/* ==========================================================================
   天之麟智能科技 · 企业官网设计系统
   风格：简约大气 · 工业金属质感 · 深蓝科技风
   ========================================================================== */

/* ---- 设计令牌 ---- */
:root {
    /* 中性色 — 统一暗色主题 */
    --c-primary:        #0ea5e9;
    --c-primary-dark:   #0284c7;
    --c-primary-light:  #38bdf8;
    --c-accent:         #22d3ee;          /* 青色点缀，科技感 */

    /* 统一暗色背景体系 */
    --c-dark:           #0a1628;          /* 最深背景 */
    --c-dark-2:         #0f172a;          /* 主背景 */
    --c-dark-3:         #1e293b;          /* 卡片/区块背景 */
    --c-dark-4:         #334155;          /* 边框/分割线 */
    --c-text:           #e2e8f0;          /* 主文字（亮色） */
    --c-text-light:     #94a3b8;          /* 次要文字 */
    --c-text-lighter:   #64748b;          /* 占位文字 */
    --c-bg:             #0f172a;          /* body背景 = 主背景 */
    --c-bg-alt:         #1e293b;          /* 交替区块背景（深蓝灰） */
    --c-border:         rgba(148,163,184,.15);  /* 暗色边框 */
    --c-border-dark:    rgba(148,163,184,.1);

    /* 字体 */
    --font-sans: 'PingFang SC', 'Microsoft YaHei', 'Hiragino Sans GB', system-ui, -apple-system, sans-serif;
    --font-mono: 'SF Mono', 'Fira Code', 'Consolas', monospace;

    /* 间距 —— 8px 基准网格 */
    --sp-1: 0.25rem;  --sp-2: 0.5rem;   --sp-3: 0.75rem;
    --sp-4: 1rem;     --sp-5: 1.5rem;   --sp-6: 2rem;
    --sp-8: 3rem;     --sp-10: 4rem;    --sp-12: 6rem;
    --sp-16: 8rem;

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

    /* 阴影 */
    --shadow-sm: 0 1px 2px rgba(15,23,42,.05);
    --shadow-md: 0 4px 12px rgba(15,23,42,.08);
    --shadow-lg: 0 12px 32px rgba(15,23,42,.12);
    --shadow-xl: 0 24px 64px rgba(15,23,42,.16);
    --shadow-glow: 0 0 40px rgba(13,110,253,.15);

    /* 过渡 */
    --ease: cubic-bezier(0.16, 1, 0.3, 1);
    --t-fast: 0.2s var(--ease);
    --t-base: 0.35s var(--ease);
    --t-slow: 0.6s var(--ease);

    /* 布局 —— 更宽更大气 */
    --container: 1200px;
    --container-wide: 1400px; /* drplc风格宽版容器 */
    --nav-h: 72px;
}

/* ---- Reset ---- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
    font-family: var(--font-sans);
    font-size: 16px;
    line-height: 1.7;
    color: var(--c-text);
    background: var(--c-bg);
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
}
img, svg { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; transition: color var(--t-fast); }
ul, ol { list-style: none; }
button { font: inherit; cursor: pointer; border: none; background: none; }
input, textarea, select { font: inherit; color: inherit; }

/* ---- 容器 ---- */
.container { max-width: var(--container); margin: 0 auto; padding: 0 var(--sp-6); }
.container-wide { max-width: var(--container-wide); margin: 0 auto; padding: 0 var(--sp-8); }

/* ---- 排版 ---- */
h1, h2, h3, h4 { line-height: 1.25; font-weight: 700; color: #fff; letter-spacing: -0.01em; }
h1 { font-size: clamp(2rem, 5vw, 3.5rem); }
h2 { font-size: clamp(1.6rem, 3.5vw, 2.5rem); }
h3 { font-size: clamp(1.25rem, 2.5vw, 1.75rem); }
p  { color: var(--c-text-light); }
.text-light { color: var(--c-text-light); }
.text-lighter { color: var(--c-text-lighter); }
.text-white { color: #fff; }
.text-center { text-align: center; }
.text-gradient {
    background: linear-gradient(135deg, var(--c-primary) 0%, var(--c-primary-light) 100%);
    -webkit-background-clip: text; background-clip: text;
    -webkit-text-fill-color: transparent;
}

/* ---- 区块 ---- */
section { padding: var(--sp-16) 0; position: relative; }
.section-sm { padding: var(--sp-12) 0; }
.section-dark { background: var(--c-dark); color: var(--c-text-light); }
.section-dark h1, .section-dark h2, .section-dark h3 { color: #fff; }
.section-alt { background: var(--c-bg-alt); }
.section-alt h1, .section-alt h2, .section-alt h3 { color: #fff; }
.section-alt p { color: var(--c-text-light); }

/* 板块间微妙分隔线（统一暗色背景） */
.section-dark + .section-dark::before,
.section-dark + .section-alt::before,
.section-alt + .section-dark::before,
.section-alt + .section-alt::before,
.section-dark + .section-about-band::before {
    content: ''; position: absolute; top: 0; left: 0; right: 0; height: 1px;
    background: linear-gradient(90deg, transparent, rgba(148,163,184,.12), transparent);
    pointer-events: none; z-index: 0;
}

/* 区块标题 */
.section-head { text-align: center; max-width: 720px; margin: 0 auto var(--sp-10); }
.section-head .eyebrow {
    display: inline-block; font-size: 0.8rem; font-weight: 600;
    letter-spacing: 0.15em; text-transform: uppercase;
    color: var(--c-primary); margin-bottom: var(--sp-3);
}
.section-head h2 { margin-bottom: var(--sp-4); }
.section-head p { font-size: 1.05rem; }

/* ---- 按钮（暗色主题适配） ---- */
.btn {
    display: inline-flex; align-items: center; gap: var(--sp-2);
    padding: 0.7rem 1.6rem; border-radius: var(--r-md);
    font-weight: 600; font-size: 0.95rem;
    transition: all var(--t-base); white-space: nowrap;
}
.btn-primary {
    background: linear-gradient(135deg, var(--c-primary), var(--c-primary-dark));
    color: #fff;
    box-shadow: 0 4px 14px rgba(14,165,233,.35);
}
.btn-primary:hover { background: var(--c-primary-dark); transform: translateY(-2px); box-shadow: 0 8px 24px rgba(14,165,233,.5); }
.btn-outline {
    border: 2px solid rgba(148,163,184,.25); color: var(--c-text); background: transparent;
}
.btn-outline:hover { border-color: var(--c-primary); color: var(--c-primary); }
.btn-light { background: rgba(255,255,255,.08); color: #fff; border: 1px solid rgba(255,255,255,.12); backdrop-filter: blur(10px); }
.btn-light:hover { background: rgba(255,255,255,.15); transform: translateY(-2px); }
.btn-lg { padding: 0.9rem 2.2rem; font-size: 1.05rem; }
.btn-arrow::after { content: '→'; transition: transform var(--t-fast); }
.btn-arrow:hover::after { transform: translateX(4px); }

/* ---- 导航栏（暗色主题） ---- */
.navbar {
    position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
    height: var(--nav-h);
    background: rgba(10,22,40,.88);
    backdrop-filter: blur(24px) saturate(180%);
    border-bottom: 1px solid rgba(148,163,184,.08);
    transition: all var(--t-base);
}
.navbar.scrolled { border-bottom-color: rgba(148,163,184,.15); box-shadow: 0 4px 24px rgba(0,0,0,.3); }
.navbar .container { display: flex; align-items: center; justify-content: space-between; height: 100%; }
.nav-logo { display: flex; align-items: center; gap: var(--sp-3); }
.nav-logo .logo-icon { height: 52px; width: auto; object-fit: contain; }
.logo-text-group {
    display: flex;
    flex-direction: column;
    line-height: 1.15;
    border-left: 1px solid rgba(255,255,255,.12);
    padding-left: var(--sp-3);
}
.logo-text-cn {
    font-size: 1.05rem;
    font-weight: 700;
    color: #fff;
    letter-spacing: 0.06em;
    white-space: nowrap;
    margin-bottom: 6px;
}
.logo-text-en {
    font-size: 0.68rem;
    font-weight: 500;
    color: rgba(148,163,184,.7);
    letter-spacing: 0.18em;
    white-space: nowrap;
    text-transform: uppercase;
}
.nav-links { display: flex; align-items: center; gap: var(--sp-6); }
.nav-links a {
    font-weight: 500; font-size: 0.95rem; color: var(--c-text-light);
    position: relative; padding: var(--sp-2) 0;
}
.nav-links a::after {
    content: ''; position: absolute; bottom: 0; left: 0;
    width: 0; height: 2px; background: var(--c-primary);
    transition: width var(--t-base);
}
.nav-links a:hover, .nav-links a.active { color: #fff; }
.nav-links a:hover::after, .nav-links a.active::after { width: 100%; }
.nav-cta { display: flex; align-items: center; gap: var(--sp-3); }
.nav-toggle { display: none; flex-direction: column; gap: 5px; padding: var(--sp-2); }
.nav-toggle span { width: 24px; height: 2px; background: var(--c-text); transition: all var(--t-base); border-radius: 2px; }
.nav-toggle.active span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.active span:nth-child(2) { opacity: 0; }
.nav-toggle.active span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* 移动端菜单（暗色主题） */
.mobile-menu {
    position: fixed; top: var(--nav-h); left: 0; right: 0;
    background: rgba(15,23,42,.98); padding: var(--sp-6);
    box-shadow: var(--shadow-xl); z-index: 999;
    transform: translateY(-120%); opacity: 0;
    transition: all var(--t-base); pointer-events: none;
    backdrop-filter: blur(20px);
}
.mobile-menu.open { transform: translateY(0); opacity: 1; pointer-events: auto; }
.mobile-menu a { display: block; padding: var(--sp-4) 0; border-bottom: 1px solid rgba(148,163,184,.1); font-weight: 500; color: var(--c-text-light); }
.mobile-menu a:last-child { border-bottom: none; }
.mobile-menu a:hover { color: #fff; }

