/* ==================== 腾龙广告 - 豆包风格主样式 ==================== */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800;900&display=swap');
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    font-family: 'Inter', 'PingFang SC', 'Microsoft YaHei', sans-serif;
    color: #1a1a2e; background: #fff;
    overflow-x: hidden; -webkit-font-smoothing: antialiased;
}

/* ==================== 滚动进度条 ==================== */
.scroll-progress {
    position: fixed; top: 0; left: 0; height: 2px; z-index: 9999;
    background: linear-gradient(90deg, #4e6ef2, #8b5cf6, #a78bfa);
    transition: width 0.08s linear;
}

/* ==================== 导航栏 ==================== */
.navbar {
    position: fixed; top: 0; left: 0; right: 0;
    height: 56px; display: flex; align-items: center; justify-content: space-between;
    padding: 0 40px;
    background: rgba(255,255,255,0.8);
    backdrop-filter: blur(20px) saturate(1.5);
    -webkit-backdrop-filter: blur(20px) saturate(1.5);
    z-index: 1000; transition: all 0.3s;
}
.navbar.scrolled { background: rgba(255,255,255,0.95); box-shadow: 0 1px 12px rgba(0,0,0,0.06); }
.nav-left { display: flex; align-items: center; gap: 28px; }
.nav-brand { display: flex; align-items: center; gap: 10px; text-decoration: none; font-size: 17px; font-weight: 700; color: #1a1a2e; }
.nav-brand-icon {
    width: 28px; height: 28px; background: linear-gradient(135deg, #4e6ef2, #8b5cf6);
    border-radius: 7px; display: flex; align-items: center; justify-content: center;
    color: #fff; font-size: 13px; font-weight: 800;
}
.nav-links { display: flex; gap: 2px; }
.nav-links a { padding: 6px 14px; border-radius: 8px; font-size: 13.5px; font-weight: 500; color: #555; text-decoration: none; transition: all 0.2s; }
.nav-links a:hover, .nav-links a.active { color: #4e6ef2; background: rgba(78,110,242,0.06); }
.nav-right { display: flex; align-items: center; gap: 10px; }
.btn-login { padding: 7px 16px; border-radius: 8px; font-size: 13px; font-weight: 500; color: #4e6ef2; background: none; border: none; cursor: pointer; display: flex; align-items: center; gap: 4px; }
.btn-login:hover { background: rgba(78,110,242,0.06); }
.btn-start { padding: 7px 18px; border-radius: 8px; font-size: 13px; font-weight: 600; color: #fff; background: #4e6ef2; border: none; cursor: pointer; transition: all 0.2s; box-shadow: 0 2px 8px rgba(78,110,242,0.3); }
.btn-start:hover { background: #3d5bd9; transform: translateY(-1px); box-shadow: 0 4px 14px rgba(78,110,242,0.4); }

/* ==================== Hero ==================== */
.hero {
    position: relative; min-height: 100vh;
    display: flex; align-items: center; justify-content: center;
    background: #0a0a14; overflow: hidden;
}
.hero-blob { position: absolute; border-radius: 50%; filter: blur(80px); pointer-events: none; }
.blob-1 { width: 600px; height: 600px; background: radial-gradient(circle, rgba(78,110,242,0.35) 0%, transparent 70%); top: -10%; left: 20%; animation: blobDrift 20s ease-in-out infinite; }
.blob-2 { width: 500px; height: 500px; background: radial-gradient(circle, rgba(139,92,246,0.25) 0%, transparent 70%); bottom: -10%; right: 10%; animation: blobDrift 25s ease-in-out infinite reverse; }
.blob-3 { width: 350px; height: 350px; background: radial-gradient(circle, rgba(59,130,246,0.2) 0%, transparent 70%); top: 50%; left: 60%; animation: blobDrift 18s ease-in-out infinite 3s; }
@keyframes blobDrift { 0%,100% { transform: translate(0,0) scale(1); } 33% { transform: translate(40px,-30px) scale(1.05); } 66% { transform: translate(-20px,40px) scale(0.95); } }

.hero-dots {
    position: absolute; inset: 0;
    background-image: radial-gradient(circle at 1px 1px, rgba(255,255,255,0.03) 1px, transparent 0);
    background-size: 48px 48px;
    mask-image: radial-gradient(ellipse at center 50%, black 20%, transparent 70%);
    -webkit-mask-image: radial-gradient(ellipse at center 50%, black 20%, transparent 70%);
}
.hero-float { position: absolute; pointer-events: none; border-radius: 50%; }
.hf1 { width: 6px; height: 6px; background: rgba(78,110,242,0.5); top: 25%; left: 15%; animation: floatUp 6s ease-in-out infinite; box-shadow: 0 0 16px rgba(78,110,242,0.3); }
.hf2 { width: 4px; height: 4px; background: rgba(139,92,246,0.6); top: 35%; right: 20%; animation: floatUp 8s ease-in-out infinite 1s; box-shadow: 0 0 12px rgba(139,92,246,0.3); }
.hf3 { width: 5px; height: 5px; background: rgba(59,130,246,0.4); bottom: 30%; left: 30%; animation: floatUp 7s ease-in-out infinite 2s; }
.hf4 { width: 3px; height: 3px; background: rgba(167,139,250,0.5); bottom: 25%; right: 35%; animation: floatUp 9s ease-in-out infinite 0.5s; }
@keyframes floatUp { 0%,100% { transform: translateY(0); opacity: 0.4; } 50% { transform: translateY(-40px); opacity: 0.9; } }

.hero-decor {
    position: absolute; pointer-events: none;
    padding: 10px 16px; background: rgba(255,255,255,0.03);
    border: 1px solid rgba(255,255,255,0.06); border-radius: 12px;
    color: rgba(255,255,255,0.4); font-size: 12px; font-weight: 500;
    backdrop-filter: blur(8px);
}
.decor1 { top: 18%; left: 8%; animation: decorFloat 12s ease-in-out infinite; }
.decor2 { top: 22%; right: 6%; animation: decorFloat 15s ease-in-out infinite 3s; }
.decor3 { bottom: 20%; left: 12%; animation: decorFloat 14s ease-in-out infinite 6s; }
@keyframes decorFloat { 0%,100% { transform: translateY(0) rotate(0deg); } 50% { transform: translateY(-20px) rotate(2deg); } }

/* Hero 浮动卡片 */
.hero-cards { position: absolute; inset: 0; z-index: 5; pointer-events: none; }
.hero-floating-card {
    position: absolute; padding: 14px 20px;
    background: rgba(255,255,255,0.04); border: 1px solid rgba(255,255,255,0.06);
    border-radius: 14px; backdrop-filter: blur(12px);
    color: rgba(255,255,255,0.6); font-size: 13px; font-weight: 500;
    display: flex; align-items: center; gap: 10px;
    transition: all 1.2s cubic-bezier(0.16,1,0.3,1);
    will-change: transform, opacity;
}
.hero-floating-card .fc-icon { font-size: 22px; }
.hero-floating-card .fc-text { font-size: 12px; line-height: 1.4; }
.hero-floating-card .fc-text strong { display: block; font-size: 14px; color: rgba(255,255,255,0.85); }
.hero-cards.scattered .hfc-1 { transform: translate(-120px,-80px) rotate(-8deg) scale(0.7); opacity: 0; }
.hero-cards.scattered .hfc-2 { transform: translate(140px,-60px) rotate(6deg) scale(0.7); opacity: 0; }
.hero-cards.scattered .hfc-3 { transform: translate(-160px,60px) rotate(-5deg) scale(0.6); opacity: 0; }
.hero-cards.scattered .hfc-4 { transform: translate(120px,80px) rotate(10deg) scale(0.6); opacity: 0; }
.hero-cards.scattered .hfc-5 { transform: translate(-80px,120px) rotate(-12deg) scale(0.5); opacity: 0; }
.hero-cards.scattered .hfc-6 { transform: translate(100px,110px) rotate(8deg) scale(0.5); opacity: 0; }
.hero-cards.gathered .hfc-1, .hero-cards.gathered .hfc-2, .hero-cards.gathered .hfc-3,
.hero-cards.gathered .hfc-4, .hero-cards.gathered .hfc-5, .hero-cards.gathered .hfc-6 {
    transform: translate(0,0) rotate(0deg) scale(1); opacity: 1;
}

