:root {
    --gold: #c9a95c;
    --gold-dark: #b08a3f;
    --gold-light: #e8d5a0;
    --gold-glow: rgba(201, 169, 92, 0.25);
    --deep: #0f1a0f;
    --deep-light: #1a2e1a;
    --warm: #f8f4ee;
    --card-bg: rgba(255, 255, 255, 0.92);
    --shadow: 0 20px 60px rgba(15, 26, 15, 0.12);
    --shadow-hover: 0 30px 80px rgba(15, 26, 15, 0.18);
    --radius: 28px;
    --radius-sm: 16px;
    --transition: 0.5s cubic-bezier(0.23, 1, 0.32, 1);
    --font-serif: 'Georgia', 'Songti SC', serif;
    --font-sans: 'Inter', 'PingFang SC', 'Microsoft YaHei', sans-serif;
}
* { margin:0; padding:0; box-sizing:border-box; }
html { scroll-behavior:smooth; -webkit-font-smoothing:antialiased; }
body {
    font-family: var(--font-sans);
    color: #1a1a1a;
    background: var(--warm);
    line-height: 1.8;
    overflow-x: hidden;
    padding-top: 80px;
}
a { text-decoration:none; color:inherit; }
img { max-width:100%; display:block; }
::-webkit-scrollbar { width:8px; }
::-webkit-scrollbar-track { background:var(--warm); }
::-webkit-scrollbar-thumb { background:var(--gold); border-radius:10px; }

/* 导航 */
.navbar {
    display:flex; justify-content:space-between; align-items:center;
    padding:1rem 3rem; position:fixed; top:0; left:0; width:100%;
    z-index:1000; background:rgba(255,255,255,0.85);
    backdrop-filter:blur(20px); -webkit-backdrop-filter:blur(20px);
    border-bottom:1px solid rgba(201,169,92,0.12);
    transition:all var(--transition);
}
.navbar.scrolled { background:rgba(255,255,255,0.97); box-shadow:0 4px 40px rgba(0,0,0,0.06); }
.nav-logo { display:flex; align-items:center; }
.logo-img { height:44px; filter:drop-shadow(0 2px 8px rgba(201,169,92,0.2)); }
.nav-links { display:flex; gap:2rem; align-items:center; }
.nav-links a {
    font-weight:500; font-size:0.95rem; color:var(--deep);
    position:relative; padding:0.3rem 0; letter-spacing:0.3px;
    transition:color var(--transition);
}
.nav-links a::after {
    content:''; position:absolute; bottom:-2px; left:0; width:0; height:2px;
    background:var(--gold); transition:width var(--transition);
}
.nav-links a:hover { color:var(--gold-dark); }
.nav-links a:hover::after { width:100%; }
.nav-cta {
    background:linear-gradient(135deg, var(--gold), var(--gold-dark)) !important;
    color:#fff !important; padding:0.6rem 2rem !important;
    border-radius:50px !important; font-weight:600 !important;
    box-shadow:0 8px 24px rgba(201,169,92,0.3);
    transition:all var(--transition) !important;
}
.nav-cta::after { display:none !important; }
.nav-cta:hover { transform:translateY(-2px) !important; box-shadow:0 12px 36px rgba(201,169,92,0.45) !important; }
.hamburger { display:none; background:none; border:none; cursor:pointer; z-index:1001; padding:4px; }
.hamburger span { display:block; width:26px; height:2px; background:var(--deep); margin:5px 0; transition:all 0.3s ease; border-radius:2px; }
.hamburger.active span:nth-child(1) { transform:rotate(45deg) translate(5px,5px); }
.hamburger.active span:nth-child(2) { opacity:0; transform:scaleX(0); }
.hamburger.active span:nth-child(3) { transform:rotate(-45deg) translate(5px,-5px); }

