/* ============================================
   DOZZON · 道中创新 — Neo-Tech Design v8
   Clean Bright · Refined Spacing · Fluid Motion
   ============================================ */
:root {
    --bg-primary: #fafbfd;
    --bg-secondary: #f0f3f8;
    --bg-card: #ffffff;
    --bg-card-hover: #f8f9fc;
    --bg-input: #eff1f6;
    --bg-overlay: rgba(15,20,35,0.45);
    --bg-dark: #111827;
    --bg-dark-text: rgba(255,255,255,0.93);
    --bg-dark-secondary: rgba(255,255,255,0.54);
    --bg-dark-muted: rgba(255,255,255,0.36);
    --bg-dark-dim: rgba(255,255,255,0.18);

    --text-primary: #111827;
    --text-secondary: rgba(17,24,39,0.66);
    --text-muted: rgba(17,24,39,0.48);
    --text-dim: rgba(17,24,39,0.30);

    --border: rgba(17,24,39,0.08);
    --border-hover: rgba(17,24,39,0.16);
    --border-active: rgba(37,99,235,0.35);

    --accent: #2563eb;
    --accent-soft: rgba(37,99,235,0.08);
    --accent-glow: rgba(37,99,235,0.18);
    --accent-teal: #0891b2;
    --accent-teal-soft: rgba(8,145,178,0.08);
    --purple: #a855f7;
    --purple-glow: rgba(168,85,247,0.18);
    --green: #059669;
    --green-soft: rgba(5,150,105,0.08);
    --amber: #d97706;
    --amber-soft: rgba(217,119,6,0.08);
    --red: #dc2626;
    --red-soft: rgba(220,38,38,0.08);

    --radius-sm: 6px; --radius: 10px; --radius-lg: 14px; --radius-xl: 20px; --radius-2xl: 28px;
    --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: 0.3s var(--ease-out);
    --transition-fast: 0.16s var(--ease-out);
    --max-width: 1400px;
    --nav-height: 52px;
}

*, *::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 0.4s ease; }

body {
    font-family: -apple-system, BlinkMacSystemFont, 'SF Pro Display', 'Segoe UI', 'PingFang SC', 'HarmonyOS Sans', 'Microsoft YaHei', sans-serif;
    color: var(--text-primary);
    background: var(--bg-primary);
    line-height: 1.5; letter-spacing: -0.02em;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    -webkit-tap-highlight-color: transparent;
    touch-action: manipulation;
    scrollbar-width: thin;
    scrollbar-color: rgba(17,24,39,0.12) transparent;
}

::selection { background: rgba(37,99,235,0.15); color: var(--text-primary); }
::-moz-selection { background: rgba(37,99,235,0.15); color: var(--text-primary); }
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: rgba(17,24,39,0.12); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: rgba(17,24,39,0.22); }

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 8px 8px; 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 60px; }

/* ==================== 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(250,251,253,0.78);
    backdrop-filter: saturate(180%) blur(24px);
    -webkit-backdrop-filter: saturate(180%) blur(24px);
    z-index: 1000;
    border-bottom: 1px solid var(--border);
    transition: 0.35s var(--ease-out);
}
.navbar.scrolled {
    background: rgba(250,251,253,0.94);
    box-shadow: 0 1px 12px rgba(0,0,0,0.06);
}

.scroll-progress {
    position: fixed; top: 0; left: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--accent), var(--accent-teal));
    z-index: 1001; width: 0%;
    pointer-events: none; border-radius: 0 1px 1px 0;
}