.hero-inner { position: relative; z-index: 10; text-align: center; max-width: 680px; padding: 0 24px; }
.hero-tag {
    display: inline-flex; align-items: center; gap: 6px;
    padding: 5px 14px; background: rgba(78,110,242,0.08);
    border: 1px solid rgba(78,110,242,0.12); border-radius: 20px;
    font-size: 12px; font-weight: 500; color: rgba(255,255,255,0.6);
    margin-bottom: 28px; animation: fadeUp 0.8s cubic-bezier(0.16,1,0.3,1) 0.1s both;
}
.hero-tag-dot { width: 5px; height: 5px; background: #4e6ef2; border-radius: 50%; box-shadow: 0 0 6px #4e6ef2; }
.hero-title {
    font-size: clamp(42px, 7vw, 68px); font-weight: 900; color: #fff;
    line-height: 1.05; margin-bottom: 20px; letter-spacing: -2px;
    animation: fadeUp 0.8s cubic-bezier(0.16,1,0.3,1) 0.2s both;
}
.hero-title .gradient {
    background: linear-gradient(135deg, #7ba4ff 0%, #a78bfa 50%, #c084fc 100%);
    -webkit-background-clip: text; -webkit-text-fill-color: transparent;
}
.hero-subtitle {
    font-size: 16px; color: rgba(255,255,255,0.45); line-height: 1.7;
    margin-bottom: 36px; animation: fadeUp 0.8s cubic-bezier(0.16,1,0.3,1) 0.3s both;
}
.hero-subtitle strong { color: rgba(255,255,255,0.65); font-weight: 500; }
.hero-subtitle .highlight { color: #a78bfa; font-weight: 500; }
.hero-input-wrap {
    display: flex; align-items: center; max-width: 440px; margin: 0 auto 40px;
    padding: 6px 6px 6px 20px; background: rgba(255,255,255,0.06);
    border: 1px solid rgba(255,255,255,0.08); border-radius: 14px;
    transition: all 0.3s; animation: fadeUp 0.8s cubic-bezier(0.16,1,0.3,1) 0.4s both;
}
.hero-input-wrap:hover { background: rgba(255,255,255,0.08); border-color: rgba(78,110,242,0.3); }
.hero-input-wrap:focus-within { border-color: rgba(78,110,242,0.5); box-shadow: 0 0 0 3px rgba(78,110,242,0.08); }
.hero-input { flex: 1; background: none; border: none; outline: none; font-size: 14px; color: rgba(255,255,255,0.8); font-family: inherit; }
.hero-input::placeholder { color: rgba(255,255,255,0.25); }
.hero-input-btn {
    padding: 10px 22px; border-radius: 10px;
    background: linear-gradient(135deg, #4e6ef2, #6366f1);
    color: #fff; border: none; font-size: 13px; font-weight: 600;
    cursor: pointer; white-space: nowrap; transition: 0.2s;
}
.hero-input-btn:hover { opacity: 0.9; }
.hero-bottom-stats {
    display: flex; align-items: center; justify-content: center; gap: 24px;
    animation: fadeUp 0.8s cubic-bezier(0.16,1,0.3,1) 0.5s both;
}
.hb-num { font-size: 28px; font-weight: 800; color: #fff; letter-spacing: -1px; }
.hb-num .unit { font-size: 16px; font-weight: 600; color: #7ba4ff; }
.hb-label { font-size: 12px; color: rgba(255,255,255,0.3); margin-top: 2px; }
.hb-sep { width: 1px; height: 32px; background: rgba(255,255,255,0.08); }
@keyframes fadeUp { from { opacity: 0; transform: translateY(24px); } to { opacity: 1; transform: translateY(0); } }

/* ==================== 通用区块 ==================== */
.section { padding: 60px 20px; }
.section-dark { background: #0a0a14; color: #fff; }
.section-gray { background: #fafafa; }
.container { max-width: 100%; margin: 0 auto; padding: 0 30px; }
.sec-head { text-align: center; margin-bottom: 56px; }
.sec-head .label { display: inline-block; font-size: 11px; font-weight: 600; letter-spacing: 2px; color: #4e6ef2; margin-bottom: 14px; }
.section-dark .sec-head .label { color: #7ba4ff; }
.sec-head h2 { font-size: 34px; font-weight: 800; color: #1a1a2e; letter-spacing: -1px; margin-bottom: 10px; }
.section-dark .sec-head h2 { color: #fff; }
.sec-head p { font-size: 15px; color: #999; }
.section-dark .sec-head p { color: rgba(255,255,255,0.4); }
.empty-tip { text-align: center; color: #999; padding: 60px 0; font-size: 15px; grid-column: 1 / -1; }

/* ==================== 散开聚合动画 ==================== */
.scatter {
    opacity: 0; transition: all 0.9s cubic-bezier(0.16,1,0.3,1);
    will-change: transform, opacity;
}
.scatter-left { transform: translateX(-80px) scale(0.85) rotate(-3deg); }
.scatter-right { transform: translateX(80px) scale(0.85) rotate(3deg); }
.scatter-up { transform: translateY(-60px) scale(0.85); }
.scatter-down { transform: translateY(60px) scale(0.85); }
.scatter-up-left { transform: translate(-60px,-50px) scale(0.8) rotate(-5deg); }
.scatter-up-right { transform: translate(60px,-50px) scale(0.8) rotate(5deg); }
.scatter-down-left { transform: translate(-60px,50px) scale(0.8) rotate(-4deg); }
.scatter-down-right { transform: translate(60px,50px) scale(0.8) rotate(4deg); }
.scatter-far-left { transform: translateX(-120px) scale(0.7) rotate(-6deg); }
.scatter-far-right { transform: translateX(120px) scale(0.7) rotate(6deg); }
.scatter-zoom-out { transform: scale(0.6); }
.scatter.in-view { opacity: 1; transform: translateX(0) translateY(0) scale(1) rotate(0deg); }
.scatter.out-view { opacity: 0; }
.scatter.out-view[data-dir="left"] { transform: translateX(-80px) scale(0.85) rotate(-3deg); }
.scatter.out-view[data-dir="right"] { transform: translateX(80px) scale(0.85) rotate(3deg); }
.scatter.out-view[data-dir="up"] { transform: translateY(-60px) scale(0.85); }
.scatter.out-view[data-dir="down"] { transform: translateY(60px) scale(0.85); }
.scatter.out-view[data-dir="up-left"] { transform: translate(-60px,-50px) scale(0.8) rotate(-5deg); }
.scatter.out-view[data-dir="up-right"] { transform: translate(60px,-50px) scale(0.8) rotate(5deg); }
.scatter.out-view[data-dir="down-left"] { transform: translate(-60px,50px) scale(0.8) rotate(-4deg); }
.scatter.out-view[data-dir="down-right"] { transform: translate(60px,50px) scale(0.8) rotate(4deg); }
.scatter.out-view[data-dir="far-left"] { transform: translateX(-120px) scale(0.7) rotate(-6deg); }
.scatter.out-view[data-dir="far-right"] { transform: translateX(120px) scale(0.7) rotate(6deg); }
.scatter.out-view[data-dir="zoom-out"] { transform: scale(0.6); }
.sd1 { transition-delay: 0.05s; } .sd2 { transition-delay: 0.12s; } .sd3 { transition-delay: 0.19s; }
.sd4 { transition-delay: 0.26s; } .sd5 { transition-delay: 0.33s; } .sd6 { transition-delay: 0.40s; }

