/* ===== 变量 ===== */
:root {
    --bg: #ffffff;
    --bg-blue: #f0f5ff;
    --bg-blue-dark: #e8f0fe;
    --text: #1a1a2e;
    --text-secondary: #5a5a6e;
    --text-muted: #8a8a9a;
    --purple: #7c3aed;
    --purple-light: #a78bfa;
    --blue: #2563eb;
    --blue-light: #60a5fa;
    --border: #e8ecf4;
    --shadow: 0 4px 24px rgba(0,0,0,0.06);
    --shadow-lg: 0 8px 40px rgba(0,0,0,0.08);
    --radius: 16px;
    --radius-sm: 10px;
    --transition: all 0.3s ease;
}

*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    background: var(--bg); color: var(--text); line-height: 1.6; -webkit-font-smoothing: antialiased;
}
.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
a { text-decoration: none; color: inherit; }
ul { list-style: none; }

/* ===== 按钮 ===== */
.btn {
    display: inline-flex; align-items: center; justify-content: center; gap: 6px;
    padding: 10px 24px; border-radius: var(--radius-sm); font-size: 14px;
    font-weight: 500; cursor: pointer; transition: var(--transition); border: none;
}
.btn-primary { background: linear-gradient(135deg, #7c3aed, #5b21b6); color: #fff; }
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 24px rgba(124,58,237,0.3); }
.btn-white { background: #fff; color: var(--purple); font-weight: 600; }
.btn-white:hover { transform: translateY(-2px); box-shadow: 0 4px 16px rgba(0,0,0,0.1); }
.btn-ghost { background: transparent; color: #fff; border: 1px solid rgba(255,255,255,0.4); }
.btn-ghost:hover { background: rgba(255,255,255,0.1); }
.btn-large { padding: 14px 32px; font-size: 16px; }
.btn .tag { background: var(--blue); color: #fff; font-size: 11px; padding: 2px 8px; border-radius: 4px; margin-left: 6px; }
.btn .arrow { margin-left: 4px; transition: var(--transition); }
.btn:hover .arrow { transform: translateX(4px); }

/* ===== 导航栏 ===== */
.navbar { position: fixed; top: 0; left: 0; right: 0; z-index: 1000; background: #ffffff; border-bottom: 1px solid var(--border); }
.nav-container { max-width: 1200px; margin: 0 auto; padding: 0 24px; display: flex; align-items: center; justify-content: space-between; height: 64px; }
.logo { display: flex; align-items: center; gap: 10px; }
.logo-icon { width: 36px; height: 36px; border-radius: 10px; background: linear-gradient(135deg, #7c3aed, #2563eb); color: #fff; font-size: 18px; font-weight: 700; display: flex; align-items: center; justify-content: center; }
.logo-text { font-size: 18px; font-weight: 600; }
.nav-links { display: flex; gap: 32px; }
.nav-link { font-size: 14px; color: var(--text-secondary); font-weight: 500; transition: var(--transition); position: relative; padding: 4px 0; }
.nav-link::after { content: ''; position: absolute; bottom: 0; left: 0; width: 0; height: 2px; background: linear-gradient(135deg, #7c3aed, #2563eb); border-radius: 2px; transition: var(--transition); }
.nav-link:hover, .nav-link.active { color: var(--purple); }
.nav-link:hover::after, .nav-link.active::after { width: 100%; }
.nav-actions { display: flex; align-items: center; gap: 16px; }
.mobile-toggle { display: none; flex-direction: column; gap: 5px; background: none; border: none; cursor: pointer; padding: 4px; }
.mobile-toggle span { display: block; width: 24px; height: 2px; background: var(--text); border-radius: 2px; }

/* ===== Hero ===== */
.hero { position: relative; min-height: 100vh; display: flex; align-items: center; justify-content: center; padding: 120px 24px 80px; overflow: hidden; background: linear-gradient(135deg, #ede9fe 0%, #dbeafe 30%, #f0f9ff 60%, #ffffff 100%); }
.hero-3d-bg { position: absolute; inset: 0; pointer-events: none; }