.nav-container { max-width: var(--max-width); margin: 0 auto; padding: 0 60px; height: 100%; display: flex; align-items: center; justify-content: space-between; }
.nav-logo { display: flex; align-items: center; gap: 10px; font-weight: 600; font-size: 17px; color: var(--text-primary); letter-spacing: -0.3px; }
.nav-logo-img { height: 30px; width: auto; display: block; }
.footer-logo-img { height: 34px; opacity: 0.92; }
.nav-links { display: flex; gap: 2px; align-items: center; }
.nav-link { padding: 6px 12px; font-size: 12px; font-weight: 400; color: var(--text-muted); border-radius: 6px; 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: 16px; height: 1.5px; background: var(--accent); 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: 500; }
.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); }
.nav-dropdown-menu {
    position: absolute; top: calc(100% + 8px); left: 50%;
    transform: translateX(-50%) translateY(-8px) scale(0.96);
    background: rgba(255,255,255,0.96);
    backdrop-filter: blur(40px); -webkit-backdrop-filter: blur(40px);
    border-radius: var(--radius-lg); border: 1px solid var(--border);
    padding: 8px; min-width: 280px;
    opacity: 0; visibility: hidden;
    transition: 0.25s ease, transform 0.4s var(--spring);
    z-index: 100; transform-origin: top center;
    box-shadow: 0 24px 64px rgba(0,0,0,0.08);
    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: 10px 12px; border-radius: 8px;
    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: 20px; height: 20px; 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: 500; }
.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: 12px; font-weight: 600; color: var(--text-secondary); cursor: pointer; padding: 6px 8px; border-radius: 6px; 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(17,24,39,0.04); color: var(--text-primary); }
.lang-dropdown { position: absolute; top: calc(100% + 8px); right: 0; background: #fff; backdrop-filter: blur(24px); -webkit-backdrop-filter: blur(24px); border-radius: var(--radius); border: 1px solid var(--border); padding: 4px; min-width: 120px; opacity: 0; visibility: hidden; transform: translateY(-8px) scale(0.96); transition: 0.25s ease, transform 0.4s var(--spring); z-index: 100; box-shadow: 0 16px 40px rgba(0,0,0,0.08); }
.lang-switcher:hover .lang-dropdown { opacity: 1; visibility: visible; transform: translateY(0) scale(1); }
.lang-item { display: block; width: 100%; padding: 8px 14px; font-size: 12px; border-radius: 6px; 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(17,24,39,0.05); color: var(--text-primary); }

.nav-phone { display: flex; align-items: center; gap: 6px; font-size: 12px; font-weight: 500; color: var(--text-secondary); padding: 7px 14px; border-radius: 18px; border: 1px solid var(--border); transition: 0.16s var(--ease-out); }
.nav-phone:hover { background: var(--accent); color: #fff; border-color: var(--accent); transform: translateY(-1px); box-shadow: 0 2px 12px var(--accent-glow); }

/* ==================== HERO ==================== */
.hero {
    min-height: 95vh; display: flex; align-items: center;
    padding: 100px 0 80px;
    background: linear-gradient(175deg, #f8fafe 0%, #fafbfd 40%, #f3f5fa 100%);
    position: relative; overflow: hidden;
}
.hero::before {
    content: ''; position: absolute; top: -40%; right: -25%;
    width: 70%; height: 180%;
    background: radial-gradient(ellipse at 55% 38%, rgba(37,99,235,0.05) 0%, rgba(8,145,178,0.03) 35%, transparent 68%);
    pointer-events: none;
}
.hero-fade-bar {
    position: absolute; bottom: 0; left: 0; right: 0; height: 100px;
    background: linear-gradient(180deg, transparent 0%, var(--bg-primary) 100%);
    pointer-events: none; z-index: 2;
}
.hero .container { display: grid; grid-template-columns: 1fr 1fr; gap: 64px; align-items: center; position: relative; z-index: 1; }

.hero-badge {
    display: inline-flex; align-items: center; gap: 8px;
    font-size: 12px; font-weight: 600; color: var(--accent);
    text-transform: uppercase; letter-spacing: 0.06em;
    margin-bottom: 20px;
    opacity: 0; transform: translateY(16px);
    animation: heroFadeUp 0.6s var(--ease-out) 0.12s forwards;
}
.hero-badge::before { content: ''; width: 20px; height: 1.5px; background: var(--accent); transition: width 0.4s var(--spring); }
.hero-badge:hover::before { width: 36px; }