/* ---- Hero ---- */
.hero {
    position: relative; min-height: 100vh; display: flex; align-items: center;
    background: linear-gradient(135deg, #0f172a 0%, #1e293b 50%, #1e3a5f 100%);
    overflow: hidden; padding-top: var(--nav-h);
}
.hero::before {
    content: ''; position: absolute; inset: 0;
    background-image:
        radial-gradient(circle at 20% 30%, rgba(13,110,253,.15) 0%, transparent 40%),
        radial-gradient(circle at 80% 70%, rgba(245,158,11,.08) 0%, transparent 40%);
}
.hero::after {
    content: ''; position: absolute; inset: 0;
    background-image: linear-gradient(rgba(255,255,255,.03) 1px, transparent 1px),
                      linear-gradient(90deg, rgba(255,255,255,.03) 1px, transparent 1px);
    background-size: 60px 60px;
    mask-image: radial-gradient(ellipse at center, #000 30%, transparent 70%);
}
.hero .container { position: relative; z-index: 2; display: grid; grid-template-columns: 1.1fr 0.9fr; gap: var(--sp-10); align-items: center; }
.hero-content { color: #fff; }
.hero-eyebrow {
    display: inline-flex; align-items: center; gap: var(--sp-2);
    padding: 0.4rem 1rem; border-radius: var(--r-full);
    background: rgba(13,110,253,.15); border: 1px solid rgba(13,110,253,.3);
    font-size: 0.85rem; font-weight: 500; color: #93c5fd; margin-bottom: var(--sp-5);
}
.hero h1 { color: #fff; margin-bottom: var(--sp-5); font-size: clamp(2.2rem, 5vw, 3.8rem); line-height: 1.15; }
.hero h1 .highlight { color: #fbbf24; }
.hero-desc { font-size: 1.15rem; color: #cbd5e1; margin-bottom: var(--sp-8); max-width: 540px; }
.hero-actions { display: flex; gap: var(--sp-4); flex-wrap: wrap; }
.hero-visual { position: relative; }
.hero-visual .product-card {
    background: rgba(255,255,255,.06); border: 1px solid rgba(255,255,255,.1);
    border-radius: var(--r-xl); padding: var(--sp-6); backdrop-filter: blur(20px);
    box-shadow: var(--shadow-xl); transform: rotate(-2deg); transition: transform var(--t-slow);
}
.hero-visual .product-card:hover { transform: rotate(0deg) scale(1.02); }
.hero-visual .product-card img { border-radius: var(--r-lg); width: 100%; }
.hero-visual .floating-badge {
    position: absolute; top: -16px; right: -16px;
    background: var(--c-accent); color: #fff; font-weight: 700; font-size: 0.85rem;
    padding: 0.5rem 1rem; border-radius: var(--r-full); box-shadow: var(--shadow-lg);
}
/* ---- Hero 数据统计卡片（暗色主题） ---- */
.hero-stats {
    position: absolute; bottom: -24px; left: -24px;
    background: rgba(15,23,42,.92); border: 1px solid rgba(14,165,233,.2);
    border-radius: var(--r-lg); padding: var(--sp-5);
    box-shadow: 0 12px 40px rgba(0,0,0,.4); display: flex; gap: var(--sp-6);
    backdrop-filter: blur(16px);
}
.hero-stats .stat-num { font-size: 1.5rem; font-weight: 800; color: var(--c-primary); }
.hero-stats .stat-label { font-size: 0.75rem; color: var(--c-text-light); }

/* 滚动提示 */
.scroll-hint {
    position: absolute; bottom: var(--sp-8); left: 50%; transform: translateX(-50%);
    color: rgba(255,255,255,.5); font-size: 0.8rem; z-index: 2;
    display: flex; flex-direction: column; align-items: center; gap: var(--sp-2);
}
.scroll-hint .line { width: 1px; height: 40px; background: linear-gradient(to bottom, rgba(255,255,255,.4), transparent); animation: scrollLine 2s infinite; }
@keyframes scrollLine { 0%,100% { opacity: 0.3; transform: scaleY(0.5); } 50% { opacity: 1; transform: scaleY(1); } }

/* ---- 特性卡片（暗色主题） ---- */
.features-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--sp-5); }
.feature-card {
    background: rgba(30,41,59,.6); border: 1px solid rgba(148,163,184,.1);
    border-radius: var(--r-lg);
    padding: var(--sp-6); transition: all var(--t-base); position: relative; overflow: hidden;
}
.feature-card::before {
    content: ''; position: absolute; top: 0; left: 0; right: 0; height: 3px;
    background: linear-gradient(90deg, var(--c-primary), var(--c-primary-light));
    transform: scaleX(0); transform-origin: left; transition: transform var(--t-base);
}
.feature-card:hover { transform: translateY(-6px); box-shadow: 0 12px 40px rgba(14,165,233,.15); border-color: rgba(14,165,233,.3); }
.feature-card:hover::before { transform: scaleX(1); }
.feature-icon {
    width: 52px; height: 52px; border-radius: var(--r-md);
    background: linear-gradient(135deg, rgba(14,165,233,.15), rgba(56,189,248,.1));
    display: flex; align-items: center; justify-content: center; margin-bottom: var(--sp-4);
}
.feature-icon svg { width: 28px; height: 28px; color: var(--c-primary); }
.feature-card h3 { font-size: 1.15rem; margin-bottom: var(--sp-2); color: #fff; }
.feature-card p { font-size: 0.92rem; color: var(--c-text-light); }

/* ---- 产品卡片（暗色主题） ---- */
.products-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--sp-6); }
.product-card {
    background: rgba(30,41,59,.65); border: 1px solid rgba(148,163,184,.12);
    border-radius: var(--r-lg);
    overflow: hidden; transition: all var(--t-base); display: flex; flex-direction: column;
}
.product-card:hover { transform: translateY(-8px); box-shadow: 0 20px 60px rgba(14,165,233,.12); border-color: rgba(14,165,233,.3); }
.product-img-wrap {
    aspect-ratio: 4/3; overflow: hidden; background: rgba(15,23,42,.5); position: relative;
}
.product-img-wrap img { width: 100%; height: 100%; object-fit: contain; padding: var(--sp-5); transition: transform var(--t-slow); }
.product-card:hover .product-img-wrap img { transform: scale(1.08); }
.product-badge {
    position: absolute; top: var(--sp-3); left: var(--sp-3);
    background: var(--c-primary); color: #fff; font-size: 0.75rem; font-weight: 600;
    padding: 0.3rem 0.8rem; border-radius: var(--r-full);
}
.product-badge.featured { background: var(--c-accent); }
.product-info { padding: var(--sp-5); flex: 1; display: flex; flex-direction: column; }
.product-cat { font-size: 0.8rem; color: var(--c-primary); font-weight: 600; margin-bottom: var(--sp-2); }
.product-info h3 { font-size: 1.2rem; margin-bottom: var(--sp-2); color: #fff; }
.product-info .summary { font-size: 0.92rem; color: var(--c-text-light); margin-bottom: var(--sp-4); flex: 1; }
.product-footer { display: flex; justify-content: space-between; align-items: center; padding-top: var(--sp-4); border-top: 1px solid rgba(148,163,184,.1); }
.product-model { font-family: var(--font-mono); font-size: 0.85rem; color: var(--c-text-lighter); }
.product-link { color: var(--c-primary); font-weight: 600; font-size: 0.9rem; }