/* ==================== 图片占位符 ==================== */
.thumb-placeholder { width: 100%; height: 100%; }
.tp-c1 { background: linear-gradient(160deg, #dbeafe, #c7d2fe, #ddd6fe); }
.tp-c2 { background: linear-gradient(160deg, #fce7f3, #fbcfe8, #f5d0fe); }
.tp-c3 { background: linear-gradient(160deg, #cffafe, #a5f3fc, #bae6fd); }
.tp-c4 { background: linear-gradient(160deg, #d1fae5, #a7f3d0, #a5f3fc); }
.tp-d1 { background: linear-gradient(160deg, #e0e7ff, #c7d2fe); }
.tp-d2 { background: linear-gradient(160deg, #f3e8ff, #ddd6fe); }

/* ==================== 文化墙 ==================== */
.culture-grid { display: grid; grid-template-columns: repeat(8, 1fr); gap: 16px; }
.culture-card {
    border-radius: 18px; overflow: hidden; background: #fff;
    border: 1px solid rgba(0,0,0,0.05);
    transition: all 0.5s cubic-bezier(0.16,1,0.3,1); cursor: pointer;
}
.culture-card:hover { transform: translateY(-8px); box-shadow: 0 16px 40px rgba(0,0,0,0.07); }
.culture-thumb { height: 140px; position: relative; overflow: hidden; }
.culture-thumb img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.6s cubic-bezier(0.16,1,0.3,1); }
.culture-card:hover .culture-thumb img { transform: scale(1.08); }
.thumb-overlay {
    position: absolute; inset: 0;
    background: linear-gradient(to top, rgba(10,10,24,0.8) 0%, transparent 60%);
    display: flex; align-items: flex-end; justify-content: center; padding-bottom: 16px;
    opacity: 0; transition: opacity 0.3s;
}
.thumb-overlay span { color: #fff; font-size: 13px; font-weight: 500; display: flex; align-items: center; gap: 4px; }
.culture-card:hover .thumb-overlay { opacity: 1; }
.culture-info { padding: 16px 18px; }
.culture-tag { display: inline-block; padding: 3px 10px; background: rgba(78,110,242,0.06); color: #4e6ef2; border-radius: 6px; font-size: 11px; font-weight: 600; margin-bottom: 8px; }
.culture-info h3 { font-size: 14px; font-weight: 600; color: #1a1a2e; margin-bottom: 4px; }
.culture-info p { font-size: 12px; color: #aaa; }

/* ==================== 展板 ==================== */
.display-list { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.display-item { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; align-items: center; }
.display-content { }
.display-number { font-size: 28px; font-weight: 900; background: linear-gradient(135deg, rgba(78,110,242,0.15), rgba(124,92,252,0.1)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; line-height: 1; margin-bottom: 6px; }
.display-badge { display: inline-flex; align-items: center; gap: 4px; padding: 4px 12px; background: rgba(78,110,242,0.08); color: #7ba4ff; border-radius: 6px; font-size: 11px; font-weight: 600; margin-bottom: 6px; }
.display-content h3 { font-size: 16px; font-weight: 700; color: #fff; margin-bottom: 6px; letter-spacing: -0.5px; }
.display-content p { font-size: 12px; color: rgba(255,255,255,0.4); line-height: 1.5; margin-bottom: 10px; }
.display-features { list-style: none; display: flex; flex-direction: column; gap: 4px; margin-bottom: 10px; }
.display-features li { display: flex; align-items: center; gap: 4px; font-size: 11px; color: rgba(255,255,255,0.6); }
.display-features li i { color: #7ba4ff; }
.visual-frame { border-radius: 12px; overflow: hidden; border: 1px solid rgba(255,255,255,0.05); box-shadow: 0 8px 24px rgba(0,0,0,0.15); }
.visual-frame img { width: 100%; display: block; }

/* ==================== 制度 ==================== */
.system-grid { display: grid; grid-template-columns: repeat(6, 1fr); gap: 16px; }
.system-card {
    background: #fff; border-radius: 16px; padding: 28px 22px;
    border: 1px solid rgba(0,0,0,0.05); cursor: pointer;
    transition: all 0.5s cubic-bezier(0.16,1,0.3,1);
    display: flex; flex-direction: column; gap: 4px;
}
.system-card:hover { transform: translateY(-6px); box-shadow: 0 16px 40px rgba(0,0,0,0.06); border-color: rgba(78,110,242,0.1); }
.system-icon {
    width: 48px; height: 48px; background: rgba(78,110,242,0.06); border-radius: 14px;
    display: flex; align-items: center; justify-content: center;
    font-size: 22px; color: #4e6ef2; margin-bottom: 14px;
    transition: all 0.5s cubic-bezier(0.16,1,0.3,1);
}
.system-card:hover .system-icon {
    background: linear-gradient(135deg, #4e6ef2, #8b5cf6); color: #fff;
    transform: scale(1.08); box-shadow: 0 6px 18px rgba(78,110,242,0.3);
}
.system-content h3 { font-size: 16px; font-weight: 600; color: #1a1a2e; margin-bottom: 6px; }
.system-content p { font-size: 13px; color: #999; line-height: 1.5; }
.system-arrow { color: #ddd; font-size: 16px; margin-top: auto; padding-top: 12px; transition: all 0.3s; }
.system-card:hover .system-arrow { color: #4e6ef2; transform: translateX(4px); }

/* ==================== 产品展示 ==================== */
.showcase-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.showcase-card {
    background: #fff; border-radius: 18px; overflow: hidden;
    border: 1px solid rgba(0,0,0,0.05); cursor: pointer;
    transition: all 0.5s cubic-bezier(0.16,1,0.3,1);
}
.showcase-card:hover { transform: translateY(-8px); box-shadow: 0 16px 40px rgba(0,0,0,0.07); }
.showcase-thumb { position: relative; height: 150px; overflow: hidden; }
.showcase-thumb img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.6s cubic-bezier(0.16,1,0.3,1); }
.showcase-card:hover .showcase-thumb img { transform: scale(1.08); }
.vr-badge {
    position: absolute; top: 12px; left: 12px;
    padding: 5px 12px; background: rgba(0,0,0,0.5);
    backdrop-filter: blur(8px); border-radius: 8px;
    color: #fff; font-size: 11px; font-weight: 500;
    display: flex; align-items: center; gap: 4px;
}
.showcase-cat {
    position: absolute; bottom: 12px; right: 12px;
    padding: 4px 10px; background: rgba(255,255,255,0.9);
    border-radius: 6px; font-size: 11px; color: #666; font-weight: 500;
}
.showcase-info { padding: 18px 20px; }
.showcase-info h3 { font-size: 15px; font-weight: 600; color: #1a1a2e; margin-bottom: 6px; }
.showcase-info p { font-size: 12px; color: #999; }

