/* ============================================================
   星烁艺雕 官网多页版 共享样式 v1（2026-10-28）
   沿用 V2 配色与全部组件，新增：子页页头/详情/FAQ/特性表/CTA带/导航高亮
   ============================================================ */
:root {
    --primary: #2374D9;
    --primary-light: #5297F2;
    --primary-bg: #E8F1FD;
    --primary-dark: #185BB3;
    --accent: #FF7D33;
    --accent-light: #FFEADC;
    --accent-dark: #E6631A;
    --white: #FFFFFF;
    --text-main: #1D2939;
    --text-secondary: #475467;
    --text-muted: #667085;
    --border: #F2F4F7;
    --bg-light: #FAFAFA;
}
* { 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(--white); color: var(--text-main); line-height: 1.7; }
a { text-decoration: none; color: inherit; }
ul { list-style: none; }
img { max-width: 100%; display: block; }
.container { max-width: 1200px; margin: 0 auto; padding: 0 40px; }

/* ===== 导航栏 ===== */
.nav { position: fixed; top: 0; left: 0; right: 0; z-index: 1000; background: rgba(255,255,255,0.92); backdrop-filter: blur(12px); padding: 18px 40px; display: flex; justify-content: space-between; align-items: center; border-bottom: 1px solid var(--border); transition: all 0.3s; }
.nav.scrolled { box-shadow: 0 2px 20px rgba(0,0,0,0.06); padding: 14px 40px; }
.logo { font-size: 26px; font-weight: 800; color: var(--primary); letter-spacing: 1px; }
.logo span { color: var(--accent); }
.nav-links { display: flex; gap: 36px; align-items: center; }
.nav-links a { color: var(--text-secondary); font-size: 15px; font-weight: 500; transition: color 0.3s; position: relative; }
.nav-links a::after { content: ''; position: absolute; bottom: -4px; left: 0; width: 0; height: 2px; background: var(--accent); border-radius: 2px; transition: width 0.3s; }
.nav-links a:hover { color: var(--primary); }
.nav-links a:hover::after { width: 100%; }
.nav-links a.active { color: var(--primary); font-weight: 700; }
.nav-links a.active::after { width: 100%; }
.nav-cta { background: var(--accent); color: #fff !important; padding: 10px 24px; border-radius: 8px; font-weight: 600; }
.nav-cta::after { display: none; }
.nav-cta:hover { background: var(--accent-dark); color: #fff !important; }

/* ===== 首页 Hero ===== */
.hero { position: relative; overflow: hidden; min-height: 660px; background: url(../images/hero_bg.png) center/cover no-repeat; display: flex; align-items: center; }
.hero::before { content: ''; position: absolute; top: 0; left: 0; width: 100%; height: 100%; background: linear-gradient(90deg, rgba(255,255,255,0.95) 0%, rgba(255,255,255,0.7) 40%, rgba(255,255,255,0.2) 60%, transparent 80%); }
.hero-content { position: relative; z-index: 2; width: 100%; }
.hero-left { animation: fadeInLeft 0.8s ease-out; max-width: 560px; }
.hero-badge { display: inline-flex; align-items: center; gap: 8px; background: rgba(255,255,255,0.85); backdrop-filter: blur(8px); border: 1px solid rgba(35,116,217,0.2); padding: 8px 20px; border-radius: 30px; font-size: 14px; color: var(--primary); margin-bottom: 28px; font-weight: 500; box-shadow: 0 2px 8px rgba(0,0,0,0.04); }
.hero-badge::before { content: ''; width: 8px; height: 8px; background: var(--accent); border-radius: 50%; animation: pulse 2s infinite; }
.hero-title { font-size: 52px; font-weight: 800; line-height: 1.25; margin-bottom: 20px; color: var(--text-main); letter-spacing: 1px; }
.hero-title .highlight { color: var(--primary); }
.hero-title .accent { color: var(--accent); }
.hero-subtitle { font-size: 19px; color: var(--text-secondary); margin-bottom: 36px; max-width: 520px; line-height: 1.8; }
.hero-stats { display: flex; gap: 48px; margin-bottom: 36px; }
.stat { text-align: left; }
.stat-num { font-size: 42px; font-weight: 800; color: var(--primary); line-height: 1.1; }
.stat-num .accent { color: var(--accent); }
.stat-text { font-size: 14px; color: var(--text-muted); margin-top: 6px; }
.hero-cta { display: flex; gap: 16px; }
.btn { display: inline-flex; align-items: center; gap: 10px; padding: 16px 36px; border-radius: 12px; font-size: 16px; font-weight: 600; transition: all 0.3s; cursor: pointer; border: none; }
.btn-primary { background: var(--accent); color: #fff; box-shadow: 0 4px 14px rgba(255,125,51,0.35); }
.btn-primary:hover { background: var(--accent-dark); transform: translateY(-2px); box-shadow: 0 8px 24px rgba(255,125,51,0.45); }
.btn-secondary { background: rgba(255,255,255,0.85); backdrop-filter: blur(8px); color: var(--primary); border: 2px solid var(--primary); box-shadow: 0 2px 8px rgba(0,0,0,0.04); }
.btn-secondary:hover { background: var(--white); transform: translateY(-2px); }
.btn-ghost { background: transparent; color: var(--primary); border: 2px solid var(--primary-bg); padding: 10px 22px; font-size: 14px; }
.btn-ghost:hover { border-color: var(--primary); }