/* ---- 分类筛选 ---- */
.category-filter { display: flex; gap: var(--sp-3); justify-content: center; flex-wrap: wrap; margin-bottom: var(--sp-10); }
.category-filter button {
    padding: 0.5rem 1.4rem; border-radius: var(--r-full); border: 1px solid var(--c-border);
    font-weight: 500; font-size: 0.9rem; color: var(--c-text-light); transition: all var(--t-fast);
}
.category-filter button.active, .category-filter button:hover {
    background: var(--c-primary); color: #fff; border-color: var(--c-primary);
}

/* ---- 关于我们 ---- */
.about-hero { display: grid; grid-template-columns: 1fr 1fr; gap: var(--sp-10); align-items: center; }
.about-hero-text h2 { margin-bottom: var(--sp-5); }
.about-hero-text p { margin-bottom: var(--sp-4); font-size: 1.02rem; }
.about-hero-img { border-radius: var(--r-xl); overflow: hidden; box-shadow: var(--shadow-xl); position: relative; }
.about-hero-img::after { content: ''; position: absolute; inset: 0; background: linear-gradient(135deg, transparent 50%, rgba(13,110,253,.15)); }

/* 价值观卡片 */
.values-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--sp-5); }
.value-card { text-align: center; padding: var(--sp-8) var(--sp-5); }
.value-num { font-size: 3rem; font-weight: 800; color: var(--c-primary); opacity: 0.15; margin-bottom: var(--sp-2); }
.value-card h3 { margin-bottom: var(--sp-3); }

/* 数据统计条 */
.stats-bar { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--sp-6); }
.stat-item { text-align: center; }
.stat-item .num { font-size: clamp(2rem, 4vw, 3.2rem); font-weight: 800; color: #fff; line-height: 1; }
.stat-item .num .unit { font-size: 1.2rem; color: var(--c-accent); }
.stat-item .label { color: #94a3b8; font-size: 0.95rem; margin-top: var(--sp-2); }

/* 优势列表 */
.advantage-list { display: grid; grid-template-columns: 1fr 1fr; gap: var(--sp-5); }
.advantage-item { display: flex; gap: var(--sp-4); padding: var(--sp-5); background: var(--c-bg-alt); border-radius: var(--r-lg); border-left: 3px solid var(--c-primary); transition: all var(--t-base); }
.advantage-item:hover { background: var(--c-dark-3); box-shadow: 0 8px 24px rgba(0,0,0,.3); transform: translateX(4px); border-left-color: var(--c-accent); }
.advantage-item .check { width: 28px; height: 28px; border-radius: var(--r-full); background: var(--c-primary); color: #fff; display: flex; align-items: center; justify-content: center; flex-shrink: 0; font-size: 0.85rem; }
.advantage-item h4 { font-size: 1.05rem; margin-bottom: var(--sp-1); }
.advantage-item p { font-size: 0.9rem; }

/* ---- 产品详情 ---- */
.product-detail { display: grid; grid-template-columns: 1fr 1fr; gap: var(--sp-10); }
.product-gallery-main { border-radius: var(--r-lg); overflow: hidden; background: var(--c-bg-alt); aspect-ratio: 1; }
.product-gallery-main img { width: 100%; height: 100%; object-fit: contain; padding: var(--sp-8); }
.product-thumbs { display: flex; gap: var(--sp-3); margin-top: var(--sp-4); }
.product-thumbs img { width: 80px; height: 80px; object-fit: contain; border-radius: var(--r-md); border: 2px solid var(--c-border); background: var(--c-bg-alt); padding: var(--sp-2); cursor: pointer; transition: border-color var(--t-fast); }
.product-thumbs img.active, .product-thumbs img:hover { border-color: var(--c-primary); }
.product-detail-info h1 { margin-bottom: var(--sp-3); }
.product-meta { display: flex; gap: var(--sp-4); margin-bottom: var(--sp-5); flex-wrap: wrap; }
.product-meta span { font-size: 0.9rem; color: var(--c-text-light); }
.product-meta strong { color: var(--c-text); }
.spec-table { width: 100%; border-collapse: collapse; margin: var(--sp-5) 0; }
.spec-table th, .spec-table td { padding: var(--sp-3) var(--sp-4); border-bottom: 1px solid var(--c-border); text-align: left; }
.spec-table th { width: 140px; color: var(--c-text-light); font-weight: 500; background: var(--c-bg-alt); }
.spec-table td { font-weight: 500; }
.features-checklist { display: grid; grid-template-columns: 1fr 1fr; gap: var(--sp-3); margin: var(--sp-5) 0; }
.features-checklist li { display: flex; align-items: center; gap: var(--sp-2); font-size: 0.95rem; }
.features-checklist li::before { content: '✓'; color: var(--c-primary); font-weight: 700; }

/* ---- 联系页面（暗色主题） ---- */
.contact-grid { display: grid; grid-template-columns: 1fr 1.2fr; gap: var(--sp-10); }
.contact-info-list { display: flex; flex-direction: column; gap: var(--sp-5); }
.contact-info-item { display: flex; gap: var(--sp-4); align-items: flex-start; }
.contact-info-item .ico {
    width: 48px; height: 48px; border-radius: var(--r-md);
    background: linear-gradient(135deg, rgba(14,165,233,.15), rgba(56,189,248,.1));
    display: flex; align-items: center; justify-content: center; flex-shrink: 0;
}
.contact-info-item .ico svg { width: 24px; height: 24px; color: var(--c-primary); }
.contact-info-item h4 { font-size: 1rem; margin-bottom: var(--sp-1); color: #fff; }
.contact-info-item p { font-size: 0.95rem; color: var(--c-text-light); }
.contact-form {
    background: rgba(30,41,59,.7); border: 1px solid rgba(148,163,184,.12);
    border-radius: var(--r-xl); padding: var(--sp-8);
    box-shadow: 0 20px 60px rgba(0,0,0,.3);
    backdrop-filter: blur(10px);
}
.contact-form h2 { color: #fff; margin-bottom: var(--sp-6); font-size: 1.5rem; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: var(--sp-4); }
.form-group { margin-bottom: var(--sp-4); }
.form-group label { display: block; font-weight: 500; font-size: 0.9rem; margin-bottom: var(--sp-2); color: var(--c-text-light); }
.form-group input, .form-group textarea, .form-group select {
    width: 100%; padding: 0.75rem 1rem;
    border: 1px solid rgba(148,163,184,.15); border-radius: var(--r-md);
    background: rgba(15,23,42,.6); color: var(--c-text);
    transition: all var(--t-fast); font-size: 0.95rem;
}
.form-group input:focus, .form-group textarea:focus, .form-group select:focus {
    outline: none; border-color: var(--c-primary);
    box-shadow: 0 0 0 3px rgba(14,165,233,.15); background: rgba(15,23,42,.8);
}
.form-group textarea { resize: vertical; min-height: 130px; }
.form-group .required { color: #f87171; margin-left: 2px; }
.form-success {
    background: rgba(16,185,129,.1); border: 1px solid rgba(16,185,129,.3); color: #34d399;
    padding: var(--sp-4); border-radius: var(--r-md); margin-bottom: var(--sp-5);
    display: none; font-size: 0.95rem;
}
.form-success.show { display: block; }

/* 地图（暗色主题） */
.map-wrap { border-radius: var(--r-lg); overflow: hidden; box-shadow: 0 12px 40px rgba(0,0,0,.3); border: 1px solid rgba(148,163,184,.1); }
.map-wrap iframe { width: 100%; height: 380px; border: 0; display: block; filter: grayscale(.3) brightness(.9); }