.hero-title {
    font-size: clamp(40px,5vw,60px); font-weight: 700; line-height: 1.08;
    letter-spacing: -0.025em; color: var(--text-primary); margin-bottom: 16px;
    opacity: 0; transform: translateY(20px);
    animation: heroFadeUp 0.7s var(--ease-out) 0.2s forwards;
}
.hero-title em { font-style: normal; background: linear-gradient(135deg, var(--accent) 0%, var(--accent-teal) 100%); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.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: 16px; color: var(--text-secondary); line-height: 1.7; margin-bottom: 36px; max-width: 460px; opacity: 0; transform: translateY(16px); animation: heroFadeUp 0.6s var(--ease-out) 0.35s forwards; }
.hero-buttons { display: flex; gap: 10px; 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: 7px;
    font-size: 13px; font-weight: 500; padding: 11px 24px; border-radius: 20px;
    border: none; cursor: pointer; transition: all 0.28s var(--spring); letter-spacing: -0.01em;
    font-family: inherit; white-space: nowrap; position: relative; overflow: hidden; min-height: 42px;
}
.btn:active { transform: scale(0.96); }
.btn-primary { background: var(--accent); color: #fff; font-weight: 600; }
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 6px 24px var(--accent-glow); background: #1d4ed8; }
.btn-outline { background: transparent; color: var(--text-primary); border: 1px solid rgba(17,24,39,0.15); }
.btn-outline:hover { border-color: var(--accent); background: var(--accent-soft); box-shadow: 0 2px 12px rgba(37,99,235,0.06); transform: translateY(-1px); }
.btn-wechat { background: transparent; color: #059669; border: 1px solid rgba(5,150,105,0.22); }
.btn-wechat:hover { background: var(--green-soft); border-color: #059669; transform: translateY(-1px); box-shadow: 0 2px 12px rgba(5,150,105,0.08); }
.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; }
.hero-image-wrapper {
    position: relative; width: 100%; max-width: 500px; aspect-ratio: 4/5;
    background: var(--bg-card); border-radius: var(--radius-2xl); overflow: hidden;
    border: 1px solid var(--border);
    box-shadow: 0 16px 48px rgba(0,0,0,0.05);
    animation: heroFloat 5s 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 0.6s var(--ease-out); }
.hero-image-wrapper:hover img { transform: scale(1.03); }
@keyframes heroFloat { 0%,100%{transform:translateY(0)} 50%{transform:translateY(-10px)} }

.hero-stats { display: flex; gap: 48px; margin-top: 48px; padding-top: 28px; 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: 36px; font-weight: 700; color: var(--text-primary); letter-spacing: -1px; line-height: 1; }
.hero-stat-label { font-size: 11px; color: var(--text-muted); margin-top: 6px; font-weight: 500; }

/* ==================== SECTIONS ==================== */
.products-section, .solutions-section, .about-section, .contact-section { padding: 100px 0; position: relative; z-index: 1; }
.products-section { background: var(--bg-primary); }
.solutions-section { background: var(--bg-secondary); }
.about-section { background: var(--bg-primary); }
.contact-section { background: var(--bg-secondary); }

.section-header { text-align: center; margin-bottom: 56px; opacity: 0; transform: translateY(16px); transition: all 0.5s var(--ease-out); }
.section-header.visible { opacity: 1; transform: translateY(0); }
.section-tag { font-size: 10px; font-weight: 600; letter-spacing: 0.18em; text-transform: uppercase; color: var(--accent); margin-bottom: 16px; display: inline-block; }
.section-tag::after { content: ''; display: block; width: 24px; height: 2px; border-radius: 1px; background: var(--accent); margin: 12px auto 0; transition: width 0.4s var(--spring); }
.section-header:hover .section-tag::after { width: 36px; }
.section-title { font-size: clamp(28px,3.5vw,42px); font-weight: 700; letter-spacing: -0.02em; line-height: 1.15; color: var(--text-primary); margin-bottom: 12px; }
.section-subtitle { font-size: 15px; color: var(--text-secondary); max-width: 520px; margin: 0 auto; line-height: 1.65; }