/* 3D立方体 */
.cube { position: absolute; transform-style: preserve-3d; animation: float 6s ease-in-out infinite; }
.c1 { width: 60px; height: 60px; top: 15%; left: 8%; background: linear-gradient(135deg, rgba(124,58,237,0.2), rgba(37,99,235,0.15)); border-radius: 12px; border: 1px solid rgba(124,58,237,0.15); animation-delay: 0s; }
.c2 { width: 40px; height: 40px; top: 25%; right: 12%; background: linear-gradient(135deg, rgba(37,99,235,0.2), rgba(6,182,212,0.15)); border-radius: 8px; border: 1px solid rgba(37,99,235,0.15); animation-delay: 1s; }
.c3 { width: 80px; height: 80px; bottom: 20%; left: 15%; background: linear-gradient(135deg, rgba(139,92,246,0.15), rgba(59,130,246,0.1)); border-radius: 16px; border: 1px solid rgba(139,92,246,0.12); animation-delay: 2s; }
.c4 { width: 35px; height: 35px; top: 60%; right: 8%; background: linear-gradient(135deg, rgba(6,182,212,0.2), rgba(37,99,235,0.1)); border-radius: 8px; border: 1px solid rgba(6,182,212,0.15); animation-delay: 0.5s; }
.c5 { width: 50px; height: 50px; bottom: 30%; right: 20%; background: linear-gradient(135deg, rgba(124,58,237,0.12), rgba(139,92,246,0.08)); border-radius: 10px; border: 1px solid rgba(124,58,237,0.1); animation-delay: 1.5s; }

/* 卡片堆叠 */
.card-stack { position: absolute; top: 20%; right: 18%; width: 140px; height: 180px; }
.stack-card { position: absolute; width: 120px; height: 150px; border-radius: 16px; border: 1px solid rgba(124,58,237,0.15); }
.sc1 { background: linear-gradient(135deg, rgba(124,58,237,0.18), rgba(37,99,235,0.1)); top: 0; left: 0; transform: rotate(-8deg); }
.sc2 { background: linear-gradient(135deg, rgba(37,99,235,0.15), rgba(6,182,212,0.08)); top: 10px; left: 10px; transform: rotate(-3deg); }
.sc3 { background: linear-gradient(135deg, rgba(139,92,246,0.12), rgba(59,130,246,0.08)); top: 20px; left: 20px; transform: rotate(2deg); }

/* 浮动形状 */
.floating-shape { position: absolute; border-radius: 50%; animation: float 5s ease-in-out infinite; }
.s1 { width: 120px; height: 120px; top: 10%; left: 60%; background: radial-gradient(circle, rgba(124,58,237,0.08) 0%, transparent 70%); animation-delay: 0.3s; }
.s2 { width: 200px; height: 200px; bottom: 10%; left: 30%; background: radial-gradient(circle, rgba(37,99,235,0.06) 0%, transparent 70%); animation-delay: 1.2s; }
.s3 { width: 80px; height: 80px; top: 50%; right: 5%; background: radial-gradient(circle, rgba(6,182,212,0.08) 0%, transparent 70%); animation-delay: 0.8s; }

@keyframes float { 0%, 100% { transform: translateY(0) rotate(0deg); } 50% { transform: translateY(-15px) rotate(2deg); } }

.hero-content { position: relative; z-index: 2; text-align: center; max-width: 720px; }
.hero-title { margin-bottom: 20px; }
.gradient-text { display: block; font-size: 56px; font-weight: 800; background: linear-gradient(135deg, #7c3aed, #2563eb, #06b6d4); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; line-height: 1.2; }
.sub-line { display: block; font-size: 36px; font-weight: 600; color: var(--text); margin-top: 8px; }
.hero-subtitle { font-size: 18px; color: var(--text-secondary); margin-bottom: 36px; min-height: 27px; }
.hero-actions { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }

/* ===== 问心模型矩阵 ===== */
.models-section { padding: 100px 0; background: var(--bg-blue); }
.model-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.model-card { border-radius: var(--radius); padding: 32px; transition: var(--transition); position: relative; overflow: hidden; }
.model-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }

/* 主推卡 */
.model-main { grid-row: span 2; background: linear-gradient(135deg, #7c3aed, #4c1d95); color: #fff; display: flex; flex-direction: column; justify-content: space-between; }
.mc-tag { display: inline-block; padding: 4px 14px; border-radius: 20px; background: rgba(255,255,255,0.2); color: #fff; font-size: 12px; font-weight: 600; margin-bottom: 20px; width: fit-content; }
.mc-title { font-size: 22px; font-weight: 700; margin-bottom: 12px; }
.mc-desc { font-size: 14px; color: rgba(255,255,255,0.85); line-height: 1.7; margin-bottom: 20px; }
.mc-features { list-style: none; margin-bottom: 24px; }
.mc-features li { font-size: 14px; color: rgba(255,255,255,0.9); margin-bottom: 8px; }
.mc-foot { display: flex; align-items: center; justify-content: space-between; padding-top: 20px; border-top: 1px solid rgba(255,255,255,0.2); }
.mc-price { display: flex; align-items: baseline; gap: 4px; }
.mp-num { font-size: 28px; font-weight: 800; }
.mp-unit { font-size: 13px; color: rgba(255,255,255,0.7); }
.mc-btn { padding: 10px 24px; border-radius: var(--radius-sm); font-size: 14px; font-weight: 600; text-align: center; transition: var(--transition); }
.mc-btn-primary { background: #fff; color: var(--purple); }
.mc-btn-primary:hover { background: rgba(255,255,255,0.9); transform: translateY(-1px); }