/* ---- 页脚（暗色主题微调） ---- */
.footer { background: var(--c-dark); color: var(--c-text-light); padding: var(--sp-12) 0 var(--sp-6); border-top: 1px solid rgba(148,163,184,.08); }
.footer-grid { display: grid; grid-template-columns: 1.5fr 1fr 1fr 1fr; gap: var(--sp-8); margin-bottom: var(--sp-10); }
.footer-brand p { color: var(--c-text-light); font-size: 0.9rem; margin: var(--sp-4) 0; max-width: 300px; }
.footer-col h4 { color: #fff; font-size: 1rem; margin-bottom: var(--sp-4); }
.footer-col ul li { margin-bottom: var(--sp-3); }
.footer-col ul li a { font-size: 0.9rem; color: var(--c-text-lighter); transition: color var(--t-fast); }
.footer-col ul li a:hover { color: var(--c-primary); }
.footer-contact li { display: flex; gap: var(--sp-2); font-size: 0.88rem; margin-bottom: var(--sp-3); align-items: flex-start; color: var(--c-text-lighter); }
.footer-bottom { border-top: 1px solid rgba(148,163,184,.08); padding-top: var(--sp-6); display: flex; justify-content: space-between; align-items: center; font-size: 0.85rem; flex-wrap: wrap; gap: var(--sp-3); color: var(--c-text-lighter); }
.footer-bottom a { color: var(--c-text-lighter); }
.footer-bottom a:hover { color: var(--c-primary); }

/* ---- 面包屑（暗色主题） ---- */
.breadcrumb { padding: calc(var(--nav-h) + var(--sp-8)) 0 var(--sp-8); background: rgba(15,23,42,.6); border-bottom: 1px solid rgba(148,163,184,.08); }
.breadcrumb .container { display: flex; align-items: center; gap: var(--sp-2); font-size: 0.9rem; color: var(--c-text-lighter); }
.breadcrumb a:hover { color: var(--c-primary); }
.breadcrumb .sep { color: var(--c-text-lighter); }
.breadcrumb .current { color: var(--c-text); }

/* ---- 页面横幅 ---- */
.page-banner { padding: calc(var(--nav-h) + var(--sp-12)) 0 var(--sp-12); background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%); color: #fff; text-align: center; position: relative; overflow: hidden; }
.page-banner::before { content: ''; position: absolute; inset: 0; background-image: radial-gradient(circle at 50% 0%, rgba(13,110,253,.2), transparent 60%); }
.page-banner .container { position: relative; z-index: 2; }
.page-banner h1 { color: #fff; margin-bottom: var(--sp-3); }
.page-banner p { color: #cbd5e1; font-size: 1.1rem; }

/* ---- CTA 留言表单区（暗色主题） ---- */
.cta-band {
    background: linear-gradient(135deg, #0c1929 0%, var(--c-dark) 40%, #0d2137 100%);
    color: #fff; padding: var(--sp-14) 0;
    position: relative; overflow: hidden;
}
.cta-band::before {
    content: ''; position: absolute; inset: 0;
    background-image:
        radial-gradient(circle at 10% 20%, rgba(14,165,233,.08) 0%, transparent 45%),
        radial-gradient(circle at 90% 80%, rgba(34,211,238,.05) 0%, transparent 40%);
}
.cta-form-wrap {
    display: grid;
    grid-template-columns: 1.3fr 1fr;
    gap: var(--sp-8);
    align-items: start;
    position: relative; z-index: 2;
}

/* 左侧表单卡片 */
.cta-form-card {
    background: rgba(255,255,255,.03);
    border: 1px solid rgba(255,255,255,.08);
    border-radius: var(--r-lg);
    padding: var(--sp-8);
    backdrop-filter: blur(12px);
}
.cta-form-head {
    display: flex; align-items: center; gap: var(--sp-3);
    font-size: 1.35rem; font-weight: 700; color: #fff;
    margin-bottom: var(--sp-2);
}
.cta-form-head svg { color: var(--c-primary); }
.cta-form-desc {
    color: var(--c-text-light); font-size: 0.92rem;
    margin-bottom: var(--sp-6); line-height: 1.6;
}

/* 表单字段 */
.form-field { margin-bottom: var(--sp-4); }
.form-field label {
    display: flex; align-items: center; gap: 0.4rem;
    font-size: 0.88rem; font-weight: 600; color: var(--c-text);
    margin-bottom: 0.5rem;
}
.form-field label svg { color: var(--c-primary); opacity: .8; }
.form-field input,
.form-field textarea {
    width: 100%;
    padding: 0.85rem 1rem;
    background: rgba(15,23,42,.6);
    border: 1px solid rgba(148,163,184,.2);
    border-radius: var(--r-md);
    color: #e2e8f0; font-size: 0.95rem;
    transition: all var(--t-base);
    outline: none; box-sizing: border-box;
}
.form-field input::placeholder,
.form-field textarea::placeholder { color: var(--c-text-lighter); }
.form-field input:focus,
.form-field textarea:focus {
    border-color: var(--c-primary);
    box-shadow: 0 0 0 3px rgba(14,165,233,.15);
    background: rgba(15,23,42,.8);
}
.form-field textarea { resize: vertical; min-height: 80px; line-height: 1.6; }

/* 提交按钮 */
.btn-submit {
    width: 100%;
    padding: 0.9rem;
    background: var(--c-primary);
    color: #fff !important;
    font-size: 1rem; font-weight: 700;
    border: none; border-radius: var(--r-md);
    cursor: pointer;
    transition: all var(--t-base);
    letter-spacing: 0.06em;
}
.btn-submit:hover:not(:disabled) {
    background: #0284c7;
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(14,165,233,.35);
}
.btn-submit:disabled { opacity: .6; cursor: not-allowed; }

/* 表单结果提示 */
.form-result {
    margin-top: var(--sp-4); padding: 0.8rem 1rem;
    border-radius: var(--r-sm); font-size: 0.9rem; text-align: center;
    display: none;
}
.form-result.success {
    display: block; background: rgba(16,185,129,.12);
    color: #34d399; border: 1px solid rgba(16,185,129,.25);
}
.form-result.error {
    display: block; background: rgba(239,68,68,.12);
    color: #fca5a5; border: 1px solid rgba(239,68,68,.25);
}

/* 右侧联系方式 */
.cta-contact-info {
    display: flex;
    flex-direction: column;
    gap: var(--sp-5);
    padding-top: var(--sp-6);
}
.contact-card {
    display: flex; align-items: center; gap: var(--sp-4);
    padding: var(--sp-5) var(--sp-6);
    background: rgba(255,255,255,.03);
    border: 1px solid rgba(255,255,255,.08);
    border-radius: var(--r-md);
    transition: all var(--t-base);
}
.contact-card:hover {
    border-color: var(--c-primary);
    background: rgba(14,165,233,.04);
}
.contact-icon {
    display: flex; align-items: center; justify-content: center;
    width: 48px; height: 48px; border-radius: var(--r-md);
    background: rgba(14,165,233,.1);
    color: var(--c-primary);
    flex-shrink: 0;
}
.contact-card span {
    font-size: 1.05rem; font-weight: 600; color: #e2e8f0;
    letter-spacing: 0.03em;
}

/* 响应式：留言表单 */
@media (max-width: 900px) {
    .cta-form-wrap { grid-template-columns: 1fr; gap: var(--sp-6); }
    .cta-contact-info {
        flex-direction: row; padding-top: 0;
        justify-content: stretch;
    }
    .contact-card { flex: 1; justify-content: center; }
}
@media (max-width: 550px) {
    .cta-band { padding: var(--sp-8) 0; }
    .cta-form-card { padding: var(--sp-5); }
    .cta-contact-info { flex-direction: column; }
}

/* ---- 滚动动画 ---- */
[data-aos] { opacity: 0; transform: translateY(30px); transition: opacity 0.8s var(--ease), transform 0.8s var(--ease); }
[data-aos].aos-in { opacity: 1; transform: translateY(0); }
[data-aos="fade-left"] { transform: translateX(-30px); }
[data-aos="fade-right"] { transform: translateX(30px); }
[data-aos="fade-left"].aos-in, [data-aos="fade-right"].aos-in { transform: translateX(0); }
[data-aos-delay="100"] { transition-delay: 0.1s; }
[data-aos-delay="200"] { transition-delay: 0.2s; }
[data-aos-delay="300"] { transition-delay: 0.3s; }
[data-aos-delay="400"] { transition-delay: 0.4s; }

/* ---- 响应式 ---- */
@media (max-width: 1024px) {
    .features-grid, .products-grid { grid-template-columns: repeat(2, 1fr); }
    .stats-bar { grid-template-columns: repeat(2, 1fr); gap: var(--sp-6); }
    .hero .container { grid-template-columns: 1fr; }
    .hero-visual { display: none; }
    .about-hero, .product-detail, .contact-grid { grid-template-columns: 1fr; }
    .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
    :root { --nav-h: 64px; }
    section { padding: var(--sp-12) 0; }
    .nav-links, .nav-cta .btn { display: none; }
    .nav-toggle { display: flex; }
    .features-grid, .products-grid, .values-grid, .advantage-list, .form-row, .features-checklist { grid-template-columns: 1fr; }
    .stats-bar { grid-template-columns: 1fr 1fr; }
    .footer-grid { grid-template-columns: 1fr; }
    .footer-bottom { flex-direction: column; text-align: center; }
    .hero-actions { flex-direction: column; }
    .hero-actions .btn { width: 100%; justify-content: center; }
    .container { padding: 0 var(--sp-4); }
    .contact-form { padding: var(--sp-5); }
}