/* ==================== 服务流程 ==================== */
.flow-grid { display: flex; gap: 0; }
.flow-item { flex: 1; text-align: center; padding: 28px 16px; position: relative; }
.flow-item:not(:last-child)::after {
    content: ''; position: absolute; top: 50px; right: 0;
    width: calc(100% - 80px); height: 1px;
    background: linear-gradient(90deg, rgba(78,110,242,0.15), rgba(78,110,242,0.05));
}
.flow-num {
    font-size: 44px; font-weight: 900;
    background: linear-gradient(180deg, rgba(78,110,242,0.15), rgba(78,110,242,0.04));
    -webkit-background-clip: text; -webkit-text-fill-color: transparent; line-height: 1; margin-bottom: 14px;
}
.flow-icon {
    width: 40px; height: 40px; margin: 0 auto 14px;
    background: rgba(78,110,242,0.05); border-radius: 50%;
    display: flex; align-items: center; justify-content: center;
    font-size: 18px; color: #4e6ef2; transition: all 0.4s;
}
.flow-item:hover .flow-icon { background: linear-gradient(135deg, #4e6ef2, #8b5cf6); color: #fff; transform: scale(1.1); box-shadow: 0 4px 14px rgba(78,110,242,0.3); }
.flow-item h3 { font-size: 14px; font-weight: 600; margin-bottom: 6px; color: #1a1a2e; }
.flow-item p { font-size: 12px; color: #999; }

/* ==================== 优势 ==================== */
.advantage-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.adv-card {
    padding: 32px 26px; background: rgba(255,255,255,0.03);
    border: 1px solid rgba(255,255,255,0.06); border-radius: 18px;
    transition: all 0.5s cubic-bezier(0.16,1,0.3,1); cursor: pointer;
}
.adv-card:hover { background: rgba(255,255,255,0.06); border-color: rgba(78,110,242,0.2); transform: translateY(-6px); box-shadow: 0 16px 40px rgba(78,110,242,0.1); }
.adv-icon {
    width: 44px; height: 44px; background: rgba(78,110,242,0.08); border-radius: 12px;
    display: flex; align-items: center; justify-content: center;
    font-size: 20px; color: #7ba4ff; margin-bottom: 18px; transition: all 0.5s;
}
.adv-card:hover .adv-icon { background: linear-gradient(135deg, #4e6ef2, #8b5cf6); color: #fff; box-shadow: 0 6px 16px rgba(78,110,242,0.3); }
.adv-card h3 { font-size: 16px; font-weight: 600; margin-bottom: 8px; }
.adv-card p { font-size: 13px; color: rgba(255,255,255,0.4); line-height: 1.6; }

/* ==================== 客户案例 ==================== */
.client-grid { display: grid; grid-template-columns: repeat(6, 1fr); gap: 16px; }
.client-item {
    text-align: center; padding: 28px 16px; background: #fff;
    border: 1px solid rgba(0,0,0,0.05); border-radius: 16px;
    transition: all 0.4s; cursor: pointer;
}
.client-item:hover { transform: translateY(-6px); box-shadow: 0 12px 30px rgba(0,0,0,0.06); }
.client-icon { width: 48px; height: 48px; margin: 0 auto 12px; background: rgba(78,110,242,0.06); border-radius: 14px; display: flex; align-items: center; justify-content: center; font-size: 22px; color: #4e6ef2; }
.client-name { display: block; font-size: 13px; font-weight: 600; color: #1a1a2e; margin-bottom: 4px; }
.client-desc { display: block; font-size: 11px; color: #aaa; }

/* ==================== FAQ ==================== */
.faq-list { max-width: 720px; margin: 0 auto; display: flex; flex-direction: column; gap: 10px; }
.faq-item {
    background: #fff; border: 1px solid rgba(0,0,0,0.05); border-radius: 14px;
    overflow: hidden; transition: all 0.3s;
}
.faq-item:hover { border-color: rgba(78,110,242,0.1); }
.faq-item.active { border-color: rgba(78,110,242,0.15); box-shadow: 0 4px 16px rgba(78,110,242,0.06); }
.faq-question {
    display: flex; align-items: center; gap: 12px;
    padding: 18px 22px; cursor: pointer; font-size: 14px; font-weight: 500; color: #1a1a2e;
}
.faq-question > i:first-child { color: #4e6ef2; font-size: 18px; flex-shrink: 0; }
.faq-question > span { flex: 1; }
.faq-arrow { color: #ccc; transition: transform 0.3s; font-size: 14px; }
.faq-item.active .faq-arrow { transform: rotate(180deg); color: #4e6ef2; }
.faq-answer { max-height: 0; overflow: hidden; transition: max-height 0.4s cubic-bezier(0.16,1,0.3,1); }
.faq-item.active .faq-answer { max-height: 200px; }
.faq-answer p { padding: 0 22px 18px 52px; font-size: 13px; color: #999; line-height: 1.7; }

/* ==================== 新闻 ==================== */
.news-grid { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 20px; }
.news-card { background: #fff; border-radius: 18px; overflow: hidden; border: 1px solid rgba(0,0,0,0.05); transition: all 0.5s cubic-bezier(0.16,1,0.3,1); cursor: pointer; }
.news-card:hover { transform: translateY(-6px); box-shadow: 0 16px 40px rgba(0,0,0,0.07); }
.news-thumb { position: relative; height: 180px; overflow: hidden; }
.news-ph { width: 100%; height: 100%; }
.news-ph-1 { background: linear-gradient(135deg, #dbeafe, #c7d2fe); }
.news-ph-2 { background: linear-gradient(135deg, #fce7f3, #fbcfe8); }
.news-ph-3 { background: linear-gradient(135deg, #cffafe, #a5f3fc); }
.news-tag { position: absolute; top: 12px; left: 12px; padding: 4px 10px; background: rgba(78,110,242,0.9); color: #fff; border-radius: 6px; font-size: 11px; font-weight: 500; }
.news-info { padding: 18px 20px; }
.news-date { font-size: 12px; color: #aaa; }
.news-info h3 { font-size: 15px; font-weight: 600; color: #1a1a2e; margin: 6px 0 8px; line-height: 1.4; }
.news-info p { font-size: 12px; color: #999; line-height: 1.6; }

/* ==================== 服务保障 ==================== */
.guarantee-grid { display: grid; grid-template-columns: repeat(6, 1fr); gap: 20px; }
.guarantee-item {
    text-align: center; padding: 32px 20px; background: #fff;
    border: 1px solid rgba(0,0,0,0.05); border-radius: 16px;
    transition: all 0.4s;
}
.guarantee-item:hover { transform: translateY(-6px); box-shadow: 0 12px 30px rgba(0,0,0,0.06); }
.guarantee-icon {
    width: 52px; height: 52px; margin: 0 auto 16px;
    background: rgba(78,110,242,0.06); border-radius: 50%;
    display: flex; align-items: center; justify-content: center;
    font-size: 20px; color: #4e6ef2; font-weight: 700;
}
.guarantee-item h3 { font-size: 15px; font-weight: 600; margin-bottom: 6px; }
.guarantee-item p { font-size: 12px; color: #999; }