/* 普通卡 */
.model-sub { background: var(--bg); border: 1px solid var(--border); display: flex; flex-direction: column; justify-content: space-between; }
.ms-head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 12px; }
.ms-head h3 { font-size: 18px; font-weight: 700; color: var(--text); }
.ms-tag { padding: 3px 10px; border-radius: 20px; font-size: 11px; font-weight: 600; }
.ms-tag-blue { background: rgba(37,99,235,0.1); color: var(--blue); }
.ms-tag-red { background: rgba(239,68,68,0.1); color: #ef4444; }
.ms-desc { font-size: 13px; color: var(--text-secondary); line-height: 1.6; margin-bottom: 16px; flex: 1; }
.ms-foot { display: flex; align-items: center; justify-content: space-between; padding-top: 14px; border-top: 1px solid var(--border); }
.ms-price { font-size: 13px; color: var(--text-muted); }
.ms-price span { font-size: 18px; font-weight: 700; color: var(--purple); }
.ms-btn { font-size: 13px; color: var(--blue); font-weight: 600; transition: var(--transition); }
.ms-btn:hover { color: var(--purple); }

@media (max-width: 992px) {
    .model-grid { grid-template-columns: 1fr; }
    .model-main { grid-row: auto; }
}

/* ===== 产品入口横条 ===== */
.product-bar { padding: 24px 0; background: var(--bg); border-bottom: 1px solid var(--border); }
.bar-items { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }
.bar-item { display: flex; align-items: center; gap: 8px; padding: 10px 20px; border-radius: var(--radius-sm); background: var(--bg-blue); color: var(--text-secondary); font-size: 14px; font-weight: 500; transition: var(--transition); }
.bar-item:hover { background: linear-gradient(135deg, rgba(124,58,237,0.08), rgba(37,99,235,0.08)); color: var(--purple); transform: translateY(-2px); }
.bar-icon { width: 20px; height: 20px; color: var(--purple); }

/* ===== 通用区块标题 ===== */
.section-header { text-align: center; margin-bottom: 56px; }
.section-title { font-size: 36px; font-weight: 700; margin-bottom: 12px; }
.section-desc { font-size: 16px; color: var(--text-secondary); }