/* ==================== PRODUCTS GRID ==================== */
.products-grid { display: grid; grid-template-columns: repeat(4,1fr); gap: 14px; }
.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);
}
.product-card.visible { opacity: 1; transform: translateY(0); }
.product-card:hover { border-color: var(--accent-soft); transform: translateY(-5px); box-shadow: 0 20px 60px rgba(0,0,0,0.06); z-index: 2; }
.product-card::before {
    content: ''; position: absolute; inset: 0; border-radius: inherit;
    background: linear-gradient(105deg, transparent 33%, rgba(37,99,235,0.03) 40%, rgba(37,99,235,0.03) 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-link { display: flex; flex-direction: column; color: inherit; height: 100%; outline: none; }
.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(1.04); }
.product-card-tag { position: absolute; top: 12px; left: 12px; padding: 3px 10px; background: rgba(255,255,255,0.88); backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px); border-radius: 12px; font-size: 10px; font-weight: 600; color: var(--text-secondary); z-index: 3; letter-spacing: 0.3px; }
.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: 14px; font-weight: 600; 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); }
.product-card-desc { font-size: 11px; color: var(--text-dim); line-height: 1.5; margin-bottom: 10px; }
.product-card-footer { display: flex; justify-content: space-between; align-items: center; margin-top: auto; }
.product-card-model { font-size: 9px; 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); }
.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: 16px; }
.solution-card {
    background: var(--bg-card); border-radius: var(--radius-xl); padding: 36px 28px;
    border: 1px solid var(--border); transition: all 0.45s var(--spring);
    opacity: 0; transform: translateY(24px); position: relative; overflow: hidden;
}
.solution-card.visible { opacity: 1; transform: translateY(0); }
.solution-card:hover { border-color: var(--accent-soft); transform: translateY(-4px); box-shadow: 0 24px 64px rgba(0,0,0,0.05); }
.solution-icon { width: 48px; height: 48px; background: var(--accent-soft); border-radius: var(--radius); display: flex; align-items: center; justify-content: center; color: var(--accent); margin-bottom: 20px; transition: 0.45s var(--spring); position: relative; z-index: 1; }
.solution-card:hover .solution-icon { background: var(--accent); color: #fff; transform: scale(1.05); box-shadow: 0 6px 20px var(--accent-glow); }
.solution-card h3 { font-size: 17px; font-weight: 600; margin-bottom: 8px; 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: 13px; color: var(--text-muted); line-height: 1.7; 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: 64px; 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); }
.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 0.6s var(--ease-out); }
.about-image:hover img { transform: scale(1.04); }
.about-image-badge { position: absolute; bottom: 20px; right: 20px; background: rgba(255,255,255,0.9); backdrop-filter: blur(8px); -webkit-backdrop-filter: blur(8px); border: 1px solid var(--border); border-radius: var(--radius-lg); padding: 14px 18px; display: flex; flex-direction: column; align-items: center; gap: 3px; transition: transform 0.35s var(--spring); z-index: 2; box-shadow: 0 6px 24px rgba(0,0,0,0.04); }
.about-image:hover .about-image-badge { transform: translateY(-4px); }
.about-image-badge-number { font-size: 28px; font-weight: 700; color: var(--accent); line-height: 1; }
.about-image-badge-text { font-size: 10px; color: var(--text-muted); text-align: center; line-height: 1.4; }
.about-content h2 { font-size: 34px; font-weight: 700; margin-bottom: 16px; letter-spacing: -0.6px; }
.about-content > p { font-size: 15px; color: var(--text-secondary); line-height: 1.75; margin-bottom: 28px; }
.about-features { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.about-feature { display: flex; align-items: flex-start; gap: 12px; padding: 16px; border-radius: var(--radius); background: var(--bg-card); border: 1px solid var(--border); transition: 0.35s var(--spring); }
.about-feature:hover { border-color: var(--accent-soft); transform: translateX(3px); }
.about-feature svg { width: 18px; height: 18px; color: var(--accent); flex-shrink: 0; margin-top: 1px; }
.about-feature strong { font-size: 13px; font-weight: 600; margin-bottom: 3px; display: block; }
.about-feature-text span { font-size: 11px; color: var(--text-muted); }