/* ==================== CTA ==================== */
.cta-section {
    padding: 100px 40px;
    background: linear-gradient(160deg, #0c0c18, #141428);
    text-align: center;
}
.cta-title { font-size: 40px; font-weight: 900; color: #fff; letter-spacing: -1px; margin-bottom: 14px; }
.cta-title .gradient { background: linear-gradient(135deg, #7ba4ff, #a78bfa, #c084fc); -webkit-background-clip: text; -webkit-text-fill-color: transparent; }
.cta-sub { color: rgba(255,255,255,0.4); font-size: 15px; margin-bottom: 32px; }
.cta-buttons { display: flex; gap: 14px; justify-content: center; }
.cta-btn {
    display: inline-flex; align-items: center; gap: 8px;
    padding: 14px 36px; border-radius: 12px;
    background: linear-gradient(135deg, #4e6ef2, #6366f1);
    color: #fff; text-decoration: none; font-size: 15px; font-weight: 600;
    transition: 0.3s; box-shadow: 0 6px 20px rgba(78,110,242,0.3);
}
.cta-btn:hover { transform: translateY(-3px); box-shadow: 0 10px 30px rgba(78,110,242,0.4); }
.cta-btn-ghost { background: rgba(255,255,255,0.06); border: 1px solid rgba(255,255,255,0.12); box-shadow: none; }
.cta-btn-ghost:hover { background: rgba(255,255,255,0.1); box-shadow: none; }

/* ==================== 关于我们 ==================== */
.about-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: start; }
.about-text .label { margin-bottom: 14px; }
.about-text h2 { font-size: 32px; font-weight: 800; margin-bottom: 16px; letter-spacing: -1px; }
.about-text > p { font-size: 15px; color: #666; line-height: 1.8; margin-bottom: 28px; }
.about-stats { display: flex; gap: 36px; }
.about-stat .about-stat-num { font-size: 28px; font-weight: 800; color: #4e6ef2; }
.about-stat .unit { font-size: 16px; color: #7ba4ff; }
.about-stat .about-stat-label { font-size: 12px; color: #999; margin-top: 2px; }
.about-contact { background: #fff; border-radius: 20px; padding: 36px; border: 1px solid rgba(0,0,0,0.05); box-shadow: 0 4px 20px rgba(0,0,0,0.04); }
.about-contact h3 { font-size: 20px; font-weight: 700; margin-bottom: 24px; }
.contact-form { display: flex; flex-direction: column; gap: 14px; }
.contact-form input, .contact-form textarea {
    width: 100%; padding: 12px 16px; border: 1px solid rgba(0,0,0,0.08);
    border-radius: 10px; font-size: 14px; font-family: inherit; outline: none;
    transition: border-color 0.2s;
}
.contact-form input:focus, .contact-form textarea:focus { border-color: #4e6ef2; box-shadow: 0 0 0 3px rgba(78,110,242,0.06); }
.contact-form textarea { resize: vertical; min-height: 100px; }
.submit-btn {
    padding: 12px 28px; background: linear-gradient(135deg, #4e6ef2, #6366f1);
    color: #fff; border: none; border-radius: 10px;
    font-size: 14px; font-weight: 600; cursor: pointer;
    transition: 0.2s; box-shadow: 0 4px 12px rgba(78,110,242,0.3);
}
.submit-btn:hover { transform: translateY(-2px); box-shadow: 0 8px 20px rgba(78,110,242,0.4); }

/* ==================== Footer ==================== */
.footer { padding: 36px 40px; background: #0a0a14; border-top: 1px solid rgba(255,255,255,0.06); }
.footer-content { display: flex; justify-content: space-between; align-items: center; }
.footer-brand { display: flex; align-items: center; gap: 10px; font-size: 17px; font-weight: 700; color: #fff; text-decoration: none; margin-bottom: 6px; }
.footer-left p { font-size: 12px; color: rgba(255,255,255,0.3); }
.footer-right p { font-size: 13px; color: rgba(255,255,255,0.3); }
.footer-bottom { margin-top: 20px; padding-top: 20px; border-top: 1px solid rgba(255,255,255,0.04); text-align: center; }
.footer-bottom p { font-size: 12px; color: rgba(255,255,255,0.2); }

/* ==================== 办公用品（拼多多风格适配豆包） ==================== */
.pdd-shop { display: flex; gap: 20px; position: relative; }
.pdd-sidebar {
    width: 200px; flex-shrink: 0; background: rgba(255,255,255,0.03);
    border: 1px solid rgba(255,255,255,0.06); border-radius: 18px;
    padding: 20px; max-height: 500px; overflow-y: auto;
}
.pdd-sidebar-header { display: flex; align-items: center; gap: 8px; font-size: 14px; font-weight: 600; color: rgba(255,255,255,0.7); margin-bottom: 16px; padding-bottom: 12px; border-bottom: 1px solid rgba(255,255,255,0.06); }
.pdd-sidebar-header i { color: #7ba4ff; }
.pdd-category-loading { text-align: center; padding: 20px; color: rgba(255,255,255,0.3); }
.pdd-main { flex: 1; }
.pdd-search-bar { margin-bottom: 20px; }
.pdd-search-box {
    display: flex; align-items: center;
    padding: 4px 4px 4px 16px; background: rgba(255,255,255,0.04);
    border: 1px solid rgba(255,255,255,0.08); border-radius: 12px;
}
.pdd-search-box i { color: rgba(255,255,255,0.3); margin-right: 10px; }
.pdd-search-box input { flex: 1; background: none; border: none; outline: none; color: rgba(255,255,255,0.8); font-size: 14px; font-family: inherit; }
.pdd-search-box input::placeholder { color: rgba(255,255,255,0.2); }
.pdd-search-box button { padding: 8px 20px; background: #4e6ef2; color: #fff; border: none; border-radius: 8px; font-size: 13px; font-weight: 600; cursor: pointer; }
.pdd-search-tips { margin-top: 10px; font-size: 12px; color: rgba(255,255,255,0.3); display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.search-tag { padding: 3px 10px; background: rgba(255,255,255,0.04); border-radius: 6px; color: rgba(255,255,255,0.5); text-decoration: none; font-size: 11px; transition: 0.2s; }
.search-tag:hover { background: rgba(78,110,242,0.1); color: #7ba4ff; }
.pdd-goods-grid { display: grid; grid-template-columns: repeat(8, 1fr); gap: 10px; min-height: 200px; }
.pdd-goods-loading { grid-column: 1 / -1; text-align: center; padding: 40px; color: rgba(255,255,255,0.3); display: flex; flex-direction: column; align-items: center; gap: 10px; }
.pdd-goods-empty { grid-column: 1 / -1; text-align: center; padding: 40px; color: rgba(255,255,255,0.3); }
.pdd-goods-empty i { font-size: 40px; display: block; margin-bottom: 8px; }