/* ===== 核心能力 ===== */
.capabilities { padding: 100px 0; background: var(--bg); }
.capability-list { display: flex; flex-direction: column; gap: 48px; }
.capability-row { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: center; padding: 32px; border-radius: var(--radius); background: var(--bg-blue); }
.capability-row.reverse { direction: rtl; }
.capability-row.reverse > * { direction: ltr; }
.cap-num { display: inline-block; font-size: 14px; font-weight: 700; color: var(--purple); background: rgba(124,58,237,0.1); padding: 4px 12px; border-radius: 20px; margin-bottom: 12px; }
.capability-info h3 { font-size: 28px; font-weight: 700; margin-bottom: 16px; }
.capability-info p { font-size: 15px; color: var(--text-secondary); line-height: 1.8; }
.capability-visual { display: flex; align-items: center; justify-content: center; min-height: 200px; position: relative; }
.v-card { position: absolute; width: 100px; height: 120px; border-radius: 14px; border: 1px solid rgba(124,58,237,0.2); }
.v1 .v-card:nth-child(1) { background: linear-gradient(135deg, rgba(124,58,237,0.2), rgba(37,99,235,0.1)); transform: rotate(-10deg) translateX(-30px); }
.v1 .v-card:nth-child(2) { background: linear-gradient(135deg, rgba(37,99,235,0.15), rgba(6,182,212,0.08)); transform: rotate(0deg); z-index: 2; }
.v1 .v-card:nth-child(3) { background: linear-gradient(135deg, rgba(139,92,246,0.12), rgba(59,130,246,0.08)); transform: rotate(10deg) translateX(30px); }
.v-cube { width: 60px; height: 60px; border-radius: 12px; position: absolute; }
.v2 .v-cube:nth-child(1) { background: linear-gradient(135deg, rgba(37,99,235,0.2), rgba(6,182,212,0.1)); top: 20%; left: 30%; transform: rotate(-8deg); }
.v2 .v-cube:nth-child(2) { background: linear-gradient(135deg, rgba(124,58,237,0.15), rgba(139,92,246,0.08)); bottom: 20%; right: 30%; transform: rotate(8deg); }
.v-shield { width: 80px; height: 100px; border-radius: 0 0 40px 40px; background: linear-gradient(135deg, rgba(124,58,237,0.15), rgba(37,99,235,0.1)); border: 1px solid rgba(124,58,237,0.2); position: relative; }
.v-shield::before { content: ''; position: absolute; top: -40px; left: 0; right: 0; height: 40px; background: linear-gradient(135deg, rgba(124,58,237,0.15), rgba(37,99,235,0.1)); border-radius: 40px 40px 0 0; border: 1px solid rgba(124,58,237,0.2); border-bottom: none; }
.v-ring { width: 100px; height: 100px; border-radius: 50%; border: 3px solid rgba(124,58,237,0.2); position: relative; }
.v-ring::before { content: ''; position: absolute; top: 20px; left: 20px; right: 20px; bottom: 20px; border-radius: 50%; border: 2px solid rgba(37,99,235,0.15); }
.v-dot { width: 16px; height: 16px; border-radius: 50%; background: linear-gradient(135deg, #7c3aed, #2563eb); position: absolute; top: 50%; left: 50%; transform: translate(-50%, -50%); }

/* ===== 产品体系概览 ===== */
.products { padding: 100px 0; background: var(--bg); }
.product-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.product-card { background: var(--bg); border-radius: var(--radius); padding: 28px; box-shadow: var(--shadow); border: 1px solid var(--border); transition: var(--transition); text-align: center; }
.product-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.pc-icon { width: 48px; height: 48px; border-radius: 12px; display: flex; align-items: center; justify-content: center; margin: 0 auto 16px; }
.pc-icon svg { width: 24px; height: 24px; }
.pc-penetrate { background: linear-gradient(135deg, rgba(245,158,11,0.1), rgba(245,158,11,0.05)); color: #f59e0b; }
.pc-risk { background: linear-gradient(135deg, rgba(239,68,68,0.1), rgba(239,68,68,0.05)); color: #ef4444; }
.pc-compliance { background: linear-gradient(135deg, rgba(16,185,129,0.1), rgba(16,185,129,0.05)); color: #10b981; }
.pc-contract { background: linear-gradient(135deg, rgba(37,99,235,0.1), rgba(37,99,235,0.05)); color: #2563eb; }
.pc-finance { background: linear-gradient(135deg, rgba(124,58,237,0.1), rgba(124,58,237,0.05)); color: #7c3aed; }
.pc-accounting { background: linear-gradient(135deg, rgba(6,182,212,0.1), rgba(6,182,212,0.05)); color: #06b6d4; }
.pc-treasury { background: linear-gradient(135deg, rgba(139,92,246,0.1), rgba(139,92,246,0.05)); color: #8b5cf6; }
.pc-legal { background: linear-gradient(135deg, rgba(100,116,139,0.1), rgba(100,116,139,0.05)); color: #64748b; }
.pc-audit { background: linear-gradient(135deg, rgba(245,158,11,0.1), rgba(245,158,11,0.05)); color: #f59e0b; }
.pc-rectify { background: linear-gradient(135deg, rgba(239,68,68,0.1), rgba(239,68,68,0.05)); color: #ef4444; }
.pc-data { background: linear-gradient(135deg, rgba(37,99,235,0.1), rgba(37,99,235,0.05)); color: #2563eb; }
.pc-tax { background: linear-gradient(135deg, rgba(234,88,12,0.1), rgba(234,88,12,0.05)); color: #ea580c; }
.pc-smart-audit { background: linear-gradient(135deg, rgba(147,51,234,0.1), rgba(147,51,234,0.05)); color: #9333ea; }
.pc-biz-platform { background: linear-gradient(135deg, rgba(5,150,105,0.1), rgba(5,150,105,0.05)); color: #059669; }
.pc-dev-platform { background: linear-gradient(135deg, rgba(99,102,241,0.1), rgba(99,102,241,0.05)); color: #6366f1; }
.product-card h3 { font-size: 17px; font-weight: 600; margin-bottom: 10px; }
.product-card p { font-size: 13px; color: var(--text-secondary); line-height: 1.6; margin-bottom: 16px; }
.pc-tags { display: flex; flex-wrap: wrap; gap: 6px; justify-content: center; }
.pc-tags span { font-size: 11px; padding: 4px 10px; border-radius: 20px; background: var(--bg-blue); color: var(--text-secondary); }