/* Hero */
.hero {
    position:relative; min-height:70vh; display:flex; align-items:center; justify-content:center;
    padding:6rem 2rem; background-size:cover; background-position:center;
    background-color:var(--deep); overflow:hidden; isolation:isolate;
}
.hero::before {
    content:''; position:absolute; inset:0;
    background:radial-gradient(ellipse at 30% 50%, rgba(201,169,92,0.15), transparent 70%),
               radial-gradient(ellipse at 70% 30%, rgba(201,169,92,0.08), transparent 60%),
               linear-gradient(180deg, rgba(15,26,15,0.3) 0%, rgba(15,26,15,0.7) 100%);
    z-index:1;
}
.hero-particles { position:absolute; inset:0; z-index:0; pointer-events:none; overflow:hidden; }
.particle {
    position:absolute; background:radial-gradient(circle, var(--gold-light), transparent 70%);
    border-radius:50%; opacity:0; animation:floatUp 12s infinite ease-in-out;
}
@keyframes floatUp {
    0% { transform:translateY(100vh) scale(0.2); opacity:0; }
    15% { opacity:0.6; }
    80% { opacity:0.2; }
    100% { transform:translateY(-10vh) scale(1.2); opacity:0; }
}
.hero-content {
    position:relative; z-index:2; text-align:center; max-width:860px;
    padding:3.5rem 4rem; background:rgba(255,255,255,0.08);
    backdrop-filter:blur(24px); -webkit-backdrop-filter:blur(24px);
    border-radius:48px; border:1px solid rgba(255,255,255,0.12);
    box-shadow:0 40px 80px rgba(0,0,0,0.3); animation:fadeInUp 1s ease forwards;
}
.hero-content .badge {
    display:inline-block; background:rgba(201,169,92,0.2);
    border:1px solid rgba(201,169,92,0.3); color:var(--gold-light);
    padding:0.3rem 1.5rem; border-radius:50px; font-size:0.8rem;
    letter-spacing:2px; text-transform:uppercase; margin-bottom:1.5rem;
}
.hero h1 { font-family:var(--font-serif); font-size:4.8rem; font-weight:700; line-height:1.15; color:#fff; text-shadow:0 4px 40px rgba(0,0,0,0.2); margin-bottom:1.2rem; }
.hero h1 span { color:var(--gold-light); }
.hero p { font-size:1.3rem; color:rgba(255,255,255,0.85); max-width:600px; margin:0 auto 2.5rem; line-height:1.7; }
.hero .btn-group { display:flex; gap:1.2rem; justify-content:center; flex-wrap:wrap; }
.btn {
    display:inline-block; padding:0.9rem 2.8rem; border-radius:50px;
    font-weight:600; font-size:1.05rem; transition:all var(--transition);
    border:none; cursor:pointer; letter-spacing:0.5px;
}
.btn-primary { background:linear-gradient(135deg, var(--gold), var(--gold-dark)); color:#fff; box-shadow:0 8px 32px rgba(201,169,92,0.35); }
.btn-primary:hover { transform:translateY(-3px); box-shadow:0 16px 48px rgba(201,169,92,0.5); }
.btn-outline-light { background:transparent; color:#fff; border:2px solid rgba(255,255,255,0.4); backdrop-filter:blur(4px); }
.btn-outline-light:hover { background:rgba(255,255,255,0.1); border-color:var(--gold-light); transform:translateY(-3px); }
@keyframes fadeInUp { from { opacity:0; transform:translateY(40px); } to { opacity:1; transform:translateY(0); } }

/* 内页Banner */
.page-banner {
    position:relative; padding:8rem 2rem 5rem; background-size:cover; background-position:center;
    background-color:var(--deep); text-align:center; color:#fff; overflow:hidden; isolation:isolate;
}
.page-banner::before {
    content:''; position:absolute; inset:0;
    background:radial-gradient(ellipse at center, rgba(201,169,92,0.12), rgba(15,26,15,0.7) 80%);
    z-index:1;
}
.page-banner::after {
    content:''; position:absolute; inset:0;
    background:url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23c9a95c' fill-opacity='0.04'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
    z-index:0; opacity:0.5;
}
.page-banner-content { position:relative; z-index:2; max-width:800px; margin:0 auto; }
.page-banner h1 { font-family:var(--font-serif); font-size:3.8rem; font-weight:700; letter-spacing:2px; margin-bottom:0.8rem; text-shadow:0 4px 30px rgba(0,0,0,0.2); }
.page-banner h1 .highlight { color:var(--gold-light); }
.page-banner p { font-size:1.2rem; opacity:0.85; font-weight:300; letter-spacing:1px; }
.page-banner .breadcrumb { margin-top:1.2rem; font-size:0.85rem; opacity:0.6; }
.page-banner .breadcrumb span { color:var(--gold-light); }