/* 商品卡片（豆包风格） */
.pdd-goods-card {
    background: rgba(255,255,255,0.03); border: 1px solid rgba(255,255,255,0.06);
    border-radius: 10px; overflow: hidden; cursor: pointer;
    transition: all 0.4s cubic-bezier(0.16,1,0.3,1);
}
.pdd-goods-card:hover { transform: translateY(-2px); background: rgba(255,255,255,0.06); border-color: rgba(78,110,242,0.15); box-shadow: 0 8px 20px rgba(78,110,242,0.1); }
.pdd-goods-image { position: relative; height: 90px; overflow: hidden; background: rgba(255,255,255,0.02); }
.pdd-goods-image img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.5s; }
.pdd-goods-card:hover .pdd-goods-image img { transform: scale(1.05); }
.pdd-goods-image-placeholder { width: 100%; height: 100%; display: flex; align-items: center; justify-content: center; font-size: 24px; color: rgba(255,255,255,0.1); background: linear-gradient(135deg, rgba(78,110,242,0.05), rgba(124,92,252,0.03)); }
.pdd-goods-tag { position: absolute; top: 4px; left: 4px; padding: 2px 5px; background: linear-gradient(135deg, #f43f5e, #ec4899); color: #fff; border-radius: 4px; font-size: 9px; font-weight: 600; }
.pdd-goods-info { padding: 8px; }
.pdd-goods-name { font-size: 11px; font-weight: 600; color: rgba(255,255,255,0.85); margin-bottom: 4px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.pdd-goods-price { display: flex; align-items: baseline; gap: 1px; margin-bottom: 4px; }
.pdd-goods-price .pdd-price-symbol { font-size: 10px; color: #f43f5e; font-weight: 700; }
.pdd-goods-price .pdd-price-num { font-size: 14px; color: #f43f5e; font-weight: 800; }
.pdd-goods-price .pdd-price-orig { font-size: 10px; color: rgba(255,255,255,0.25); text-decoration: line-through; margin-left: 4px; }
.pdd-goods-meta { display: flex; align-items: center; justify-content: space-between; }
.pdd-goods-sales { font-size: 10px; color: rgba(255,255,255,0.3); display: flex; align-items: center; gap: 2px; }
.pdd-goods-sales i { font-size: 10px; color: #f97316; }
.pdd-quick-add {
    padding: 3px 0; width: 100%; background: rgba(78,110,242,0.12); border: 1px solid rgba(78,110,242,0.2);
    border-radius: 5px; color: #7ba4ff; font-size: 10px; cursor: pointer;
    display: flex; align-items: center; justify-content: center; gap: 2px; transition: 0.2s; margin-top: 4px;
}
.pdd-quick-add:hover { background: #4e6ef2; color: #fff; border-color: #4e6ef2; }

/* 分类侧栏 */
.pdd-category-item {
    display: flex; align-items: center; gap: 10px;
    padding: 10px 12px; border-radius: 10px; cursor: pointer;
    font-size: 13px; color: rgba(255,255,255,0.5);
    transition: all 0.2s; margin-bottom: 4px;
}
.pdd-category-item:hover { background: rgba(255,255,255,0.04); color: rgba(255,255,255,0.8); }
.pdd-category-item.active { background: rgba(78,110,242,0.1); color: #7ba4ff; }
.pdd-category-left { width: 28px; height: 28px; background: rgba(255,255,255,0.04); border-radius: 8px; display: flex; align-items: center; justify-content: center; font-size: 14px; }
.pdd-category-item.active .pdd-category-left { background: rgba(78,110,242,0.15); }
.pdd-category-name { flex: 1; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; font-size: 13px; }
.pdd-category-count { font-size: 11px; color: rgba(255,255,255,0.25); }
.pdd-category-item.active .pdd-category-count { color: rgba(78,110,242,0.5); }

/* 购物车面板商品项 */
.pdd-cart-item { display: flex; gap: 12px; padding: 12px 0; border-bottom: 1px solid #f5f5f5; }
.pdd-cart-item-image { width: 50px; height: 50px; background: #f5f5f5; border-radius: 8px; display: flex; align-items: center; justify-content: center; font-size: 18px; color: #ddd; flex-shrink: 0; }
.pdd-cart-item-image img { width: 100%; height: 100%; object-fit: cover; border-radius: 8px; }
.pdd-cart-item-info { flex: 1; min-width: 0; }
.pdd-cart-item-name { font-size: 13px; font-weight: 500; color: #333; margin-bottom: 3px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.pdd-cart-item-spec { font-size: 11px; color: #999; margin-bottom: 6px; }
.pdd-cart-item-bottom { display: flex; align-items: center; justify-content: space-between; }
.pdd-cart-item-price { font-size: 14px; font-weight: 700; color: #f43f5e; }
.pdd-cart-item-qty { display: flex; align-items: center; gap: 0; border: 1px solid #e5e5e5; border-radius: 6px; overflow: hidden; }
.pdd-cart-item-qty button { width: 28px; height: 28px; background: #f9f9f9; border: none; font-size: 14px; cursor: pointer; display: flex; align-items: center; justify-content: center; }
.pdd-cart-item-qty button:hover { background: #eee; }
.pdd-cart-item-qty span { width: 32px; text-align: center; font-size: 13px; border-left: 1px solid #e5e5e5; border-right: 1px solid #e5e5e5; line-height: 28px; }
.pdd-cart-item-remove { cursor: pointer; color: #ccc; font-size: 16px; margin-left: 8px; transition: 0.2s; }
.pdd-cart-item-remove:hover { color: #f43f5e; }

/* 弹窗适配 */
.pdd-goods-modal.show { display: flex !important; }
.pdd-option-btn.selected { border-color: #4e6ef2; color: #4e6ef2; background: rgba(78,110,242,0.04); }
.pdd-cart-panel-backdrop { position: fixed; inset: 0; z-index: 9999; background: rgba(0,0,0,0.3); }
.pdd-cart-panel-backdrop.show { opacity: 1; }

.pdd-pagination { display: flex; align-items: center; justify-content: center; gap: 12px; margin-top: 24px; flex-wrap: wrap; }
.pdd-page-btn { padding: 8px 16px; background: rgba(255,255,255,0.04); border: 1px solid rgba(255,255,255,0.08); border-radius: 8px; color: rgba(255,255,255,0.6); font-size: 13px; cursor: pointer; transition: 0.2s; display: flex; align-items: center; gap: 4px; }
.pdd-page-btn:hover:not(:disabled) { background: rgba(78,110,242,0.1); color: #7ba4ff; border-color: rgba(78,110,242,0.2); }
.pdd-page-btn:disabled { opacity: 0.3; cursor: not-allowed; }
.pdd-page-nums { display: flex; gap: 4px; }
.pdd-page-num { width: 32px; height: 32px; display: flex; align-items: center; justify-content: center; border-radius: 6px; font-size: 13px; color: rgba(255,255,255,0.6); cursor: pointer; background: rgba(255,255,255,0.04); border: 1px solid rgba(255,255,255,0.06); }
.pdd-page-num.active, .pdd-page-num:hover { background: #4e6ef2; color: #fff; border-color: #4e6ef2; }
.pdd-page-info { font-size: 12px; color: rgba(255,255,255,0.3); margin-left: 8px; }
.pdd-cart-float {
    position: fixed; bottom: 30px; right: 30px; z-index: 999;
    display: flex; align-items: center; gap: 10px;
    padding: 12px 18px; background: linear-gradient(135deg, #4e6ef2, #6366f1);
    border-radius: 14px; color: #fff; cursor: pointer;
    box-shadow: 0 8px 24px rgba(78,110,242,0.4);
    transition: 0.3s;
}
.pdd-cart-float:hover { transform: translateY(-3px); box-shadow: 0 12px 32px rgba(78,110,242,0.5); }
.pdd-cart-icon { position: relative; font-size: 20px; }
.pdd-cart-badge { position: absolute; top: -6px; right: -8px; min-width: 16px; height: 16px; background: #f43f5e; border-radius: 8px; font-size: 10px; font-weight: 700; display: flex; align-items: center; justify-content: center; padding: 0 4px; }
.pdd-cart-info { display: flex; flex-direction: column; }
.pdd-cart-count { font-size: 11px; opacity: 0.7; }
.pdd-cart-total { font-size: 14px; font-weight: 700; }