/* ===== 子页页头 page-hero ===== */
.page-hero { padding: 150px 0 70px; background: linear-gradient(135deg, var(--primary-bg) 0%, #F4F9FF 100%); text-align: center; position: relative; overflow: hidden; }
.page-hero::after { content: ''; position: absolute; right: -120px; top: -120px; width: 360px; height: 360px; border-radius: 50%; background: radial-gradient(circle, rgba(35,116,217,0.10), transparent 70%); }
.page-hero .breadcrumb { font-size: 14px; color: var(--text-muted); margin-bottom: 18px; position: relative; z-index: 2; }
.page-hero .breadcrumb a { color: var(--primary); }
.page-hero h1 { font-size: 42px; font-weight: 800; margin-bottom: 16px; position: relative; z-index: 2; }
.page-hero p { font-size: 18px; color: var(--text-secondary); max-width: 680px; margin: 0 auto; position: relative; z-index: 2; }
.page-hero .section-tag { position: relative; z-index: 2; }

/* ===== 通用区块 ===== */
.section { padding: 90px 0; }
.bg-light { background: var(--bg-light); }
.section-header { text-align: center; max-width: 720px; margin: 0 auto 56px; }
.section-tag { display: inline-block; background: var(--primary-bg); color: var(--primary); padding: 6px 20px; border-radius: 20px; font-size: 14px; font-weight: 500; margin-bottom: 16px; }
.section-title { font-size: 38px; font-weight: 800; margin-bottom: 16px; color: var(--text-main); }
.section-desc { font-size: 17px; color: var(--text-secondary); line-height: 1.8; }
.center-btns { text-align: center; margin-top: 48px; }

/* ===== 案例 ===== */
.cases-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 32px; align-items: stretch; }
.case-card { background: var(--white); border-radius: 16px; overflow: hidden; box-shadow: 0 2px 12px rgba(0,0,0,0.06); transition: all 0.4s; display: flex; flex-direction: column; height: 100%; }
.case-card:hover { transform: translateY(-8px); box-shadow: 0 16px 40px rgba(0,0,0,0.12); }
.case-visual { position: relative; height: 260px; overflow: hidden; }
.case-visual img { width: 100%; height: 100%; object-fit: cover; display: block; transition: transform .5s ease; }
.case-card:hover .case-visual img { transform: scale(1.04); }
.case-visual::after { content:''; position:absolute; inset:0; background:linear-gradient(180deg,rgba(15,40,80,0) 72%,rgba(15,40,80,0.10) 100%); pointer-events:none; }
.case-info { padding: 28px 32px; display: flex; flex-direction: column; flex: 1; }
.case-tag { display: inline-block; background: var(--accent-light); color: var(--accent); padding: 4px 14px; border-radius: 12px; font-size: 13px; font-weight: 500; margin-bottom: 12px; align-self: flex-start; }
.case-title { font-size: 22px; font-weight: 700; margin-bottom: 8px; color: var(--text-main); }
.case-desc { font-size: 15px; color: var(--text-secondary); line-height: 1.7; flex: 1; }
.case-points { margin: 16px 0 4px; }
.case-points li { font-size: 14px; color: var(--text-secondary); padding: 5px 0 5px 24px; position: relative; }
.case-points li::before { content: '✓'; position: absolute; left: 0; color: var(--primary); font-weight: bold; }
.case-link { color: var(--primary); font-size: 14px; font-weight: 600; margin-top: 18px; display: inline-flex; align-items: center; gap: 6px; transition: gap 0.3s; }
.case-card:hover .case-link { gap: 10px; }