/* 通用区块 */
.section { padding:5rem 2rem; max-width:1240px; margin:0 auto; }
.section-title { font-family:var(--font-serif); font-size:3rem; font-weight:700; color:var(--deep); text-align:center; margin-bottom:1rem; }
.section-title .gold { color:var(--gold-dark); }
.section-subtitle { text-align:center; font-size:1.15rem; color:#666; max-width:640px; margin:0 auto 3.5rem; font-weight:300; }
.section-title::after { content:''; display:block; width:80px; height:3px; background:linear-gradient(90deg, var(--gold), var(--gold-dark)); margin:0.8rem auto 0; border-radius:4px; }

/* 卡片 */
.card {
    background:var(--card-bg); backdrop-filter:blur(8px);
    border-radius:var(--radius); box-shadow:var(--shadow);
    padding:2.8rem 3rem; margin-bottom:2rem;
    border:1px solid rgba(201,169,92,0.08);
    transition:all var(--transition);
}
.card:hover { transform:translateY(-8px); box-shadow:var(--shadow-hover); border-color:rgba(201,169,92,0.2); }
.card h3 { font-family:var(--font-serif); font-size:1.6rem; color:var(--deep); margin-bottom:0.8rem; }
.card h4 { font-size:1.2rem; color:var(--deep); margin-bottom:0.5rem; }
.card .gold-line { width:50px; height:2px; background:var(--gold); margin:0.8rem 0 1.2rem; border-radius:2px; }

/* 时间轴 */
.timeline { position:relative; padding-left:4rem; }
.timeline::before { content:''; position:absolute; left:20px; top:0; bottom:0; width:2px; background:linear-gradient(180deg, var(--gold), transparent); }
.timeline-item { position:relative; margin-bottom:3.5rem; opacity:0; transform:translateX(-30px); transition:all 0.8s ease; }
.timeline-item.visible { opacity:1; transform:translateX(0); }
.timeline-marker {
    position:absolute; left:-4rem; top:0.4rem; width:40px; height:40px;
    background:linear-gradient(135deg, var(--gold), var(--gold-dark));
    border-radius:50%; border:4px solid #fff;
    box-shadow:0 0 0 4px var(--gold), 0 8px 24px rgba(201,169,92,0.3);
    display:flex; align-items:center; justify-content:center;
    color:#fff; font-weight:700; font-size:0.9rem;
}
.timeline-item .card { margin:0; }

/* 产业链翻转 */
.chain-grid { display:flex; flex-wrap:wrap; justify-content:center; gap:2rem; }
.chain-node { flex:1 1 170px; max-width:200px; height:230px; perspective:1000px; cursor:pointer; }
.chain-inner { position:relative; width:100%; height:100%; transition:transform 0.7s cubic-bezier(0.23,1,0.32,1); transform-style:preserve-3d; }
.chain-node:hover .chain-inner { transform:rotateY(180deg); }
.chain-node.flipped .chain-inner { transform:rotateY(180deg); }
.chain-front, .chain-back {
    position:absolute; width:100%; height:100%; backface-visibility:hidden;
    border-radius:var(--radius); box-shadow:var(--shadow);
    display:flex; flex-direction:column; align-items:center; justify-content:center;
    padding:1.8rem 1.2rem; background:#fff; text-align:center;
    border:1px solid rgba(201,169,92,0.06);
}
.chain-front:hover { border-color:var(--gold); }
.chain-back { transform:rotateY(180deg); background:linear-gradient(145deg, var(--deep), var(--deep-light)); color:#fff; border-color:var(--gold); }
.chain-icon-img { width:64px; height:64px; object-fit:contain; margin-bottom:1rem; filter:drop-shadow(0 4px 12px rgba(201,169,92,0.15)); }
.chain-front h4 { font-size:1.1rem; font-weight:600; color:var(--deep); }
.chain-front p { font-size:0.85rem; color:#888; margin-top:0.2rem; }
.chain-back p { font-size:0.95rem; line-height:1.6; font-weight:300; }

/* 竞品对比条 */
.compare-bar-wrap { margin:1.5rem 0; }
.compare-label { display:flex; justify-content:space-between; font-weight:500; margin-bottom:0.5rem; font-size:0.95rem; }
.compare-label span:last-child { color:var(--gold-dark); font-weight:600; }
.compare-bar { height:32px; background:#e8e4dc; border-radius:20px; overflow:hidden; position:relative; }
.compare-fill { height:100%; border-radius:20px; transition:width 1.4s cubic-bezier(0.23,1,0.32,1); display:flex; align-items:center; justify-content:flex-end; padding-right:1rem; color:#fff; font-size:0.85rem; font-weight:600; background:linear-gradient(90deg, var(--gold), var(--gold-dark)); width:0; }