/* ==================== STATS ==================== */
.stats-section { padding: 90px 0; background: linear-gradient(135deg, #f8fafe 0%, #f3f5fa 100%); position: relative; overflow: hidden; }
.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: 16px 12px; margin: -16px -12px; 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: 48px; font-weight: 700; background: linear-gradient(180deg, var(--accent) 0%, var(--accent-teal) 100%); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; letter-spacing: -0.03em; line-height: 1; margin-bottom: 8px; font-variant-numeric: tabular-nums; transition: transform 0.4s var(--spring); }
.stat-item:hover .stat-number { transform: scale(1.04) translateY(-2px); }
.stat-label { font-size: 13px; 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(17,24,39,0.18); }

/* ==================== ADVANTAGES ==================== */
.advantages-section { padding: 80px 0; border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); background: 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; }
.advantage-card { padding: 36px 26px; background: var(--bg-card); transition: 0.35s var(--spring); position: relative; overflow: hidden; }
.advantage-card:hover { background: var(--bg-card-hover); transform: translateY(-2px); box-shadow: 0 6px 20px rgba(0,0,0,0.04); z-index: 2; }
.advantage-number { font-size: 10px; font-weight: 600; letter-spacing: 0.1em; color: var(--text-dim); margin-bottom: 10px; font-variant-numeric: tabular-nums; font-family: 'SF Mono','Consolas',monospace; }
.advantage-card:hover .advantage-number { color: var(--accent); }
.advantage-card h3 { font-size: 16px; font-weight: 600; margin-bottom: 6px; letter-spacing: -0.2px; }
.advantage-card p { font-size: 12px; color: var(--text-muted); line-height: 1.65; }
.advantage-icon { display: inline-flex; align-items: center; justify-content: center; width: 36px; height: 36px; background: var(--accent-soft); border-radius: 8px; color: var(--accent); margin-bottom: 12px; transition: 0.35s var(--spring); }
.advantage-card:hover .advantage-icon { background: var(--accent); color: #fff; transform: scale(1.05); }

/* ==================== CONTACT ==================== */
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 56px; 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: 34px; font-weight: 700; margin-bottom: 12px; letter-spacing: -0.6px; }
.contact-info > p { font-size: 15px; color: var(--text-secondary); line-height: 1.65; margin-bottom: 32px; }
.contact-item { display: flex; align-items: flex-start; gap: 14px; margin-bottom: 20px; }
.contact-item-icon { width: 42px; height: 42px; background: var(--accent-soft); border-radius: var(--radius); display: flex; align-items: center; justify-content: center; color: var(--accent); border: 1px solid rgba(37,99,235,0.1); flex-shrink: 0; transition: 0.25s var(--spring); }
.contact-item:hover .contact-item-icon { background: var(--accent); color: #fff; transform: scale(1.04); }
.contact-item h3 { font-size: 13px; font-weight: 600; margin-bottom: 3px; }
.contact-item p { font-size: 13px; color: var(--text-secondary); }
.contact-wechat { display: flex; align-items: center; gap: 14px; padding: 18px; background: var(--bg-card); border-radius: var(--radius-lg); border: 1px solid var(--border); cursor: pointer; transition: var(--transition); margin-top: 24px; }
.contact-wechat:hover { border-color: rgba(5,150,105,0.3); transform: translateY(-2px); box-shadow: 0 8px 24px rgba(0,0,0,0.04); }