/* 购物车面板 */
.pdd-cart-panel {
    position: fixed; top: 0; right: -420px; width: 400px; height: 100vh; z-index: 10000;
    background: #fff; box-shadow: -4px 0 24px rgba(0,0,0,0.1);
    transition: right 0.4s cubic-bezier(0.16,1,0.3,1);
    display: flex; flex-direction: column;
}
.pdd-cart-panel.open { right: 0; }
.pdd-cart-header { display: flex; justify-content: space-between; align-items: center; padding: 20px 24px; border-bottom: 1px solid #f0f0f0; }
.pdd-cart-header h4 { font-size: 16px; font-weight: 700; display: flex; align-items: center; gap: 8px; }
.pdd-cart-header h4 i { color: #4e6ef2; }
.pdd-cart-close { background: none; border: none; font-size: 18px; color: #999; cursor: pointer; padding: 4px; }
.pdd-cart-items { flex: 1; overflow-y: auto; padding: 16px; }
.pdd-cart-empty { text-align: center; padding: 60px 0; color: #ccc; }
.pdd-cart-empty i { font-size: 40px; display: block; margin-bottom: 6px; }
.pdd-cart-footer { padding: 16px 24px; border-top: 1px solid #f0f0f0; display: flex; justify-content: space-between; align-items: center; }
.pdd-cart-summary { font-size: 13px; color: #999; }
.pdd-cart-summary strong { color: #1a1a2e; }
.pdd-cart-clear { padding: 6px 16px; background: none; border: 1px solid #eee; border-radius: 8px; font-size: 12px; color: #999; cursor: pointer; }

/* 订单表单 */
.office-order-form {
    max-width: 680px; margin: 36px auto 0;
    background: rgba(255,255,255,0.03); border: 1px solid rgba(255,255,255,0.06);
    border-radius: 20px; padding: 36px;
}
.office-order-form h4 { font-size: 20px; font-weight: 700; margin-bottom: 24px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.form-group { margin-bottom: 14px; }
.form-group label { display: block; font-size: 13px; font-weight: 500; color: rgba(255,255,255,0.5); margin-bottom: 6px; }
.form-group label i { margin-right: 4px; }
.form-group input, .form-group textarea {
    width: 100%; padding: 11px 16px; background: rgba(255,255,255,0.04);
    border: 1px solid rgba(255,255,255,0.08); border-radius: 10px;
    color: rgba(255,255,255,0.8); font-size: 14px; font-family: inherit; outline: none; transition: 0.2s;
}
.form-group input:focus, .form-group textarea:focus { border-color: rgba(78,110,242,0.4); }
.form-group input::placeholder { color: rgba(255,255,255,0.2); }
.notify-options { display: flex; gap: 16px; flex-wrap: wrap; margin-top: 8px; }
.notify-option { display: flex; align-items: center; gap: 6px; font-size: 13px; color: rgba(255,255,255,0.5); cursor: pointer; }
.notify-option input { accent-color: #4e6ef2; }
.notify-extra { display: flex; flex-direction: column; gap: 8px; margin-top: 10px; }
.notify-extra input { width: 100% !important; }
.order-submit-btn {
    width: 100%; padding: 14px; background: linear-gradient(135deg, #4e6ef2, #6366f1);
    color: #fff; border: none; border-radius: 12px; font-size: 15px; font-weight: 600;
    cursor: pointer; transition: 0.3s; box-shadow: 0 4px 16px rgba(78,110,242,0.3);
}
.order-submit-btn:hover { transform: translateY(-2px); box-shadow: 0 8px 24px rgba(78,110,242,0.4); }

/* 商品弹窗 */
.pdd-goods-modal { position: fixed; inset: 0; z-index: 10001; display: none; }
.pdd-goods-modal.active { display: flex; align-items: center; justify-content: center; }
.pdd-modal-backdrop { position: absolute; inset: 0; background: rgba(0,0,0,0.5); }
.pdd-modal-content { position: relative; background: #fff; border-radius: 20px; max-width: 560px; width: 90%; max-height: 85vh; overflow-y: auto; box-shadow: 0 20px 60px rgba(0,0,0,0.2); }
.pdd-modal-header { display: flex; justify-content: space-between; align-items: center; padding: 20px 24px; border-bottom: 1px solid #f0f0f0; }
.pdd-modal-header h3 { font-size: 17px; font-weight: 700; }
.pdd-modal-close { background: none; border: none; font-size: 18px; color: #999; cursor: pointer; }
.pdd-modal-body { padding: 24px; }
.pdd-modal-product { display: flex; gap: 20px; margin-bottom: 20px; }
.pdd-modal-image { width: 140px; height: 140px; border-radius: 14px; background: #f5f5f5; overflow: hidden; flex-shrink: 0; }
.pdd-modal-image img { width: 100%; height: 100%; object-fit: cover; }
.pdd-modal-price { font-size: 28px; font-weight: 800; color: #f43f5e; margin-bottom: 6px; }
.pdd-price-symbol { font-size: 16px; }
.pdd-modal-unit { font-size: 12px; color: #999; margin-bottom: 8px; }
.pdd-modal-desc { font-size: 13px; color: #666; margin-bottom: 6px; }
.pdd-modal-sales { font-size: 12px; color: #aaa; }
.pdd-modal-options { margin-bottom: 20px; }
.pdd-option-group { margin-bottom: 14px; }
.pdd-option-label { font-size: 13px; font-weight: 600; margin-bottom: 8px; }
.pdd-option-btns { display: flex; flex-wrap: wrap; gap: 8px; }
.pdd-option-btn { padding: 6px 14px; border: 1px solid #e5e5e5; border-radius: 8px; font-size: 13px; cursor: pointer; transition: 0.2s; background: #fff; }
.pdd-option-btn.active, .pdd-option-btn:hover { border-color: #4e6ef2; color: #4e6ef2; background: rgba(78,110,242,0.04); }
.pdd-modal-quantity { display: flex; align-items: center; gap: 14px; }
.pdd-quantity-label { font-size: 13px; font-weight: 600; }
.pdd-quantity-control { display: flex; align-items: center; gap: 0; border: 1px solid #e5e5e5; border-radius: 8px; overflow: hidden; }
.pdd-qty-btn { width: 36px; height: 36px; background: #f9f9f9; border: none; font-size: 16px; cursor: pointer; }
.pdd-qty-btn:hover { background: #f0f0f0; }
.pdd-quantity-control input { width: 48px; text-align: center; border: none; border-left: 1px solid #e5e5e5; border-right: 1px solid #e5e5e5; font-size: 14px; outline: none; }
.pdd-quantity-unit { font-size: 12px; color: #999; }
.pdd-modal-footer { padding: 16px 24px; border-top: 1px solid #f0f0f0; }
.pdd-btn-add-cart { width: 100%; padding: 14px; background: linear-gradient(135deg, #4e6ef2, #6366f1); color: #fff; border: none; border-radius: 12px; font-size: 15px; font-weight: 600; cursor: pointer; display: flex; align-items: center; justify-content: center; gap: 8px; }