/* ===== 服务 ===== */
.services-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 32px; align-items: stretch; }
.service-card { background: var(--white); border: 2px solid var(--border); border-radius: 16px; padding: 48px 40px; transition: all 0.4s; position: relative; overflow: hidden; display: flex; flex-direction: column; height: 100%; }
.service-card::before { content: ''; position: absolute; top: 0; left: 0; width: 100%; height: 4px; background: linear-gradient(90deg, var(--primary), var(--primary-light)); border-radius: 4px 4px 0 0; transform: scaleX(0); transition: transform 0.4s; }
.service-card:hover::before { transform: scaleX(1); }
.service-card:hover { border-color: var(--primary-light); transform: translateY(-4px); box-shadow: 0 12px 36px rgba(35,116,217,0.1); }
.service-icon { width: 64px; height: 64px; background: var(--primary-bg); border-radius: 14px; display: flex; align-items: center; justify-content: center; margin-bottom: 24px; }
.service-icon.web { background: linear-gradient(135deg, #E8F1FD, #D1E4FC); }
.service-icon.bi { background: linear-gradient(135deg, #FFEADC, #FFD9B8); }
.service-icon svg { width: 32px; height: 32px; fill: none; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }
.service-icon.web svg { stroke: #2374D9; }
.service-icon.bi svg { stroke: #E6631A; }
.service-title { font-size: 26px; font-weight: 700; color: var(--text-main); margin-bottom: 8px; }
.service-subtitle { font-size: 16px; color: var(--accent); font-weight: 600; margin-bottom: 16px; }
.service-desc { font-size: 15px; color: var(--text-secondary); line-height: 1.9; margin-bottom: 20px; flex: 1; }
.service-features { margin-bottom: 24px; }
.service-features li { padding: 8px 0; color: var(--text-secondary); font-size: 14px; display: flex; align-items: center; gap: 10px; }
.service-features li::before { content: '✓'; color: var(--primary); font-weight: bold; font-size: 16px; }
.service-card .btn { align-self: flex-start; padding: 12px 26px; font-size: 15px; }

/* 服务详情：交付清单 / 适用场景 */
.deliver-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; margin-top: 8px; }
.deliver-card { background: var(--white); border: 1px solid var(--border); border-radius: 14px; padding: 30px 26px; }
.deliver-card .ico { width: 48px; height: 48px; border-radius: 12px; background: var(--primary-bg); display: flex; align-items: center; justify-content: center; margin-bottom: 16px; }
.deliver-card .ico svg { width: 24px; height: 24px; fill: none; stroke: var(--primary); stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }
.deliver-card h4 { font-size: 18px; margin-bottom: 10px; }
.deliver-card p { font-size: 14px; color: var(--text-secondary); line-height: 1.8; }
.split { display: grid; grid-template-columns: 1fr 1fr; gap: 56px; align-items: center; }
.split h3 { font-size: 30px; font-weight: 800; margin-bottom: 18px; }
.split h3 span { color: var(--primary); }
.split p { color: var(--text-secondary); margin-bottom: 16px; font-size: 16px; line-height: 2; }
.check-list li { display: flex; gap: 12px; align-items: flex-start; padding: 9px 0; font-size: 15px; color: var(--text-secondary); }
.check-list li::before { content: '✓'; color: var(--primary); font-weight: bold; flex-shrink: 0; }