.contact-form { background: var(--bg-card); border-radius: var(--radius-2xl); padding: 40px; border: 1px solid var(--border); box-shadow: 0 2px 16px rgba(0,0,0,0.03); }
.contact-form h3 { font-size: 20px; font-weight: 600; margin-bottom: 24px; }
.form-group { margin-bottom: 16px; }
.form-group label { display: block; font-size: 11px; font-weight: 500; color: var(--text-muted); margin-bottom: 6px; }
.form-group:focus-within label { color: var(--accent); }
.form-group input, .form-group select, .form-group textarea { width: 100%; padding: 12px 14px; border: 1px solid var(--border); border-radius: 8px; font-size: 13px; 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: #fff; }
.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(0,0,0,0.35)' 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: #fff; color: var(--text-primary); }
.form-group textarea { resize: vertical; min-height: 100px; line-height: 1.6; }
.form-submit { width: 100%; justify-content: center; padding: 14px 28px; font-size: 14px; background: var(--accent); color: #fff; border: none; border-radius: 10px; font-weight: 600; cursor: pointer; transition: 0.28s var(--spring); display: inline-flex; align-items: center; gap: 8px; font-family: inherit; }
.form-submit:hover { transform: translateY(-1px); box-shadow: 0 4px 20px var(--accent-glow); background: #1d4ed8; }
.form-submit:active { transform: scale(0.97); }
.form-privacy { font-size: 11px; color: var(--text-dim); text-align: center; margin-top: 14px; }

/* ==================== MODAL ==================== */
.modal-overlay { position: fixed; inset: 0; background: rgba(0,0,0,0.4); 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: #fff; border-radius: var(--radius-2xl); padding: 40px 36px; max-width: 400px; width: 100%; position: relative; border: 1px solid var(--border); transform: translateY(20px) scale(0.95); transition: 0.35s var(--spring); }
.modal-overlay.active .modal-content { transform: translateY(0) scale(1); }
.modal-close { position: absolute; top: 14px; right: 14px; width: 32px; height: 32px; border-radius: 50%; border: none; background: rgba(0,0,0,0.04); 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(0,0,0,0.08); color: var(--text-primary); }
.modal-body { text-align: center; }
.modal-body h3 { font-size: 18px; font-weight: 600; margin-bottom: 6px; }
.modal-subtitle { font-size: 13px; color: var(--text-secondary); margin-bottom: 24px; }
.qr-wrapper { width: 180px; height: 180px; margin: 0 auto 14px; border-radius: var(--radius); overflow: hidden; border: 1px solid var(--border); }
.qr-wrapper img { width: 100%; height: 100%; object-fit: cover; }
.modal-hint { font-size: 12px; color: var(--text-dim); margin-bottom: 20px; }
.modal-email-btn { display: inline-flex; align-items: center; gap: 6px; padding: 9px 18px; border: 1px solid var(--border); border-radius: 18px; font-size: 12px; 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); }

/* ==================== 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: 12px 24px; border-radius: 20px; font-size: 13px; font-weight: 600; z-index: 10001; opacity: 0; transition: 0.4s var(--spring); pointer-events: none; white-space: nowrap; box-shadow: 0 6px 24px rgba(0,0,0,0.12); }
.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: 40px; height: 40px; 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: 0 2px 12px rgba(0,0,0,0.04); }
.back-to-top.visible { opacity: 1; visibility: visible; }
.back-to-top:hover { background: var(--accent); color: #fff; border-color: var(--accent); transform: translateY(-2px); box-shadow: 0 4px 16px var(--accent-glow); }