/* 预算进度条 */
.budget-item { margin-bottom:2rem; }
.budget-label { display:flex; justify-content:space-between; font-weight:600; margin-bottom:0.4rem; font-size:1rem; }
.budget-bar { height:16px; background:#e8e4dc; border-radius:12px; overflow:hidden; }
.budget-fill { height:100%; width:0; border-radius:12px; background:linear-gradient(90deg, var(--gold-light), var(--gold), var(--gold-dark)); transition:width 1.8s cubic-bezier(0.23,1,0.32,1); }

/* 数字滚动 */
.num-roll { font-weight:700; color:var(--gold-dark); font-size:3.2rem; font-family:var(--font-serif); display:inline-block; }
.stat-grid { display:grid; grid-template-columns:repeat(auto-fit, minmax(200px,1fr)); gap:2rem; text-align:center; }
.stat-item { padding:1.5rem; }
.stat-item .label { font-size:1rem; color:#666; margin-top:0.3rem; }

/* 步骤引导 */
.stepper { display:flex; flex-wrap:wrap; justify-content:center; gap:1.5rem; margin:2.5rem 0; }
.step-item { flex:1 1 200px; max-width:270px; padding:2rem 1.5rem; text-align:center; background:#fff; border-radius:var(--radius-sm); box-shadow:var(--shadow); border-top:4px solid #ddd; transition:all var(--transition); }
.step-item:hover { transform:translateY(-6px); box-shadow:var(--shadow-hover); }
.step-item.active { border-top-color:var(--gold); background:linear-gradient(180deg, #fdf9f2, #fff); }
.step-item.completed { border-top-color:#4a8f4a; }
.step-item .step-num { display:inline-flex; align-items:center; justify-content:center; width:44px; height:44px; border-radius:50%; background:#ddd; color:#fff; font-weight:700; font-size:1.2rem; margin-bottom:0.8rem; transition:all var(--transition); }
.step-item.active .step-num { background:linear-gradient(135deg, var(--gold), var(--gold-dark)); box-shadow:0 8px 24px rgba(201,169,92,0.3); }
.step-item.completed .step-num { background:#4a8f4a; }
.step-item h4 { font-size:1.1rem; margin-bottom:0.3rem; }
.step-item p { font-size:0.9rem; color:#888; }

/* 风险/团队翻转 */
.risk-grid, .team-grid { display:flex; flex-wrap:wrap; gap:2rem; justify-content:center; }
.risk-card, .team-card { flex:1 1 220px; max-width:280px; height:220px; perspective:1000px; cursor:pointer; }
.risk-inner, .team-inner { position:relative; width:100%; height:100%; transition:transform 0.7s cubic-bezier(0.23,1,0.32,1); transform-style:preserve-3d; }
.risk-card:hover .risk-inner, .team-card:hover .team-inner { transform:rotateY(180deg); }
.risk-front, .risk-back, .team-front, .team-back {
    position:absolute; width:100%; height:100%; backface-visibility:hidden;
    border-radius:var(--radius); box-shadow:var(--shadow);
    display:flex; flex-direction:column; align-items:center; justify-content:center;
    padding:2rem; background:#fff; text-align:center;
    border:1px solid rgba(201,169,92,0.06);
}
.risk-back, .team-back { transform:rotateY(180deg); background:linear-gradient(145deg, var(--deep), var(--deep-light)); color:#fff; border-color:var(--gold); }
.risk-front h4, .team-front h4 { font-size:1.3rem; font-weight:600; color:var(--deep); }
.risk-front p, .team-front p { color:#888; font-size:0.95rem; }
.risk-back p, .team-back p { font-size:0.95rem; line-height:1.6; font-weight:300; }

/* 锁定 */
.locked { display:inline-block; background:#f6f3ec; color:var(--gold-dark); padding:0.2rem 1.2rem; border-radius:50px; font-weight:600; font-size:0.85rem; border:1px solid var(--gold-light); letter-spacing:0.3px; }

/* 下一步 */
.next-action { background:linear-gradient(135deg, #f6f3ec, #f0ece4); padding:1.4rem 2rem; border-left:6px solid var(--gold); border-radius:0 var(--radius-sm) var(--radius-sm) 0; margin-top:2rem; font-weight:500; font-size:1.05rem; box-shadow:0 4px 16px rgba(0,0,0,0.03); }
.next-action strong { color:var(--gold-dark); }