@media (max-width: 480px) {
    .stats-bar { grid-template-columns: 1fr; }
    .hero-stats { display: none; }
}

/* ===== 首页 Hero 视频 / 动态背景 ===== */
.hero-media .hero-video,
.hero-media .hero-bg-image {
    position: absolute; inset: 0; width: 100%; height: 100%;
    object-fit: cover; z-index: 0;
}
.hero-bg-image {
    background-size: cover; background-position: center;
    transform: scale(1.05); animation: heroZoom 20s ease-in-out infinite alternate;
}
@keyframes heroZoom { from { transform: scale(1.05); } to { transform: scale(1.15); } }
.hero-overlay {
    position: absolute; inset: 0; z-index: 1;
    background: linear-gradient(120deg, rgba(15,23,42,.92) 0%, rgba(15,23,42,.7) 50%, rgba(30,58,95,.55) 100%);
}
.hero-media .container { z-index: 2; position: relative; }
.hero-media .hero-content { max-width: 660px; }
.hero-stats-inline {
    display: flex; gap: var(--sp-8); margin-top: var(--sp-8);
    padding-top: var(--sp-6); border-top: 1px solid rgba(255,255,255,.15);
}
.hero-stats-inline > div { display: flex; flex-direction: column; gap: 0.25rem; }
.hero-stats-inline strong { font-size: 1.8rem; font-weight: 800; color: #fbbf24; }
.hero-stats-inline span:last-child { font-size: 0.8rem; color: #94a3b8; }

/* ===== 文章资讯板块（横向自动滚动） ===== */
.articles-scroll-wrap {
    position: relative;
    overflow: hidden;
}
.articles-scroll-track {
    display: flex;
    gap: var(--sp-6);
    animation: scrollArticles 30s linear infinite;
    width: max-content;
    padding-bottom: 1rem;
}
.articles-scroll-wrap:hover .articles-scroll-track {
    animation-play-state: paused;
}
@keyframes scrollArticles {
    0%   { transform: translateX(0); }
    100% { transform: translateX(-50%); }
}
.articles-scroll-wrap .articles-grid {
    display: flex;
    gap: var(--sp-6);
    flex-wrap: nowrap;
}
.articles-scroll-wrap .article-card {
    width: 360px;
    flex-shrink: 0;
}
.article-card {
    display: flex; flex-direction: column;
    background: rgba(30,41,59,.65); border-radius: var(--r-lg); overflow: hidden;
    box-shadow: 0 4px 16px rgba(0,0,0,.2); border: 1px solid rgba(148,163,184,.1);
    transition: all var(--t-base); text-decoration: none; color: inherit;
}
.article-card:hover {
    transform: translateY(-6px); box-shadow: 0 20px 60px rgba(14,165,233,.12);
    border-color: rgba(14,165,233,.3);
}
.article-cover {
    position: relative; aspect-ratio: 16/9; overflow: hidden; background: rgba(15,23,42,.5);
}
.article-cover img {
    width: 100%; height: 100%; object-fit: cover;
    transition: transform var(--t-slow);
}
.article-card:hover .article-cover img { transform: scale(1.08); }
.article-cover-placeholder {
    width: 100%; height: 100%; display: flex; align-items: center; justify-content: center;
    color: var(--c-text-lighter); background: linear-gradient(135deg, rgba(30,41,59,.8), rgba(15,23,42,.6));
}
.article-cover-placeholder svg { width: 3rem; height: 3rem; }
.article-cat {
    position: absolute; top: var(--sp-3); left: var(--sp-3);
    background: rgba(14,165,233,.92); color: #fff; font-size: 0.75rem; font-weight: 600;
    padding: 0.25rem 0.75rem; border-radius: var(--r-full); backdrop-filter: blur(8px);
}
.article-body { padding: var(--sp-5); display: flex; flex-direction: column; flex: 1; }
.article-body h3 {
    font-size: 1.1rem; font-weight: 700; margin-bottom: var(--sp-3);
    color: #fff; line-height: 1.4;
    display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden;
}
.article-summary {
    font-size: 0.9rem; color: var(--c-text-light); margin-bottom: var(--sp-4); flex: 1;
    display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden;
}
.article-meta {
    display: flex; justify-content: space-between; align-items: center;
    font-size: 0.8rem; color: var(--c-text-lighter);
    padding-top: var(--sp-3); border-top: 1px solid rgba(148,163,184,.1);
}

/* ===== 页面顶部 Hero（文章/其他内页） ===== */
.page-hero {
    position: relative; padding: calc(var(--nav-h) + 4rem) 0 4rem;
    background: linear-gradient(135deg, #0f172a 0%, #1e293b 50%, #1e3a5f 100%);
    color: #fff; text-align: center; overflow: hidden;
}
.page-hero::before {
    content: ''; position: absolute; inset: 0;
    background-image:
        radial-gradient(circle at 20% 30%, rgba(13,110,253,.15) 0%, transparent 40%),
        radial-gradient(circle at 80% 70%, rgba(245,158,11,.08) 0%, transparent 40%);
}
.page-hero .container { position: relative; z-index: 1; }
.page-hero .eyebrow { color: #93c5fd; }
.page-hero h1 { color: #fff; font-size: clamp(2rem, 4vw, 3rem); margin: var(--sp-3) 0; }
.page-hero p { color: #cbd5e1; font-size: 1.1rem; }

/* ===== 分类筛选标签 ===== */
.filter-tabs {
    display: flex; gap: var(--sp-2); flex-wrap: wrap; justify-content: center;
}
.filter-tabs a {
    padding: 0.5rem 1.25rem; border-radius: var(--r-full);
    background: var(--c-dark-3); border: 1px solid var(--c-border); color: var(--c-text-light);
    font-size: 0.9rem; font-weight: 500; transition: all var(--t-base); text-decoration: none;
}
.filter-tabs a:hover { border-color: var(--c-primary); color: var(--c-primary); }
.filter-tabs a.active { background: var(--c-primary); border-color: var(--c-primary); color: #fff; }

/* ===== 文章详情页 ===== */
.container-narrow { max-width: 800px; }
.article-detail { padding: 3rem 0 4rem; }
.article-back { margin-bottom: var(--sp-6); }
.article-back a { color: var(--c-text-light); font-size: 0.9rem; text-decoration: none; transition: color var(--t-base); }
.article-back a:hover { color: var(--c-primary); }
.article-header { margin-bottom: var(--sp-8); }
.article-cat-tag {
    display: inline-block; background: rgba(13,110,253,.1); color: var(--c-primary);
    font-size: 0.8rem; font-weight: 600; padding: 0.3rem 0.9rem;
    border-radius: var(--r-full); margin-bottom: var(--sp-4);
}
.article-header h1 {
    font-size: clamp(1.6rem, 3.5vw, 2.4rem); line-height: 1.3;
    margin-bottom: var(--sp-4); color: var(--c-text);
}
.article-info { color: var(--c-text-lighter); font-size: 0.9rem; display: flex; gap: var(--sp-3); flex-wrap: wrap; }
.article-cover-large {
    margin-bottom: var(--sp-8); border-radius: var(--r-lg); overflow: hidden;
    box-shadow: var(--shadow-lg);
}
.article-cover-large img { width: 100%; display: block; }