/* ==================== FOOTER ==================== */
.footer { background: var(--bg-dark); padding: 64px 0 20px; color: var(--bg-dark-text); }
.footer::before { content: ''; position: absolute; top: 0; left: 0; right: 0; height: 1px; background: linear-gradient(90deg, transparent, rgba(255,255,255,0.08) 30%, rgba(255,255,255,0.08) 70%, transparent); pointer-events: none; }
.footer-grid { display: grid; grid-template-columns: 2.5fr repeat(3,1fr); gap: 40px; margin-bottom: 40px; }
.footer-brand p { font-size: 12px; color: var(--bg-dark-secondary); line-height: 1.7; max-width: 320px; }
.footer-brand .nav-logo { display: inline-flex; margin-bottom: 12px; color: var(--bg-dark-text); }
.footer-contact { margin-top: 14px; display: flex; flex-direction: column; gap: 5px; }
.footer-contact p { font-size: 12px; color: var(--bg-dark-secondary); }
.footer-contact a { color: var(--bg-dark-secondary); transition: color 0.2s ease; display: inline-block; }
.footer-contact a:hover { color: var(--accent); }
.footer-grid > div > h4 { font-size: 11px; font-weight: 600; color: var(--bg-dark-muted); margin-bottom: 14px; letter-spacing: 0.2px; }
.footer-grid > div > h4::after { content: ''; display: block; width: 16px; height: 1px; background: var(--accent); margin-top: 7px; }
.footer-grid ul a { display: block; font-size: 11px; color: var(--bg-dark-dim); margin-bottom: 7px; transition: color 0.2s ease, transform 0.3s var(--spring); width: fit-content; }
.footer-grid ul a:hover { color: var(--bg-dark-secondary); transform: translateX(2px); }
.footer-bottom { padding-top: 16px; border-top: 1px solid rgba(255,255,255,0.06); display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 10px; }
.footer-bottom span { font-size: 11px; color: var(--bg-dark-dim); }
.footer-bottom a { font-size: 11px; color: var(--bg-dark-dim); transition: color 0.2s ease; }
.footer-bottom a:hover { color: var(--bg-dark-muted); }
.footer-bottom-links { display: flex; align-items: center; gap: 5px; flex-wrap: wrap; }
.footer-divider { color: rgba(255,255,255,0.1); font-size: 10px; user-select: none; }
.footer-admin-link { display: none; }
.footer-legal { padding: 16px 0; margin-bottom: 14px; border-bottom: 1px solid rgba(255,255,255,0.04); }
.footer-legal p { font-size: 11px; color: var(--bg-dark-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(37,99,235,0.35); 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: 0.03; 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(37,99,235,0.12) 0%, transparent 60%), radial-gradient(ellipse at 65% 70%, rgba(8,145,178,0.08) 0%, transparent 55%); pointer-events: none; z-index: 0; }

/* ==================== CURSOR GLOW ==================== */
.cursor-glow { position: fixed; left: 0; top: 0; width: 400px; height: 400px; border-radius: 50%; pointer-events: none; z-index: 9999; background: radial-gradient(circle at center, rgba(37,99,235,0.04) 0%, rgba(37,99,235,0.01) 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: 80px 0; background: var(--bg-primary); }
.video-showcase-grid { display: grid; grid-template-columns: repeat(2,1fr); gap: 32px; }
.video-showcase-card { background: var(--bg-card); border-radius: var(--radius-xl); overflow: hidden; border: 1px solid var(--border); transition: 0.35s var(--spring); }
.video-showcase-card:hover { box-shadow: 0 8px 32px rgba(0,0,0,0.05); 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: #2563eb; 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: 24px 28px; }
.video-showcase-info h3 { font-size: 1.1rem; font-weight: 700; margin: 0 0 6px; }
.video-showcase-info p { font-size: 0.9rem; color: var(--text-secondary); line-height: 1.55; margin: 0; }
@media (max-width:768px) { .video-showcase-grid{grid-template-columns:1fr;gap:20px} .video-showcase-info{padding:18px 18px} }