/* ===== 三大一体化解决方案 ===== */
.solutions { padding: 100px 0; background: var(--bg-blue); }
.solution-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.solution-card { background: var(--bg); border-radius: var(--radius); padding: 32px; box-shadow: var(--shadow); border: 1px solid var(--border); transition: var(--transition); }
.solution-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.sol-header { display: flex; align-items: center; gap: 14px; margin-bottom: 16px; }
.sol-icon { width: 44px; height: 44px; border-radius: 12px; display: flex; align-items: center; justify-content: center; flex-shrink: 0; }
.sol-icon svg { width: 22px; height: 22px; }
.sol-risk { background: linear-gradient(135deg, rgba(239,68,68,0.1), rgba(239,68,68,0.05)); color: #ef4444; }
.sol-finance { background: linear-gradient(135deg, rgba(37,99,235,0.1), rgba(37,99,235,0.05)); color: #2563eb; }
.sol-ai { background: linear-gradient(135deg, rgba(124,58,237,0.1), rgba(124,58,237,0.05)); color: #7c3aed; }
.solution-card h3 { font-size: 20px; font-weight: 600; }
.solution-card p { font-size: 14px; color: var(--text-secondary); line-height: 1.7; margin-bottom: 20px; }
.sol-modules { display: flex; flex-wrap: wrap; gap: 8px; }
.sol-modules span { font-size: 12px; padding: 6px 12px; border-radius: 20px; background: var(--bg-blue); color: var(--text-secondary); transition: var(--transition); }
.sol-modules span:hover { background: linear-gradient(135deg, rgba(124,58,237,0.08), rgba(37,99,235,0.08)); color: var(--purple); }

/* ===== 穿透监管 ===== */
.modules { padding: 100px 0; background: var(--bg-blue); }

/* 顶部三个大卡片 */
.pen-cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; margin-bottom: 48px; }
.pen-card { background: var(--bg); border-radius: var(--radius); padding: 32px; box-shadow: var(--shadow); transition: var(--transition); border: 1px solid var(--border); }
.pen-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); }
.pen-icon { width: 48px; height: 48px; border-radius: 12px; display: flex; align-items: center; justify-content: center; margin-bottom: 20px; }
.pen-icon svg { width: 24px; height: 24px; }
.pen-invest { background: linear-gradient(135deg, rgba(245,158,11,0.1), rgba(245,158,11,0.05)); color: #f59e0b; }
.pen-finance { background: linear-gradient(135deg, rgba(37,99,235,0.1), rgba(37,99,235,0.05)); color: #2563eb; }
.pen-procure { background: linear-gradient(135deg, rgba(124,58,237,0.1), rgba(124,58,237,0.05)); color: #7c3aed; }
.pen-card h3 { font-size: 20px; font-weight: 600; margin-bottom: 10px; }
.pen-desc { font-size: 14px; color: var(--text-secondary); margin-bottom: 20px; line-height: 1.7; }

/* 穿透链路 */
.pen-chain { display: flex; align-items: center; flex-wrap: wrap; gap: 6px; margin-bottom: 20px; padding: 16px; background: var(--bg-blue); border-radius: var(--radius-sm); }
.pen-chain span { padding: 6px 14px; border-radius: 20px; background: linear-gradient(135deg, #7c3aed, #2563eb); color: #fff; font-size: 12px; font-weight: 500; white-space: nowrap; }
.pen-chain i { color: var(--purple); font-style: normal; font-weight: 700; font-size: 14px; }
.pen-features { display: flex; flex-wrap: wrap; gap: 8px; }
.pen-features span { font-size: 12px; padding: 4px 10px; border-radius: 20px; background: var(--bg-blue); color: var(--text-secondary); }