/* 文章正文排版（图文混排，支持富文本编辑器输出） */
.article-content { font-size: 1.05rem; line-height: 1.85; color: var(--c-text); }
.article-content p { margin-bottom: var(--sp-5); }
.article-content h2 { font-size: 1.6rem; margin: var(--sp-7) 0 var(--sp-4); color: var(--c-text); }
.article-content h3 { font-size: 1.3rem; margin: var(--sp-6) 0 var(--sp-3); color: var(--c-text); }
.article-content h4 { font-size: 1.1rem; margin: var(--sp-5) 0 var(--sp-3); color: var(--c-text); }
.article-content img {
    max-width: 100%; height: auto; border-radius: var(--r-md);
    margin: var(--sp-5) 0; box-shadow: var(--shadow-md); display: block;
}
.article-content ul, .article-content ol { margin: var(--sp-4) 0 var(--sp-5); padding-left: 1.5rem; }
.article-content li { margin-bottom: var(--sp-2); }
.article-content blockquote {
    border-left: 4px solid var(--c-primary); padding: var(--sp-3) var(--sp-5);
    margin: var(--sp-5) 0; background: var(--c-bg-alt); border-radius: 0 var(--r-md) var(--r-md) 0;
    color: var(--c-text-light); font-style: italic;
}
.article-content a { color: var(--c-primary); text-decoration: underline; }
.article-content table {
    width: 100%; border-collapse: collapse; margin: var(--sp-5) 0;
    border-radius: var(--r-md); overflow: hidden; box-shadow: var(--shadow-sm);
}
.article-content th, .article-content td { padding: 0.75rem 1rem; border: 1px solid var(--c-border-light); text-align: left; }
.article-content th { background: var(--c-bg-alt); font-weight: 600; }

/* 上下篇导航 */
.article-nav {
    display: grid; grid-template-columns: 1fr 1fr; gap: var(--sp-4);
    margin-top: var(--sp-10); padding-top: var(--sp-6); border-top: 1px solid var(--c-border-light);
}
.article-nav-item {
    display: flex; flex-direction: column; gap: 0.25rem;
    padding: var(--sp-4); border-radius: var(--r-md); border: 1px solid var(--c-border-light);
    text-decoration: none; transition: all var(--t-base); color: inherit;
}
.article-nav-item:hover { border-color: var(--c-primary); background: var(--c-bg-alt); }
.article-nav-item.next { text-align: right; }
.article-nav-item.disabled { opacity: 0.4; pointer-events: none; }
.nav-label { font-size: 0.75rem; color: var(--c-text-lighter); text-transform: uppercase; letter-spacing: 0.05em; }
.nav-title { font-size: 0.95rem; font-weight: 500; color: var(--c-text); }

/* 分页 */
.pagination { display: flex; justify-content: center; margin-top: 3rem; }
.pagination a, .pagination span {
    display: inline-flex; align-items: center; justify-content: center;
    min-width: 2.5rem; height: 2.5rem; margin: 0 0.2rem; padding: 0 0.5rem;
    border-radius: var(--r-md); border: 1px solid var(--c-border);
    color: var(--c-text-light); text-decoration: none; font-size: 0.9rem; transition: all var(--t-base);
}
.pagination a:hover { border-color: var(--c-primary); color: var(--c-primary); }
.pagination .active, .pagination span.current {
    background: var(--c-primary); border-color: var(--c-primary); color: #fff;
}
.pagination .disabled { opacity: 0.4; pointer-events: none; }

/* ===== 文章列表页（4列小卡片） ===== */
.article-list-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1.5rem;
}
.article-list-card {
    background: var(--c-bg-alt);
    border: 1px solid var(--c-border);
    border-radius: var(--r-md);
    overflow: hidden;
    transition: all var(--t-base);
    text-decoration: none;
    color: inherit;
    display: flex;
    flex-direction: column;
}
.article-list-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 16px 40px rgba(0,0,0,.25);
    border-color: rgba(14,165,233,.35);
}

/* 卡片类型A：上图下文 */
.alc-type-a .alc-cover {
    position: relative;
    aspect-ratio: 4/3;
    overflow: hidden;
    background: var(--c-dark);
}
.alc-type-a .alc-cover img {
    width: 100%; height: 100%;
    object-fit: cover;
    transition: transform var(--t-slow);
}
.article-list-card:hover .alc-cover img { transform: scale(1.05); }
.alc-date-badge {
    position: absolute;
    top: 12px; left: 12px;
    background: rgba(15,23,42,.78);
    backdrop-filter: blur(8px);
    color: #fff;
    padding: 6px 10px;
    border-radius: 6px;
    display: inline-flex;
    flex-direction: column;
    align-items: center;
    line-height: 1.2;
    min-width: 52px;
}
.alc-date-badge .date-year {
    font-size: 0.95rem;
    font-weight: 700;
    display: block;
    color: var(--c-primary);
}
.alc-date-badge .date-md {
    font-size: 0.7rem;
    opacity: .85;
    display: block;
}
.alc-logo-watermark {
    position: absolute;
    bottom: 10px; right: 10px;
    width: 28px; height: 18px;
    opacity: .6;
}
.alc-body {
    padding: 1rem 1.2rem 1.2rem;
    display: flex;
    flex-direction: column;
    flex: 1;
}
.alc-body h3 {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--c-text);
    line-height: 1.5;
    margin-bottom: 0.5rem;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}
.alc-body p {
    font-size: 0.82rem;
    color: var(--c-text-light);
    line-height: 1.7;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
    flex: 1;
}

/* 卡片类型B：上文下图 */
.alc-type-b {
    display: flex;
    flex-direction: column;
}
.alc-type-b .alc-body {
    order: 1;
    padding-bottom: 0.6rem;
}
.alc-type-b .alc-body h3 {
    font-size: 1.02rem;
    -webkit-line-clamp: 2;
}
.alc-type-b .alc-cover {
    order: 2;
    aspect-ratio: 4/3;
}

/* 分页器增强 */
.article-pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 0.4rem;
    margin-top: 3rem;
    padding: 1.5rem 0;
    flex-wrap: wrap;
}
.article-pagination a,
.article-pagination span {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 36px; height: 36px;
    padding: 0 0.5rem;
    border-radius: var(--r-sm);
    border: 1px solid var(--c-border);
    color: var(--c-text-light);
    text-decoration: none;
    font-size: 0.88rem;
    transition: all var(--t-fast);
    background: transparent;
}
.article-pagination a:hover {
    border-color: var(--c-primary);
    color: var(--c-primary);
    background: rgba(14,165,233,.06);
}
.article-pagination .current,
.article-pagination span.active {
    background: #e53935;
    border-color: #e53935;
    color: #fff;
    font-weight: 600;
}
.article-pagination .dots {
    border: none; cursor: default; color: var(--c-text-lighter);
}
.article-pagination .disabled {
    opacity: 0.35; pointer-events: none;
}

/* 空状态 */
.empty-state { text-align: center; padding: 4rem 1rem; color: var(--c-text-light); }
.empty-state svg { margin: 0 auto 1rem; display: block; }
.empty-state h3 { margin-bottom: 0.5rem; }
.empty-state p { color: var(--c-text-lighter); }

/* ===== 响应式 ===== */
@media (max-width: 992px) and (min-width: 769px) {
    .articles-grid { grid-template-columns: repeat(2, 1fr); }
    .article-list-grid { grid-template-columns: repeat(3, 1fr); }
}
@media (max-width: 768px) {
    .articles-grid { grid-template-columns: 1fr; }
    .article-list-grid { grid-template-columns: repeat(2, 1fr); gap: 1rem; }
    .article-nav { grid-template-columns: 1fr; }
    .article-nav-item.next { text-align: left; }
    .hero-stats-inline { flex-wrap: wrap; gap: var(--sp-5); }
}