/* ==================== NEWS ==================== */
.news-section { padding: 100px 0; background: var(--bg-secondary); }
.news-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 16px; }
.news-card { background: var(--bg-card); border-radius: var(--radius-xl); border: 1px solid var(--border); overflow: hidden; transition: 0.45s var(--spring); opacity: 0; transform: translateY(24px); cursor: pointer; }
.news-card.visible { opacity: 1; transform: translateY(0); }
.news-card:hover { border-color: var(--accent-soft); transform: translateY(-4px); box-shadow: 0 20px 56px rgba(0,0,0,0.06); }
.news-card-image { aspect-ratio: 16/9; background: var(--bg-secondary); overflow: hidden; }
.news-card-image img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.6s var(--ease-out); }
.news-card:hover .news-card-image img { transform: scale(1.04); }
.news-card-image-placeholder { width: 100%; height: 100%; display: flex; align-items: center; justify-content: center; background: linear-gradient(135deg, #eef2ff 0%, #ecfeff 100%); }
.news-card-image-placeholder svg { color: var(--accent); opacity: 0.25; }
.news-card-body { padding: 20px; }
.news-card-date { font-size: 10px; color: var(--text-dim); margin-bottom: 8px; font-weight: 500; transition: color 0.25s ease; }
.news-card:hover .news-card-date { color: var(--accent); }
.news-card h3 { font-size: 15px; font-weight: 600; margin-bottom: 6px; line-height: 1.4; display: -webkit-box; -webkit-line-clamp:2; -webkit-box-orient:vertical; overflow: hidden; }
.news-card p { font-size: 12px; color: var(--text-muted); line-height: 1.6; 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: 14px; padding-top: 14px; border-top: 1px solid var(--border); }
.news-card-tag { font-size: 9px; font-weight: 600; padding: 2px 8px; border-radius: 10px; background: var(--accent-soft); color: var(--accent); text-transform: uppercase; }
.news-card-read { font-size: 11px; color: var(--text-dim); font-weight: 500; display: flex; align-items: center; gap: 3px; transition: 0.25s ease; }
.news-card:hover .news-card-read { color: var(--accent); }
.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: 13px; }

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

/* News Modal */
.news-modal-overlay { position: fixed; inset: 0; background: rgba(0,0,0,0.4); 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: #fff; border-radius: var(--radius-2xl); padding: 40px 36px; max-width: 600px; width: 100%; position: relative; border: 1px solid var(--border); transform: translateY(20px) scale(0.95); transition: 0.35s var(--spring); max-height: 85vh; overflow-y: auto; }
.news-modal-overlay.active .news-modal-content { transform: translateY(0) scale(1); }
.news-modal-close { position: absolute; top: 14px; right: 14px; width: 32px; height: 32px; border-radius: 50%; border: none; background: rgba(0,0,0,0.04); 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(0,0,0,0.08); color: var(--text-primary); }
.news-modal-date { font-size: 11px; color: var(--accent); margin-bottom: 6px; font-weight: 600; }
.news-modal-content h2 { font-size: 22px; font-weight: 700; margin-bottom: 14px; letter-spacing: -0.015em; line-height: 1.3; }
.news-modal-body { font-size: 14px; color: var(--text-secondary); line-height: 1.85; }

/* ==================== 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: 40px; 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: 340px; margin: 0 auto; }
    .about-grid { grid-template-columns: 1fr; gap: 40px; }
    .about-image { max-width: 520px; margin: 0 auto; }
    .contact-grid { grid-template-columns: 1fr; gap: 40px; }
    .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(250,251,253,0.98); backdrop-filter: blur(24px); -webkit-backdrop-filter: blur(24px); 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: 72px 0 56px; min-height: auto; }
    .hero-title { font-size: 34px; }
    .hero-image-wrapper { max-width: 260px; }
    .hero-stats { gap: 28px; }
    .hero-stat-number { font-size: 28px; }
    .products-section, .solutions-section, .about-section, .contact-section, .news-section, .video-showcase-section { padding: 64px 0; }
    .section-header { margin-bottom: 40px; }
    .products-grid { grid-template-columns: repeat(2,1fr); gap: 10px; }
    .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: 36px; }
    .about-features { grid-template-columns: 1fr; }
    .contact-form { padding: 28px 20px; }
    .footer-grid { grid-template-columns: 1fr; gap: 28px; }
    .footer-bottom { flex-direction: column; text-align: center; }
    .advantages-grid { grid-template-columns: 1fr; }
    .nav-right { gap: 8px; }
}
@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: 28px 20px; }
    .back-to-top { bottom: calc(18px + env(safe-area-inset-bottom)); right: 18px; width: 36px; height: 36px; }
}
/* 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: 60px 0 40px; }
    .hero-title { font-size: 28px; }
    .hero-image-wrapper { max-width: 220px; }
    .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; }
}

/* ==================== 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; }