden; transition: color 0.25s ease; }
.news-card:hover h3 { color: var(--accent); }
.news-card p { font-size: 12.5px; color: var(--text-muted); line-height: 1.65; display: -webkit-box; -webkit-line-clamp:2; -webkit-box-orient:vertical; overflow: hidden; }
.news-card-footer { display: flex; justify-content: space-between; align-items: center; margin-top: 16px; padding-top: 15px; border-top: 1px solid var(--border); }
.news-card-tag { font-size: 9.5px; font-weight: 700; padding: 3px 9px; border-radius: 10px; background: var(--accent-soft); color: var(--accent); text-transform: uppercase; letter-spacing: 0.03em; }
.news-card-read { font-size: 11.5px; color: var(--text-dim); font-weight: 600; display: flex; align-items: center; gap: 4px; transition: 0.25s ease; }
.news-card:hover .news-card-read { color: var(--accent); gap: 7px; }
.news-card:nth-child(1){transition-delay:0s} .news-card:nth-child(2){transition-delay:.06s} .news-card:nth-child(3){transition-delay:.12s} .news-card:nth-child(4){transition-delay:.06s} .news-card:nth-child(5){transition-delay:.12s} .news-card:nth-child(6){transition-delay:.18s}
.news-loading { grid-column: 1/-1; text-align: center; padding: 48px; color: var(--text-dim); font-size: 13.5px; }

.section-dark { background: var(--bg-secondary); }

/* News Modal */
.news-modal-overlay { position: fixed; inset: 0; background: rgba(4,7,14,0.72); backdrop-filter: blur(8px); -webkit-backdrop-filter: blur(8px); display: flex; align-items: center; justify-content: center; z-index: 10000; opacity: 0; visibility: hidden; transition: 0.3s var(--ease-out); padding: 20px; }
.news-modal-overlay.active { opacity: 1; visibility: visible; }
.news-modal-content { background: var(--glass-bg-strong); backdrop-filter: var(--glass-blur); -webkit-backdrop-filter: var(--glass-blur); border-radius: var(--radius-2xl); padding: 42px 38px; max-width: 600px; width: 100%; position: relative; border: 1px solid var(--glass-border); transform: translateY(20px) scale(0.95); transition: 0.35s var(--spring); max-height: 85vh; overflow-y: auto; box-shadow: var(--shadow-xl); }
.news-modal-overlay.active .news-modal-content { transform: translateY(0) scale(1); }
.news-modal-close { position: absolute; top: 14px; right: 14px; width: 34px; height: 34px; border-radius: 50%; border: none; background: rgba(255,255,255,0.08); color: var(--text-secondary); cursor: pointer; display: flex; align-items: center; justify-content: center; font-size: 18px; transition: 0.16s var(--ease-out); }
.news-modal-close:hover { background: rgba(255,255,255,0.12); color: var(--text-primary); transform: rotate(90deg); }
.news-modal-date { font-size: 11.5px; color: var(--accent); margin-bottom: 7px; font-weight: 600; letter-spacing: 0.02em; }
.news-modal-content h2 { font-size: 23px; font-weight: 750; margin-bottom: 16px; letter-spacing: -0.015em; line-height: 1.3; text-wrap: balance; }
.news-modal-body { font-size: 14.5px; color: var(--text-secondary); line-height: 1.9; white-space: pre-line; }
.news-modal-image { width: 100%; aspect-ratio: 16/9; background-size: cover; background-position: center; border-radius: var(--radius-xl); margin-bottom: 22px; background-color: var(--bg-secondary); box-shadow: var(--shadow-md); }
@supports not (aspect-ratio:16/9){ .news-modal-image{height:0;padding-bottom:56.25%;position:relative} }

/* ==================== AI CRAWLER COMPAT LAYER ==================== */
noscript html,
noscript html.js-loading { opacity: 1 !important; }
noscript .hero-badge,
noscript .hero-desc,
noscript .hero-buttons,
noscript .hero-stats,
noscript .hero-title .word,
noscript .section-header,
noscript .solution-card,
noscript .product-card,
noscript .product-card-model,
noscript .about-image,
noscript .about-content,
noscript .stat-item,
noscript .contact-form,
noscript .contact-info,
noscript .news-card,
noscript .product-gallery-item,
noscript .product-detail-section {
    opacity: 1 !important;
    transform: none !important;
    visibility: visible !important;
    animation: none !important;
    transition: none !important;
}
noscript .nav-dropdown-menu,
noscript .lang-dropdown {
    opacity: 1 !important;
    visibility: visible !important;
    transform: none !important;
}
noscript .video-wrapper:not(.ready) video { opacity: 1 !important; }
noscript .video-loading-overlay { display: none !important; }