/* ===== 时间轴（紧凑版） ===== */
.timeline-section { position: relative; padding: 2rem 0; }
.timeline {
    position: relative; padding: 1.5rem 0;
    max-width: 900px; margin: 0 auto;
}
.timeline::before {
    content: ''; position: absolute; left: 50%; top: 0; bottom: 0;
    width: 2px;
    background: linear-gradient(180deg, transparent, var(--c-primary), var(--c-primary), transparent);
}
.timeline-item {
    position: relative; width: 50%; padding: 0 2rem 1.8rem 0;
}
.timeline-item.timeline-right { margin-left: 50%; padding: 0 0 1.8rem 2rem; }
.timeline-dot {
    position: absolute; right: -15px; top: 0.3rem;
    width: 28px; height: 28px; border-radius: 50%;
    background: var(--c-dark-2); border: 2px solid var(--c-primary);
    display: flex; align-items: center; justify-content: center;
    z-index: 2; box-shadow: 0 0 16px rgba(14,165,233,.25);
}
.timeline-right .timeline-dot { right: auto; left: -15px; }
.timeline-icon { font-size: 0.85rem; }
.timeline-card {
    background: rgba(30,41,59,.55); border: 1px solid rgba(14,165,233,.15);
    border-radius: var(--r-md);
    padding: 0.8rem 1rem;
    transition: all var(--t-base);
}
.timeline-card:hover {
    border-color: var(--c-primary); box-shadow: 0 0 20px rgba(14,165,233,.12);
    transform: translateY(-1px);
}
.timeline-year { display: flex; align-items: center; gap: 0.4rem; margin-bottom: 0.3rem; }
.year-num {
    font-size: 1.2rem; font-weight: 800; color: var(--c-primary);
    font-family: 'Inter', 'Noto Sans SC', sans-serif; letter-spacing: -0.5px;
}
.quarter {
    font-size: 0.72rem; color: var(--c-accent); font-weight: 600;
    background: rgba(34,211,238,.08); padding: 0.1rem 0.4rem; border-radius: var(--r-sm);
}
.timeline-card h3 { font-size: 0.95rem; color: #e2e8f0; margin-bottom: 0.3rem; }
.timeline-card p { font-size: 0.82rem; color: var(--c-text-light); line-height: 1.6; }
.cases-section { position: relative; }
.cases-grid {
    display: grid; grid-template-columns: repeat(4, 1fr); gap: 1.5rem;
}
.case-card {
    background: rgba(30,41,59,0.6); border: 1px solid rgba(59,130,246,0.15);
    border-radius: var(--r-lg); overflow: hidden;
    transition: all var(--t-base); position: relative;
}
.case-card::before {
    content: ''; position: absolute; inset: 0; border-radius: var(--r-lg);
    background: linear-gradient(135deg, rgba(59,130,246,0.05), transparent 60%);
    pointer-events: none; z-index: 0;
}
.case-card:hover {
    border-color: var(--c-primary); transform: translateY(-6px);
    box-shadow: 0 20px 50px rgba(59,130,246,0.15);
}
.case-icon {
    position: absolute; top: 1rem; right: 1rem; z-index: 2;
    font-size: 2rem; filter: drop-shadow(0 0 8px rgba(59,130,246,0.5));
}
.case-cover {
    height: 180px; overflow: hidden; position: relative;
}
.case-cover img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.6s ease; }
.case-card:hover .case-cover img { transform: scale(1.08); }
.case-cover::after {
    content: ''; position: absolute; inset: 0;
    background: linear-gradient(180deg, transparent 50%, rgba(15,23,42,0.9));
}
.case-body { padding: 1.2rem; position: relative; z-index: 1; }
.case-body h3 { font-size: 1.1rem; color: #fff; margin-bottom: 0.5rem; }
.case-body > p { font-size: 0.85rem; color: var(--c-text-light); line-height: 1.7; margin-bottom: 0.8rem; }
.case-effects { display: flex; flex-wrap: wrap; gap: 0.4rem; margin-bottom: 0.8rem; }
.effect-tag {
    font-size: 0.75rem; color: var(--c-accent); background: rgba(16,185,129,0.1);
    padding: 0.2rem 0.6rem; border-radius: 20px; font-weight: 500;
    border: 1px solid rgba(16,185,129,0.2);
}
.case-materials { font-size: 0.8rem; color: var(--c-text-lighter); }
.materials-label { color: var(--c-text-light); font-weight: 500; margin-right: 0.3rem; }
.material-tag {
    display: inline-block; font-size: 0.75rem; color: var(--c-primary);
    background: rgba(59,130,246,0.1); padding: 0.15rem 0.5rem;
    border-radius: 20px; margin: 0.15rem; border: 1px solid rgba(59,130,246,0.15);
}

/* ===== section-dark 增强（网格背景 + 光效）===== */
.section-dark {
    position: relative; overflow: hidden;
}
.section-dark::before {
    content: ''; position: absolute; inset: 0;
    background-image:
        linear-gradient(rgba(59,130,246,0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(59,130,246,0.03) 1px, transparent 1px);
    background-size: 60px 60px;
    pointer-events: none; z-index: 0;
}
.section-dark::after {
    content: ''; position: absolute; top: -200px; left: 50%; transform: translateX(-50%);
    width: 600px; height: 600px; border-radius: 50%;
    background: radial-gradient(circle, rgba(59,130,246,0.06) 0%, transparent 70%);
    pointer-events: none; z-index: 0;
}
.section-dark > .container { position: relative; z-index: 1; }

/* ===== 数据统计区增强 ===== */
.stats-bar {
    display: grid; grid-template-columns: repeat(4, 1fr); gap: 2rem;
    text-align: center;
}
.stat-item { position: relative; padding: 1.5rem; }
/* 分隔线 */
.stat-item:not(:last-child)::after {
    content: ''; position: absolute; right: 0; top: 20%; height: 60%; width: 1px;
    background: linear-gradient(180deg, transparent, rgba(59,130,246,0.3), transparent);
}
.stat-item .num {
    font-size: 3rem; font-weight: 800; color: #fff;
    font-family: 'Inter', 'Noto Sans SC', sans-serif;
    letter-spacing: -2px; line-height: 1.1;
}
.stat-item .num .unit { font-size: 1.5rem; color: var(--c-primary); }
.stat-item .label { font-size: 0.9rem; color: var(--c-text-light); margin-top: 0.5rem; }

/* ===== 响应式：时间轴 + 案例 ===== */
@media (max-width: 768px) {
    .timeline::before { left: 20px; }
    .timeline-item, .timeline-item.timeline-right {
        width: 100%; margin-left: 0; padding: 0 0 2rem 3rem;
    }
    .timeline-dot { left: 2px !important; right: auto !important; }
    .cases-grid { grid-template-columns: 1fr; }
    .stats-bar { grid-template-columns: repeat(2, 1fr); gap: 1rem; }
    .stat-item:not(:last-child)::after { display: none; }
}
@media (min-width: 769px) and (max-width: 1100px) {
    .cases-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (min-width: 1101px) and (max-width: 1400px) {
    .cases-grid { grid-template-columns: repeat(2, 1fr); gap: 1.5rem; }
}

/* 减少动画偏好 */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after { animation: none !important; transition: none !important; }
    [data-aos] { opacity: 1; transform: none; }
}

/* ===== section-dark 里的卡片适配 ===== */
.section-dark .feature-card {
    background: rgba(30,41,59,0.7); border-color: rgba(59,130,246,0.2);
}
.section-dark .feature-card h3 { color: #fff; }
.section-dark .feature-card p { color: #94a3b8; }
.section-dark .feature-card:hover { background: rgba(30,41,59,0.95); border-color: var(--c-primary); }
.section-dark .feature-card::before { background: linear-gradient(90deg, rgba(59,130,246,0.3), rgba(59,130,246,0.1)); }

.section-dark .article-card {
    background: rgba(30,41,59,0.6); border-color: rgba(59,130,246,0.15);
}
.section-dark .article-card h3 { color: #e2e8f0; }
.section-dark .article-card p { color: #94a3b8; }
.section-dark .article-card:hover { border-color: var(--c-primary); box-shadow: 0 0 30px rgba(59,130,246,0.15); }

/* ===== 时间轴缩小 ===== */
.timeline-card {
    padding: 1rem 1.2rem;
}
.timeline-card h3 { font-size: 0.95rem; margin-bottom: 0.3rem; }
.timeline-card p { font-size: 0.82rem; line-height: 1.6; }
.timeline-year { margin-bottom: 0.3rem; }
.year-num { font-size: 1.4rem; }
.quarter { font-size: 0.75rem; }
.timeline-item { padding: 0 2rem 2rem 0; }
.timeline-item.timeline-right { padding: 0 0 2rem 2rem; }
.timeline-dot { width: 32px; height: 32px; right: -16px; }
.timeline-right .timeline-dot { left: -16px; }
.timeline-icon { font-size: 0.85rem; }

/* ================================================================
   drplc 风格改造 · 四大板块
   ================================================================ */

/* ---- 容器宽版响应式 ---- */
@media (max-width: 1440px) {
    .container-wide { max-width: 1200px; padding: 0 var(--sp-6); }
}
@media (max-width: 1024px) {
    .container-wide { padding: 0 var(--sp-5); }
}

/* ===== 1. 新闻资讯（4列网格卡片 · 暗色统一） ===== */
.section-news {
    background: var(--c-bg-alt);
    color: var(--c-text);
    padding: var(--sp-14) 0;
    position: relative;
}
.section-news .section-head-simple {
    text-align: center;
    margin-bottom: var(--sp-10);
}
.section-head-simple h2 {
    font-size: clamp(1.6rem, 3vw, 2.2rem);
    font-weight: 700;
    color: #fff;
    display: inline-block;
    position: relative;
    margin-bottom: 0;
}
.head-line {
    display: block;
    width: 60px;
    height: 3px;
    background: linear-gradient(90deg, var(--c-primary), var(--c-accent));
    margin: 0.8rem auto 0;
    border-radius: 2px;
}