/* 标签页区域 */
.pen-tabs-wrap { background: var(--bg); border-radius: var(--radius); padding: 32px; box-shadow: var(--shadow); border: 1px solid var(--border); }
.pen-tabs { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 24px; border-bottom: 1px solid var(--border); padding-bottom: 16px; }
.pen-tab { padding: 8px 16px; border-radius: 20px; border: none; background: transparent; color: var(--text-secondary); font-size: 14px; font-weight: 500; cursor: pointer; transition: var(--transition); }
.pen-tab:hover { background: var(--bg-blue); color: var(--purple); }
.pen-tab.active { background: linear-gradient(135deg, #7c3aed, #2563eb); color: #fff; }
.pen-panel { display: none; animation: fadeIn 0.3s ease; }
.pen-panel.active { display: block; }

/* 详情面板 */
.pen-detail { padding: 8px 0; }
.pen-detail-header { margin-bottom: 20px; }
.pen-detail-header h4 { font-size: 22px; font-weight: 700; margin-bottom: 10px; }
.pen-mind { font-size: 15px; color: var(--text-secondary); line-height: 1.8; }
.pen-detail .pen-chain { margin-bottom: 20px; }
.pen-detail-features { display: flex; flex-wrap: wrap; gap: 10px; }
.pen-detail-features span { padding: 8px 16px; border-radius: var(--radius-sm); background: var(--bg-blue); color: var(--text-secondary); font-size: 13px; transition: var(--transition); }
.pen-detail-features span:hover { background: linear-gradient(135deg, rgba(124,58,237,0.08), rgba(37,99,235,0.08)); color: var(--purple); }
.modules-cta { text-align: center; margin-top: 40px; }

/* ===== 智能财务 ===== */
.ai-finance { padding: 100px 0; background: var(--bg-blue); }
.ai-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; margin-bottom: 40px; }
.ai-card { background: var(--bg); border-radius: var(--radius); padding: 28px; box-shadow: var(--shadow); border: 1px solid var(--border); transition: var(--transition); text-align: center; }
.ai-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.ai-icon { width: 48px; height: 48px; margin: 0 auto 16px; border-radius: 12px; background: var(--bg-blue); color: var(--purple); display: flex; align-items: center; justify-content: center; }
.ai-icon svg { width: 24px; height: 24px; }
.ai-card h4 { font-size: 17px; font-weight: 600; margin-bottom: 10px; }
.ai-card p { font-size: 13px; color: var(--text-secondary); line-height: 1.6; }
.ai-detail { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
.ai-detail-item { background: var(--bg); border-radius: var(--radius); padding: 28px; border: 1px solid var(--border); }
.ai-detail-item h4 { font-size: 18px; font-weight: 600; margin-bottom: 10px; }
.ai-detail-item p { font-size: 14px; color: var(--text-secondary); line-height: 1.7; margin-bottom: 16px; }
.ai-tags { display: flex; flex-wrap: wrap; gap: 8px; }
.ai-tags span { font-size: 12px; padding: 4px 12px; border-radius: 20px; background: var(--bg-blue); color: var(--text-secondary); }

/* ===== 技术架构 ===== */
.architecture { padding: 100px 0; background: var(--bg); }
.arch-stack { max-width: 700px; margin: 0 auto 56px; }
.arch-layer { display: flex; align-items: center; gap: 20px; padding: 16px 24px; border-radius: var(--radius-sm); background: var(--bg-blue); margin-bottom: 12px; }
.al-label { font-size: 13px; font-weight: 600; color: var(--purple); min-width: 80px; }
.al-items { display: flex; gap: 10px; flex-wrap: wrap; flex: 1; }
.al-items span { padding: 8px 16px; border-radius: 20px; background: var(--bg); font-size: 13px; color: var(--text-secondary); border: 1px solid var(--border); }
.al-items span.al-core { background: linear-gradient(135deg, #7c3aed, #2563eb); color: #fff; border-color: transparent; font-weight: 600; }
.arch-line { width: 2px; height: 16px; background: linear-gradient(to bottom, var(--purple), transparent); margin: 4px auto; opacity: 0.3; }
.tech-row { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.tech-card { text-align: center; padding: 32px 20px; border-radius: var(--radius); background: var(--bg); border: 1px solid var(--border); transition: var(--transition); }
.tech-card:hover { transform: translateY(-4px); box-shadow: var(--shadow); border-color: var(--purple-light); }
.tc-icon { width: 48px; height: 48px; margin: 0 auto 16px; border-radius: 12px; background: var(--bg-blue); color: var(--purple); display: flex; align-items: center; justify-content: center; }
.tc-icon svg { width: 24px; height: 24px; }
.tech-card h4 { font-size: 16px; font-weight: 600; margin-bottom: 8px; }
.tech-card p { font-size: 13px; color: var(--text-secondary); line-height: 1.6; }