/* ==================== 图片查看器 ==================== */
.image-viewer { position: fixed; inset: 0; z-index: 10002; display: none; }
.image-viewer.active { display: flex; align-items: center; justify-content: center; }
.viewer-backdrop { position: absolute; inset: 0; background: rgba(0,0,0,0.85); }
.viewer-container { position: relative; max-width: 90vw; max-height: 90vh; }
.viewer-content { position: relative; }
.viewer-content img { max-width: 100%; max-height: 80vh; border-radius: 8px; }
.viewer-close, .viewer-nav { position: absolute; background: rgba(255,255,255,0.1); border: none; color: #fff; width: 40px; height: 40px; border-radius: 50%; cursor: pointer; font-size: 18px; display: flex; align-items: center; justify-content: center; transition: 0.2s; backdrop-filter: blur(8px); }
.viewer-close:hover, .viewer-nav:hover { background: rgba(255,255,255,0.2); }
.viewer-close { top: -50px; right: 0; }
.viewer-prev { left: -60px; top: 50%; transform: translateY(-50%); }
.viewer-next { right: -60px; top: 50%; transform: translateY(-50%); }
.viewer-info { text-align: center; margin-top: 16px; color: rgba(255,255,255,0.7); font-size: 14px; }
.viewer-loading { position: absolute; inset: 0; display: flex; align-items: center; justify-content: center; }

/* ==================== VR查看器 ==================== */
.vr-viewer { position: fixed; inset: 0; z-index: 10003; display: none; background: #000; }
.vr-viewer.active { display: flex; align-items: center; justify-content: center; }
.vr-backdrop { position: absolute; inset: 0; }
.vr-container { position: relative; width: 100%; height: 100%; }
.vr-container canvas { width: 100%; height: 100%; }
.vr-close { position: absolute; top: 16px; right: 16px; z-index: 100; background: rgba(255,255,255,0.1); border: none; color: #fff; width: 40px; height: 40px; border-radius: 50%; cursor: pointer; font-size: 18px; backdrop-filter: blur(8px); display: flex; align-items: center; justify-content: center; transition: 0.2s; }
.vr-close:hover { background: rgba(255,60,60,0.8); transform: scale(1.1); }
.vr-nav { position: absolute; top: 50%; z-index: 100; background: rgba(255,255,255,0.1); border: none; color: #fff; width: 44px; height: 44px; border-radius: 50%; cursor: pointer; font-size: 20px; backdrop-filter: blur(8px); display: flex; align-items: center; justify-content: center; transition: 0.2s; }
.vr-nav:hover { background: rgba(255,255,255,0.25); }
.vr-prev { left: 16px; transform: translateY(-50%); }
.vr-next { right: 16px; transform: translateY(-50%); }
.vr-controls { position: absolute; bottom: 60px; left: 50%; transform: translateX(-50%); z-index: 100; display: flex; gap: 8px; }
.vr-hint { position: absolute; bottom: 16px; left: 50%; transform: translateX(-50%); z-index: 100; color: rgba(255,255,255,0.5); font-size: 12px; }
.vr-nav-thumbs { position: absolute; bottom: 110px; left: 0; right: 0; z-index: 100; display: flex; gap: 8px; overflow-x: auto; padding: 8px 16px; }
.vr-loading { position: absolute; top: 50%; left: 50%; transform: translate(-50%, -50%); z-index: 200; color: #fff; text-align: center; }
.vr-loading.hidden { display: none; }
.vr-thumb { width: 60px; height: 60px; border-radius: 8px; overflow: hidden; cursor: pointer; border: 2px solid transparent; flex-shrink: 0; transition: 0.2s; opacity: 0.6; }
.vr-thumb:hover, .vr-thumb.active { border-color: #4e6ef2; opacity: 1; }
.vr-thumb img { width: 100%; height: 100%; object-fit: cover; }
.vr-nav { position: absolute; top: 50%; transform: translateY(-50%); z-index: 10; background: rgba(255,255,255,0.1); border: none; color: #fff; width: 40px; height: 40px; border-radius: 50%; cursor: pointer; font-size: 18px; backdrop-filter: blur(8px); }
.vr-prev { left: 16px; }
.vr-next { right: 16px; }
.vr-loading { position: absolute; inset: 0; display: flex; flex-direction: column; align-items: center; justify-content: center; color: rgba(255,255,255,0.5); gap: 12px; z-index: 5; }
.vr-controls { position: absolute; bottom: 20px; right: 20px; display: flex; gap: 8px; z-index: 10; }
.vr-btn { background: rgba(255,255,255,0.1); border: none; color: #fff; width: 40px; height: 40px; border-radius: 50%; cursor: pointer; font-size: 18px; backdrop-filter: blur(8px); }
.vr-hint { position: absolute; bottom: 20px; left: 50%; transform: translateX(-50%); display: flex; gap: 20px; font-size: 12px; color: rgba(255,255,255,0.4); z-index: 10; }
.vr-hint span { display: flex; align-items: center; gap: 4px; }
.vr-nav-thumbs { position: absolute; bottom: 60px; left: 50%; transform: translateX(-50%); display: flex; gap: 8px; z-index: 10; }
.vr-nav-thumb { width: 60px; height: 40px; border-radius: 6px; overflow: hidden; cursor: pointer; border: 2px solid transparent; opacity: 0.5; transition: 0.3s; }
.vr-nav-thumb.active, .vr-nav-thumb:hover { border-color: #4e6ef2; opacity: 1; }
.vr-nav-thumb img { width: 100%; height: 100%; object-fit: cover; }

/* ==================== 回到顶部 ==================== */
.back-to-top {
    position: fixed; bottom: 30px; right: 30px; z-index: 998;
    width: 44px; height: 44px; border-radius: 12px;
    background: rgba(255,255,255,0.9); border: 1px solid rgba(0,0,0,0.06);
    box-shadow: 0 4px 12px rgba(0,0,0,0.06); color: #666;
    cursor: pointer; font-size: 18px; display: none;
    align-items: center; justify-content: center;
    transition: 0.3s; backdrop-filter: blur(10px);
}
.back-to-top.visible { display: flex; }
.back-to-top:hover { transform: translateY(-3px); box-shadow: 0 8px 20px rgba(0,0,0,0.1); color: #4e6ef2; }

/* ==================== 图片悬浮预览 ==================== */
.image-preview { position: fixed; z-index: 999; pointer-events: none; display: none; background: #fff; border-radius: 12px; overflow: hidden; box-shadow: 0 12px 40px rgba(0,0,0,0.15); border: 1px solid rgba(0,0,0,0.05); }
.image-preview img { display: block; max-width: 280px; max-height: 200px; object-fit: cover; }
.preview-title { padding: 8px 12px; font-size: 12px; color: #666; background: #fff; }

/* ==================== Loading ==================== */
.loading-spinner { width: 28px; height: 28px; border: 3px solid rgba(78,110,242,0.15); border-top-color: #4e6ef2; border-radius: 50%; animation: spin 0.8s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }

/* ==================== 响应式 ==================== */
@media (max-width: 768px) {
    .nav-links { display: none; }
    .culture-grid, .showcase-grid, .news-grid { grid-template-columns: 1fr; }
    .system-grid { grid-template-columns: 1fr 1fr; }
    .advantage-grid { grid-template-columns: 1fr; }
    .client-grid { grid-template-columns: 1fr 1fr; }
    .guarantee-grid { grid-template-columns: 1fr 1fr; }
    .about-grid { grid-template-columns: 1fr; }
    .display-item { grid-template-columns: 1fr; }
    .pdd-shop { flex-direction: column; }
    .pdd-sidebar { width: 100%; max-height: 200px; }
    .pdd-goods-grid { grid-template-columns: 1fr 1fr; }
    .form-row { grid-template-columns: 1fr; }
    .section { padding: 60px 20px; }
}