/* ===== 流程 ===== */
.process-steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 30px; }
.step { text-align: center; position: relative; }
.step-num { width: 72px; height: 72px; background: var(--white); color: var(--primary); border-radius: 50%; display: flex; align-items: center; justify-content: center; font-size: 28px; font-weight: 800; margin: 0 auto 20px; border: 3px solid var(--primary-bg); box-shadow: 0 4px 12px rgba(35,116,217,0.1); transition: all 0.3s; }
.step:hover .step-num { background: var(--primary); color: #fff; border-color: var(--primary); transform: scale(1.1); }
.step-title { font-size: 20px; font-weight: 700; color: var(--text-main); margin-bottom: 8px; }
.step-desc { font-size: 14px; color: var(--text-secondary); line-height: 1.7; }
.step-line { position: absolute; top: 36px; left: calc(50% + 46px); width: calc(100% - 92px); height: 2px; background: var(--border); }
.step:last-child .step-line { display: none; }
/* 流程时间线（子页详版） */
.timeline { max-width: 820px; margin: 0 auto; }
.tl-item { display: grid; grid-template-columns: 64px 1fr; gap: 28px; padding: 8px 0 36px; position: relative; }
.tl-item::before { content: ''; position: absolute; left: 31px; top: 56px; bottom: -8px; width: 2px; background: var(--border); }
.tl-item:last-child::before { display: none; }
.tl-dot { width: 64px; height: 64px; border-radius: 50%; background: var(--white); border: 3px solid var(--primary-bg); color: var(--primary); font-size: 24px; font-weight: 800; display: flex; align-items: center; justify-content: center; box-shadow: 0 4px 12px rgba(35,116,217,0.1); z-index: 2; }
.tl-body { background: var(--white); border: 1px solid var(--border); border-radius: 14px; padding: 26px 30px; }
.tl-body h4 { font-size: 20px; margin-bottom: 8px; }
.tl-body .tl-tag { display: inline-block; font-size: 12px; color: var(--accent); background: var(--accent-light); padding: 2px 12px; border-radius: 10px; margin-bottom: 10px; }
.tl-body p { font-size: 14px; color: var(--text-secondary); line-height: 1.9; }
.tl-body ul { margin-top: 10px; }
.tl-body li { font-size: 14px; color: var(--text-secondary); padding: 4px 0 4px 20px; position: relative; }
.tl-body li::before { content: '·'; position: absolute; left: 6px; color: var(--primary); font-weight: bold; }

/* ===== 优势 ===== */
.advantages-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 28px; }
.advantage { text-align: center; padding: 48px 24px; background: var(--bg-light); border-radius: 16px; border: 2px solid transparent; transition: all 0.4s; }
.advantage:hover { border-color: var(--primary-light); background: var(--white); transform: translateY(-6px); box-shadow: 0 12px 32px rgba(35,116,217,0.08); }
.advantage-num { font-size: 48px; font-weight: 800; color: var(--primary); margin-bottom: 12px; line-height: 1; }
.advantage-num .accent { color: var(--accent); }
.advantage-text { font-size: 15px; color: var(--text-secondary); }

/* ===== 关于 ===== */
.about-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: center; }
.about-text h3 { font-size: 34px; font-weight: 800; color: var(--text-main); margin-bottom: 20px; }
.about-text h3 span { color: var(--primary); }
.about-text p { font-size: 16px; color: var(--text-secondary); line-height: 2; margin-bottom: 20px; }
.about-features { display: grid; grid-template-columns: 1fr 1fr; gap: 18px 16px; margin-top: 32px; }
.feature { display: flex; align-items: center; gap: 12px; }
.feature-icon { width: 46px; height: 46px; background: var(--primary-bg); border-radius: 12px; display: flex; align-items: center; justify-content: center; flex-shrink: 0; }
.feature-icon svg { width: 23px; height: 23px; fill: none; stroke: var(--primary); stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }
.feature-text { font-size: 15px; color: var(--text-main); font-weight: 600; line-height: 1.4; }
.values-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.value-card { background: var(--white); border-radius: 16px; padding: 36px 30px; border: 1px solid var(--border); text-align: center; }
.value-card .vn { font-size: 15px; font-weight: 700; color: var(--accent); letter-spacing: 2px; margin-bottom: 12px; }
.value-card h4 { font-size: 20px; margin-bottom: 12px; }
.value-card p { font-size: 14px; color: var(--text-secondary); line-height: 1.9; }