/* ===== 应用场景 ===== */
.scenarios { padding: 100px 0; background: var(--bg-blue); }
.scenario-showcase { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: center; margin-bottom: 48px; padding: 48px; border-radius: var(--radius); background: var(--bg); box-shadow: var(--shadow); }
.sc-text h3 { font-size: 28px; font-weight: 700; margin-bottom: 16px; }
.sc-text p { font-size: 15px; color: var(--text-secondary); line-height: 1.8; margin-bottom: 24px; }
.sc-features { display: flex; gap: 24px; }
.scf { display: flex; align-items: center; gap: 10px; }
.scf-icon { width: 32px; height: 32px; border-radius: 50%; background: linear-gradient(135deg, #7c3aed, #2563eb); color: #fff; font-size: 13px; font-weight: 700; display: flex; align-items: center; justify-content: center; }
.scf span { font-size: 14px; color: var(--text-secondary); font-weight: 500; }
.sc-visual { display: flex; align-items: center; justify-content: center; gap: 16px; min-height: 240px; position: relative; }
.scv-box { width: 80px; height: 100px; border-radius: 14px; border: 1px solid rgba(124,58,237,0.2); }
.scv-box:nth-child(1) { background: linear-gradient(135deg, rgba(124,58,237,0.2), rgba(37,99,235,0.1)); transform: rotate(-8deg); }
.scv-box:nth-child(2) { background: linear-gradient(135deg, rgba(37,99,235,0.15), rgba(6,182,212,0.08)); transform: rotate(0deg); z-index: 2; width: 90px; height: 110px; }
.scv-box:nth-child(3) { background: linear-gradient(135deg, rgba(139,92,246,0.12), rgba(59,130,246,0.08)); transform: rotate(8deg); }
.scenario-cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.sc-card { background: var(--bg); border-radius: var(--radius); padding: 28px; border: 1px solid var(--border); transition: var(--transition); position: relative; overflow: hidden; }
.sc-card:hover { transform: translateY(-4px); box-shadow: var(--shadow); }
.scc-bg { position: absolute; top: 0; right: 0; width: 80px; height: 80px; border-radius: 0 0 0 80px; opacity: 0.1; }
.bg-risk { background: #f59e0b; }
.bg-audit { background: #10b981; }
.bg-invest { background: #2563eb; }
.sc-card h4 { font-size: 18px; font-weight: 600; margin-bottom: 8px; position: relative; z-index: 1; }
.sc-card p { font-size: 14px; color: var(--text-secondary); line-height: 1.6; position: relative; z-index: 1; }

/* ===== 关于 & 联系我们（合并） ===== */
.about { padding: 100px 0; background: var(--bg); }
.about-contact-wrap { display: grid; grid-template-columns: 1fr auto; gap: 80px; align-items: center; }
.about-left h2 { font-size: 36px; font-weight: 700; margin-bottom: 20px; }
.about-intro { font-size: 15px; color: var(--text-secondary); line-height: 1.9; margin-bottom: 32px; }
.about-contact-info { display: flex; flex-direction: column; gap: 18px; padding-top: 24px; border-top: 1px solid var(--border); }
.aci-row { display: flex; align-items: center; gap: 16px; }
.aci-icon { width: 48px; height: 48px; border-radius: 12px; background: var(--bg-blue); display: flex; align-items: center; justify-content: center; font-size: 22px; flex-shrink: 0; }
.aci-text { display: flex; flex-direction: column; gap: 2px; }
.aci-text strong { font-size: 14px; font-weight: 600; color: var(--text); }
.aci-text span { font-size: 17px; color: var(--purple); font-weight: 700; letter-spacing: 0.5px; }
.about-qr-side { text-align: center; flex-shrink: 0; }
.about-qr-side img { width: 240px; height: 240px; border-radius: 18px; border: 2px solid var(--border); object-fit: contain; background: #fff; box-shadow: var(--shadow-lg); }
.about-qr-side p { margin-top: 14px; font-size: 14px; color: var(--text-muted); font-weight: 500; }

@media (max-width: 992px) {
    .about-contact-wrap { grid-template-columns: 1fr; gap: 40px; }
    .about-qr-side img { width: 200px; height: 200px; }
}

/* ===== CTA ===== */
.cta { padding: 100px 0; background: linear-gradient(135deg, #7c3aed, #2563eb); text-align: center; }
.cta h2 { font-size: 36px; font-weight: 700; color: #fff; margin-bottom: 12px; }
.cta p { font-size: 16px; color: rgba(255,255,255,0.75); margin-bottom: 32px; }
.cta-actions { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }

/* ===== Footer ===== */
.footer { padding: 48px 0 24px; background: #f8fafc; border-top: 1px solid var(--border); }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 48px; margin-bottom: 36px; }
.footer-brand p { font-size: 14px; color: var(--text-muted); line-height: 1.7; margin-top: 12px; }
.footer-links h4 { font-size: 14px; font-weight: 600; margin-bottom: 16px; }
.footer-links li { margin-bottom: 10px; }
.footer-links a { font-size: 14px; color: var(--text-muted); transition: var(--transition); }
.footer-links a:hover { color: var(--purple); }
.footer-bottom { text-align: center; padding-top: 24px; border-top: 1px solid var(--border); }
.footer-bottom p { font-size: 13px; color: var(--text-muted); }

/* ===== 客户案例滚动墙 ===== */
.clients-section { padding: 100px 0 60px; background: var(--bg); overflow: hidden; }
.clients-marquee { width: 100%; overflow: hidden; position: relative; padding: 16px 0; }
.clients-marquee::before, .clients-marquee::after { content: ''; position: absolute; top: 0; bottom: 0; width: 120px; z-index: 2; pointer-events: none; }
.clients-marquee::before { left: 0; background: linear-gradient(90deg, #fff 0%, transparent 100%); }
.clients-marquee::after { right: 0; background: linear-gradient(270deg, #fff 0%, transparent 100%); }
.clients-track { display: flex; gap: 20px; width: max-content; animation: clientScroll 60s linear infinite; }
.clients-track:hover { animation-play-state: paused; }
@keyframes clientScroll { 0% { transform: translateX(0); } 100% { transform: translateX(-50%); } }
.client-card { flex: 0 0 auto; display: flex; flex-direction: column; align-items: center; width: 240px; background: var(--bg); border: 1px solid var(--border); border-radius: 14px; padding: 28px 20px 22px; transition: var(--transition); cursor: default; text-align: center; }
.client-card:hover { border-color: var(--purple-light); box-shadow: var(--shadow); transform: translateY(-3px); }
.cc-logo { max-width: 160px; height: 48px; object-fit: contain; margin-bottom: 14px; }
.cc-name { font-size: 16px; font-weight: 700; color: var(--text); margin-bottom: 8px; white-space: nowrap; }
.cc-desc { font-size: 12px; line-height: 1.6; color: var(--text-secondary); margin: 0; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }

/* ===== 响应式 ===== */
@media (max-width: 992px) {
    .gradient-text { font-size: 42px; }
    .sub-line { font-size: 28px; }
    .capability-row, .about-wrap, .scenario-showcase { grid-template-columns: 1fr; gap: 40px; }
    .capability-row.reverse { direction: ltr; }
    .product-grid { grid-template-columns: repeat(3, 1fr); }
    .solution-grid { grid-template-columns: repeat(2, 1fr); }
    .pen-cards { grid-template-columns: repeat(2, 1fr); }
    .ai-grid { grid-template-columns: repeat(2, 1fr); }
    .ai-detail { grid-template-columns: 1fr; }
    .tech-row { grid-template-columns: repeat(2, 1fr); }
    .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 768px) {
    .nav-links { display: none; position: absolute; top: 64px; left: 0; right: 0; background: #fff; border-bottom: 1px solid var(--border); padding: 16px 24px; flex-direction: column; gap: 0; }
    .nav-links.active { display: flex; }
    .nav-link { padding: 12px 0; border-bottom: 1px solid var(--border); }
    .mobile-toggle { display: flex; }
    .gradient-text { font-size: 32px; }
    .sub-line { font-size: 22px; }
    .product-grid { grid-template-columns: repeat(2, 1fr); }
    .solution-grid { grid-template-columns: 1fr; }
    .pen-cards { grid-template-columns: 1fr; }
    .pen-chain { justify-content: center; }
    .ai-grid { grid-template-columns: 1fr; }
    .tech-row { grid-template-columns: 1fr; }
    .scenario-cards { grid-template-columns: 1fr; }
    .sc-features { flex-direction: column; gap: 12px; }
    .pen-tabs { gap: 6px; }
    .pen-tab { padding: 6px 12px; font-size: 13px; }
    .footer-grid { grid-template-columns: 1fr; gap: 32px; }
    .about-stats { gap: 24px; }
    .hero-visual { display: none; }
    .card-stack { display: none; }
}

/* ===== 旧联系我们区块已合并到关于区块 ===== */