.news-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--sp-6);
}
.news-card {
    background: var(--c-dark-3);
    border: 1px solid var(--c-border);
    border-radius: var(--r-md);
    overflow: hidden;
    transition: all var(--t-base);
    text-decoration: none;
    color: inherit;
    display: flex;
    flex-direction: column;
}
.news-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 16px 48px rgba(0,0,0,.4);
    border-color: var(--c-primary);
}
.news-card h3 {
    font-size: 1rem;
    font-weight: 600;
    color: #fff;
    line-height: 1.5;
    padding: 1rem 1.2rem 0.5rem;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    min-height: 3.2em;
}
.news-cover {
    position: relative;
    aspect-ratio: 16/9;
    overflow: hidden;
    background: var(--c-dark-2);
}
.news-cover img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--t-slow);
}
.news-card:hover .news-cover img { transform: scale(1.06); }
.news-cover-placeholder {
    width: 100%; height: 100%;
    display: flex; align-items: center; justify-content: center;
    color: var(--c-text-lighter);
    background: linear-gradient(135deg, var(--c-dark-2), var(--c-dark-3));
}
.news-cover-placeholder svg { width: 2.5rem; height: 2.5rem; }
.news-date-badge {
    position: absolute;
    bottom: 12px;
    left: 12px;
    background: rgba(14,165,233,.85);
    backdrop-filter: blur(8px);
    color: #fff;
    border-radius: 4px;
    padding: 4px 10px;
    display: inline-flex;
    flex-direction: column;
    align-items: center;
    line-height: 1.2;
    min-width: 52px;
}
.news-date-badge em {
    font-style: normal;
    font-size: 1rem;
    font-weight: 700;
    display: block;
}
.news-date-badge:last-child { font-size: 0.72rem; opacity: .9; }
.news-summary {
    font-size: 0.85rem;
    color: var(--c-text-light);
    line-height: 1.7;
    padding: 0.8rem 1.2rem 1.2rem;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
    flex: 1;
}
.btn-news-all {
    display: inline-flex;
    align-items: center;
    gap: var(--sp-2);
    padding: 0.85rem 2.8rem;
    background: var(--c-primary);
    color: #fff !important;
    font-size: 1rem;
    font-weight: 600;
    border-radius: var(--r-md);
    transition: all var(--t-base);
    text-decoration: none;
    border: none;
    cursor: pointer;
}
.btn-news-all:hover {
    background: var(--c-primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(14,165,233,.4);
}

@media (max-width: 1100px) {
    .news-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 600px) {
    .news-grid { grid-template-columns: 1fr; }
    .section-news { padding: var(--sp-10) 0; }
}

/* ===== 2. 推荐产品（4列大图卡片 · 暗色统一） ===== */
.section-products-rec {
    background: var(--c-dark);
    padding: var(--sp-14) 0;
}
.section-products-rec .section-head-dot {
    text-align: center;
    margin-bottom: var(--sp-10);
}
.section-head-dot h2 {
    font-size: clamp(1.6rem, 3vw, 2.2rem);
    font-weight: 700;
    color: #fff;
    letter-spacing: 0.05em;
    margin-bottom: 0.3rem;
}
.head-sub {
    font-size: 0.82rem;
    color: var(--c-text-light);
    letter-spacing: 0.25em;
    font-weight: 500;
}

.rec-products-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--sp-6) var(--sp-5);
}
.rec-product-card {
    background: var(--c-dark-3);
    border: 1px solid var(--c-border);
    border-radius: var(--r-md);
    overflow: hidden;
    transition: all var(--t-base);
    text-decoration: none;
    color: inherit;
    display: flex;
    flex-direction: column;
    padding-bottom: var(--sp-5);
}
.rec-product-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 16px 48px rgba(0,0,0,.4);
    border-color: var(--c-primary);
}
.rec-product-img {
    aspect-ratio: 4/3;
    overflow: hidden;
    background: linear-gradient(135deg, var(--c-dark-2), var(--c-dark-3));
    display: flex;
    align-items: center;
    justify-content: center;
}
.rec-product-img img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    padding: var(--sp-4);
    transition: transform var(--t-slow);
}
.rec-product-card:hover .rec-product-img img { transform: scale(1.05); }
.rec-product-img-placeholder svg { width: 4rem; height: 4rem; color: var(--c-text-lighter); }
.rec-product-card > h3 {
    font-size: 1.02rem;
    font-weight: 700;
    color: #fff;
    padding: 1rem 1.2rem 0.4rem;
    line-height: 1.45;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}
.rec-product-desc {
    font-size: 0.83rem;
    color: var(--c-text-light);
    line-height: 1.7;
    padding: 0 1.2rem;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    flex: 1;
    margin-top: 0.3rem;
}
.rec-product-more {
    display: table;
    margin: 0.8rem auto 0;
    padding: 0.45rem 1.5rem;
    border: 1px solid var(--c-border);
    border-radius: var(--r-sm);
    font-size: 0.85rem;
    color: var(--c-text-light);
    transition: all var(--t-fast);
}
.rec-product-card:hover .rec-product-more {
    border-color: var(--c-primary);
    color: var(--c-primary);
}

@media (max-width: 1100px) {
    .rec-products-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 600px) {
    .rec-products-grid { grid-template-columns: 1fr; }
    .section-products-rec { padding: var(--sp-10) 0; }
}

/* ===== 3. 关于我们（深色背景居中文字带 · 暗色统一） ===== */
.section-about-band {
    position: relative;
    padding: var(--sp-14) 0;
    background: linear-gradient(180deg, var(--c-dark) 0%, var(--c-dark-2) 50%, var(--c-dark) 100%);
    color: var(--c-text);
    overflow: hidden;
}
.section-about-band::before {
    content: '';
    position: absolute;
    inset: 0;
    background-image:
        radial-gradient(circle at 15% 40%, rgba(14,165,233,.06) 0%, transparent 45%),
        radial-gradient(circle at 85% 60%, rgba(34,211,238,.04) 0%, transparent 45%);
    pointer-events: none;
}
.about-band-head {
    text-align: center;
    margin-bottom: var(--sp-8);
    position: relative;
    z-index: 1;
}
.about-band-head h2 {
    font-size: clamp(1.6rem, 3.5vw, 2.4rem);
    font-weight: 700;
    color: #fff;
    letter-spacing: 0.08em;
    margin-bottom: 0;
}
.about-line {
    display: block;
    width: 50px;
    height: 2px;
    background: var(--c-primary);
    margin: 1rem auto 0;
    opacity: .7;
}
.about-band-body {
    position: relative;
    z-index: 1;
    text-align: center;
    max-width: 980px;
    margin: 0 auto;
}
.about-band-body p {
    font-size: 1.04rem;
    line-height: 2;
    color: var(--c-text-light);
}
.btn-about-more {
    display: inline-flex;
    align-items: center;
    padding: 0.75rem 2.4rem;
    border: 1.5px solid rgba(14,165,233,.35);
    color: #fff !important;
    font-size: 0.95rem;
    font-weight: 500;
    border-radius: var(--r-sm);
    transition: all var(--t-base);
    text-decoration: none;
    background: transparent;
    cursor: pointer;
}
.btn-about-more:hover {
    border-color: var(--c-primary);
    background: rgba(14,165,233,.08);
    transform: translateY(-2px);
}

@media (max-width: 768px) {
    .section-about-band { padding: var(--sp-10) 0; }
    .about-band-body p { font-size: 0.95rem; line-height: 1.85; }
}

/* ===== 4. 友情链接 ===== */
.friend-links {
    border-top: 1px solid rgba(148,163,184,.08);
    padding: var(--sp-6) 0;
    margin-top: var(--sp-8);
    display: flex;
    align-items: center;
    gap: var(--sp-5);
    flex-wrap: wrap;
}
.friend-links-title {
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--c-text);
    white-space: nowrap;
    letter-spacing: 0.03em;
}
.friend-links-list {
    display: flex;
    align-items: center;
    gap: var(--sp-4);
    flex-wrap: wrap;
    flex: 1;
}
.friend-links-list a {
    font-size: 0.84rem;
    color: var(--c-text-lighter);
    text-decoration: none;
    transition: color var(--t-fast);
    white-space: nowrap;
    padding: 2px 0;
    border-bottom: 1px solid transparent;
}
.friend-links-list a:hover {
    color: var(--c-primary);
    border-bottom-color: var(--c-primary);
}

@media (max-width: 768px) {
    .friend-links { flex-direction: column; align-items: flex-start; gap: var(--sp-3); }
    .friend-links-list a { font-size: 0.78rem; }
}