/* ==================== RESPONSIVE ==================== */
@media (max-width:1200px) { .products-grid { grid-template-columns: repeat(3,1fr); } }
@media (max-width:1024px) {
    .container, .nav-container { padding: 0 36px; }
    .hero .container { grid-template-columns: 1fr; gap: 44px; text-align: center; }
    .hero-desc { margin-left: auto; margin-right: auto; }
    .hero-buttons { justify-content: center; }
    .hero-stats { justify-content: center; }
    .hero-visual { order: -1; }
    .hero-image-wrapper { max-width: 460px; margin: 0 auto; }
    .about-grid { grid-template-columns: 1fr; gap: 44px; }
    .about-image { max-width: 520px; margin: 0 auto; }
    .contact-grid { grid-template-columns: 1fr; gap: 44px; }
    .footer-grid { grid-template-columns: repeat(2,1fr); }
    .advantages-grid { grid-template-columns: repeat(2,1fr); }
}
@media (max-width:768px) {
    .container, .nav-container { padding: 0 20px; }
    .nav-links { position: fixed; inset: 0; background: rgba(252,252,253,0.98); backdrop-filter: blur(26px); -webkit-backdrop-filter: blur(26px); flex-direction: column; justify-content: flex-start; align-items: center; gap: 6px; opacity: 0; visibility: hidden; transform: scale(0.96); transition: 0.4s var(--spring); z-index: 999; overflow-y: auto; overflow-x: hidden; -webkit-overflow-scrolling: touch; padding-top: calc(var(--nav-height) + 32px); padding-bottom: calc(40px + env(safe-area-inset-bottom)); }
    .nav-links.open { opacity: 1; visibility: visible; transform: scale(1); }
    .nav-link { font-size: 18px; padding: 12px 20px; color: var(--text-secondary); }
    .nav-phone { display: none; }
    .nav-mobile-btn { display: flex; }
    .nav-dropdown { text-align: center; }
    .nav-dropdown-trigger { font-size: 18px; padding: 12px 20px; color: var(--text-secondary); cursor: pointer; }
    .nav-dropdown-trigger svg { width: 16px; height: 16px; }
    .nav-dropdown-trigger.mobile-expanded svg { transform: rotate(180deg); }
    .nav-dropdown-menu { position: static; transform: none; opacity: 1; visibility: visible; background: transparent; border: none; padding: 0; min-width: auto; box-shadow: none; max-height: 0; overflow: hidden; transition: max-height 0.4s var(--spring); }
    .nav-dropdown-menu.mobile-expanded { max-height: 600px; }
    .nav-dropdown-item { padding: 10px 20px; justify-content: center; }
    .nav-dropdown-item-text strong { font-size: 14px; }
    .nav-dropdown-item-text span { font-size: 12px; }
    .hero { padding: 76px 0 56px; min-height: auto; }
    .hero-title { font-size: 34px; }
    .hero-image-wrapper { max-width: 360px; }
    .hero-stats { gap: 30px; }
    .hero-stat-number { font-size: 28px; }
    .products-section, .solutions-section, .about-section, .contact-section, .news-section, .video-showcase-section { padding: 68px 0; }
    .section-header { margin-bottom: 44px; }
    .products-grid { grid-template-columns: repeat(2,1fr); gap: 12px; }
    .solutions-grid { grid-template-columns: 1fr; }
    .news-grid { grid-template-columns: 1fr; }
    .stats-grid { grid-template-columns: repeat(2,1fr); gap: 28px; }
    .stat-number { font-size: 38px; }
    .about-features { grid-template-columns: 1fr; }
    .contact-form { padding: 30px 22px; }
    .footer-grid { grid-template-columns: 1fr; gap: 30px; }
    .footer-bottom { flex-direction: column; text-align: center; }
    .advantages-grid { grid-template-columns: 1fr; }
    .nav-right { gap: 8px; }
    .form-group input, .form-group select, .form-group textarea { font-size: 16px; }
}
@media (max-width:480px) {
    .products-grid { grid-template-columns: 1fr; }
    .hero-buttons { flex-direction: column; width: 100%; }
    .hero-buttons .btn { width: 100%; justify-content: center; }
    .stats-grid { grid-template-columns: 1fr; gap: 20px; }
    .modal-content { padding: 30px 22px; }
    .back-to-top { bottom: calc(18px + env(safe-area-inset-bottom)); right: 18px; width: 40px; height: 40px; }
}
/* 375px 断点：汉堡菜单微调 */
@media (max-width:375px) {
    .nav-links { justify-content: flex-start; padding-top: calc(var(--nav-height) + 20px); gap: 0; }
    .nav-link { font-size: 17px; padding: 13px 20px; width: 100%; text-align: center; min-height: 48px; display: flex; align-items: center; justify-content: center; }
    .nav-dropdown-trigger { font-size: 17px; padding: 13px 20px; width: 100%; min-height: 48px; display: flex; align-items: center; justify-content: center; gap: 6px; }
    .nav-dropdown-item { padding: 12px 20px; min-height: 44px; }
    .nav-dropdown-item-text strong { font-size: 13px; }
    .nav-dropdown-item-text span { font-size: 11px; }
    .nav-mobile-btn { padding: 10px; min-width: 44px; min-height: 44px; }
    .nav-container { padding: 0 14px; }
    .hero { padding: 64px 0 44px; }
    .hero-title { font-size: 28px; }
    .hero-image-wrapper { max-width: 300px; }
    .section-title { font-size: 26px; }
    .container { padding: 0 16px; }
}

/* ==================== REDUCED MOTION ==================== */
@media (prefers-reduced-motion: reduce) {
    *,*::before,*::after { animation-duration:0.01ms!important; animation-iteration-count:1!important; transition-duration:0.01ms!important; scroll-behavior:auto!important; }
    .product-card,.news-card,.solution-card { opacity: 1; transform: none; }
    .hero-title .word { opacity: 1; transform: none; animation: none; }
    :root { --scroll: 0 !important; --mx: 0 !important; --my: 0 !important; }
    .cursor-glow { display: none !important; }
}

/* ==================== FOCUS ==================== */
a:focus-visible,button:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible,[tabindex]:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; border-radius: 4px; }
.btn:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
a:focus:not(:focus-visible),button:focus:not(:focus-visible),input:focus:not(:focus-visible),select:focus:not(:focus-visible),textarea:focus:not(:focus-visible) { outline: none; }