/* 返回顶部 */
.back-to-top {
    position:fixed; bottom:30px; right:30px;
    width:52px; height:52px; background:linear-gradient(135deg, var(--gold), var(--gold-dark));
    color:#fff; border-radius:50%; display:flex; align-items:center; justify-content:center;
    font-size:1.6rem; cursor:pointer; opacity:0; transform:translateY(30px);
    transition:all 0.4s ease; z-index:999; border:none;
    box-shadow:0 8px 32px rgba(201,169,92,0.4);
}
.back-to-top.visible { opacity:1; transform:translateY(0); }
.back-to-top:hover { transform:translateY(-4px) scale(1.05); box-shadow:0 12px 40px rgba(201,169,92,0.5); }

/* 滚动渐显 */
.fade-up { opacity:0; transform:translateY(50px); transition:all 0.9s cubic-bezier(0.23,1,0.32,1); }
.fade-up.visible { opacity:1; transform:translateY(0); }

/* 页脚 */
.footer { text-align:center; padding:3.5rem 2rem; background:var(--deep); color:rgba(255,255,255,0.7); border-top:1px solid rgba(201,169,92,0.1); }
.footer .footer-brand { font-family:var(--font-serif); font-size:1.4rem; color:var(--gold-light); margin-bottom:0.5rem; letter-spacing:2px; }
.footer .footer-divider { width:60px; height:1px; background:rgba(201,169,92,0.3); margin:1rem auto; }
.footer p { font-size:0.9rem; font-weight:300; letter-spacing:0.5px; }
.footer a { color:var(--gold-light); transition:color var(--transition); }
.footer a:hover { color:#fff; }

/* 响应式 */
@media (max-width:1024px) {
    .hero h1 { font-size:3.6rem; }
    .page-banner h1 { font-size:3rem; }
    .section-title { font-size:2.6rem; }
}
@media (max-width:768px) {
    body { padding-top:70px; }
    .navbar { padding:0.8rem 1.5rem; }
    .hamburger { display:block; }
    .nav-links {
        display:none; position:absolute; top:70px; left:0; width:100%;
        background:rgba(255,255,255,0.98); backdrop-filter:blur(20px);
        flex-direction:column; padding:1.5rem 0; gap:0.5rem;
        box-shadow:0 20px 40px rgba(0,0,0,0.06);
        border-top:1px solid rgba(201,169,92,0.1);
    }
    .nav-links.active { display:flex; }
    .nav-links a { padding:0.8rem 0; width:100%; text-align:center; font-size:1rem; }
    .nav-cta { margin:0.5rem 1.5rem !important; }
    .hero { min-height:60vh; padding:4rem 1rem; }
    .hero-content { padding:2rem 1.5rem; border-radius:32px; }
    .hero h1 { font-size:2.6rem; }
    .hero p { font-size:1rem; }
    .hero .btn { padding:0.7rem 1.8rem; font-size:0.95rem; }
    .page-banner { padding:5rem 1rem 3rem; }
    .page-banner h1 { font-size:2.4rem; }
    .page-banner p { font-size:1rem; }
    .section { padding:3rem 1rem; }
    .section-title { font-size:2rem; }
    .section-subtitle { font-size:1rem; margin-bottom:2.5rem; }
    .card { padding:1.8rem 1.5rem; }
    .chain-node { flex:1 1 140px; max-width:160px; height:200px; }
    .chain-front h4 { font-size:0.95rem; }
    .chain-icon-img { width:48px; height:48px; }
    .timeline { padding-left:2.8rem; }
    .timeline::before { left:12px; }
    .timeline-marker { left:-2.8rem; width:32px; height:32px; font-size:0.7rem; }
    .risk-card, .team-card { flex:0 0 calc(50% - 1rem); max-width:calc(50% - 1rem); height:190px; }
    .stepper { flex-direction:column; align-items:stretch; }
    .step-item { max-width:100%; }
    .stat-grid { grid-template-columns:1fr 1fr; gap:1rem; }
    .num-roll { font-size:2.4rem; }
    .back-to-top { width:44px; height:44px; font-size:1.2rem; bottom:20px; right:20px; }
}
@media (max-width:480px) {
    .hero h1 { font-size:2rem; }
    .page-banner h1 { font-size:1.8rem; }
    .section-title { font-size:1.6rem; }
    .chain-node { flex:1 1 120px; max-width:140px; height:180px; }
    .risk-card, .team-card { flex:0 0 100%; max-width:100%; height:180px; }
    .stat-grid { grid-template-columns:1fr; }
}