/* 关于：错位多窗口（沿用线上 aw- 隔离类名） */
.about-visual { position: relative; height: 460px; }
.aw-window { position: absolute; background: var(--white); border-radius: 14px; overflow: hidden; box-shadow: 0 24px 60px rgba(22,57,107,0.18); border: 1px solid rgba(35,116,217,0.08); }
.aw-bar { height: 38px; background: #f3f6fb; display: flex; align-items: center; gap: 7px; padding: 0 14px; border-bottom: 1px solid #eaeef4; }
.aw-bar i { width: 10px; height: 10px; border-radius: 50%; display: block; flex-shrink: 0; }
.aw-bar i.r { background: #ff5f57; } .aw-bar i.y { background: #febc2e; } .aw-bar i.g { background: #28c840; }
.aw-url { flex: 1; height: 20px; background: #fff; border-radius: 6px; margin-left: 8px; border: 1px solid #e6ebf2; }
.aw-web { width: 78%; height: 62%; top: 0; left: 0; transform: rotate(-3deg); opacity: .96; }
.aw-web .hero-block { height: 46%; margin: 14px; border-radius: 9px; background: linear-gradient(120deg,#e9f2fe,#d6e7fc); position: relative; overflow: hidden; }
.aw-web .hero-block::before { content:''; position:absolute; right:14px; top:18%; bottom:18%; width:34%; border-radius:7px; background:linear-gradient(135deg,#bcd6f7,#8fbcf2); }
.aw-web .mw-line { height: 9px; border-radius: 5px; background: #dbe5f1; margin: 0 16px 11px; }
.aw-web .mw-line.short { width: 55%; } .aw-web .mw-line.mid { width: 78%; }
.aw-web .mw-cards { display: flex; gap: 10px; margin: 14px; }
.aw-web .mw-cards span { flex: 1; height: 42px; border-radius: 8px; background: #eef3fa; position: relative; }
.aw-web .mw-cards span::after { content:''; position:absolute; left:9px; top:9px; width:46%; height:5px; border-radius:3px; background:#cfdcea; }
.aw-web .mw-cards span::before { content:''; position:absolute; left:9px; bottom:9px; width:62%; height:6px; border-radius:3px; background:#dde7f3; }
.aw-bi { width: 72%; height: 60%; right: 0; bottom: 0; transform: rotate(2.5deg); z-index: 2; border-color: rgba(255,255,255,0.10); }
.aw-bi .bi-body { position:absolute; top:38px; left:0; right:0; bottom:0; background: linear-gradient(135deg,#1b4272,#0f2b52); padding: 16px; display:flex; flex-direction:column; gap:12px; }
.aw-bi .bi-kpis { display:flex; gap:10px; }
.aw-bi .bi-kpis span { flex:1; height:46px; border-radius:8px; background:rgba(255,255,255,.10); position:relative; }
.aw-bi .bi-kpis span::after { content:''; position:absolute; left:10px; top:26px; width:52%; height:7px; border-radius:4px; background:rgba(255,255,255,.30); }
.aw-bi .bi-kpis span::before { content:''; position:absolute; left:10px; top:12px; width:30%; height:5px; border-radius:3px; background:rgba(255,255,255,.16); }
.aw-bi .bi-charts { flex:1; display:flex; gap:12px; }
.aw-bi .bi-chart { flex:1.4; border-radius:9px; background:rgba(255,255,255,.07) repeating-linear-gradient(to top, transparent 0 21px, rgba(255,255,255,.06) 21px 22px); position:relative; overflow:hidden; }
.aw-bi .bi-chart::after{content:'';position:absolute;left:14px;right:14px;bottom:16px;height:58%;background:linear-gradient(to top, rgba(90,169,255,.85),rgba(90,169,255,.15));clip-path:polygon(0 100%,0 62%,18% 70%,34% 40%,52% 52%,68% 18%,84% 30%,100% 6%,100% 100%);}
.aw-bi .bi-donut { flex:1; border-radius:9px; background:rgba(255,255,255,.07); display:flex; align-items:center; justify-content:center; }
.aw-bi .bi-donut::after{content:'';width:62px;height:62px;border-radius:50%;background:conic-gradient(#5aa9ff 0 42%,#ff9d5c 42% 70%,#43d7b0 70% 100%);-webkit-mask:radial-gradient(circle,transparent 22px,#000 23px);mask:radial-gradient(circle,transparent 22px,#000 23px);}
.aw-badge { position: absolute; z-index: 3; background: var(--white); border-radius: 12px; box-shadow: 0 10px 24px rgba(22,57,107,0.28); padding: 12px 16px; display:flex; align-items:center; gap:10px; }
.aw-badge.b1 { left: -6px; bottom: 64px; transform: rotate(-3deg); }
.aw-badge .bdot { width:34px;height:34px;border-radius:9px;background:linear-gradient(135deg,#ffe3cb,#ffc79c);display:flex;align-items:center;justify-content:center;flex-shrink:0;}
.aw-badge .bdot svg{width:18px;height:18px;fill:none;stroke:#e6631a;stroke-width:2.2;stroke-linecap:round;stroke-linejoin:round;}
.aw-badge b{display:block;font-size:17px;color:var(--text-main);line-height:1.1;}
.aw-badge small{display:block;font-size:12px;color:var(--text-secondary);}
@media (prefers-reduced-motion: no-preference) {
    .aw-web { animation: floatA 7s ease-in-out infinite; }
    .aw-bi { animation: floatB 8s ease-in-out infinite; }
}
@keyframes floatA { 0%,100%{transform:rotate(-3deg) translateY(0);} 50%{transform:rotate(-3deg) translateY(-8px);} }
@keyframes floatB { 0%,100%{transform:rotate(2.5deg) translateY(0);} 50%{transform:rotate(2.5deg) translateY(8px);} }

/* ===== FAQ ===== */
.faq { max-width: 820px; margin: 0 auto; }
.faq details { background: var(--white); border: 1px solid var(--border); border-radius: 12px; padding: 20px 26px; margin-bottom: 16px; transition: box-shadow .3s; }
.faq details[open] { box-shadow: 0 8px 24px rgba(35,116,217,0.08); border-color: var(--primary-bg); }
.faq summary { font-size: 16px; font-weight: 600; cursor: pointer; list-style: none; display: flex; justify-content: space-between; align-items: center; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: '+'; font-size: 24px; color: var(--primary); font-weight: 400; transition: transform .3s; }
.faq details[open] summary::after { transform: rotate(45deg); }
.faq details p { margin-top: 14px; font-size: 15px; color: var(--text-secondary); line-height: 1.9; }

/* ===== 联系 ===== */
.contact-band { padding: 100px 0; background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%); text-align: center; color: #fff; }
.contact-title { font-size: 40px; font-weight: 800; margin-bottom: 16px; }
.contact-desc { font-size: 18px; opacity: 0.9; margin-bottom: 40px; max-width: 560px; margin-left: auto; margin-right: auto; }
.contact-methods { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; max-width: 900px; margin: 0 auto; }
.contact-item { background: rgba(255,255,255,0.12); backdrop-filter: blur(10px); padding: 32px 24px; border-radius: 16px; transition: all 0.3s; border: 1px solid rgba(255,255,255,0.15); display: flex; flex-direction: column; align-items: center; gap: 6px; }
.contact-item:hover { background: rgba(255,255,255,0.2); transform: translateY(-4px); }
.contact-icon { font-size: 30px; line-height: 1; }
.contact-label { font-size: 14px; opacity: 0.8; }
.contact-value { font-size: 18px; font-weight: 700; overflow-wrap: anywhere; line-height: 1.5; text-wrap: balance; }
.qr-box { max-width: 460px; margin: 0 auto; background: var(--white); border-radius: 18px; padding: 36px; color: var(--text-main); }
.qr-ph { width: 220px; height: 220px; margin: 0 auto 18px; border: 2px dashed var(--border); border-radius: 14px; display: flex; align-items: center; justify-content: center; text-align: center; color: var(--text-muted); font-size: 14px; line-height: 1.8; background: var(--bg-light); }
.qr-box h4 { font-size: 20px; margin-bottom: 6px; }
.qr-box p { font-size: 14px; color: var(--text-secondary); }

/* ===== 页脚 ===== */
.footer { background: var(--text-main); color: rgba(255,255,255,0.6); padding: 48px 0 36px; }
.footer-top { display: grid; grid-template-columns: 1.4fr 1fr 1fr; gap: 40px; padding-bottom: 28px; border-bottom: 1px solid rgba(255,255,255,0.1); }
.footer-logo { font-size: 22px; font-weight: 800; color: #fff; margin-bottom: 10px; }
.footer-logo span { color: var(--accent); }
.footer h5 { color: #fff; font-size: 15px; margin-bottom: 14px; }
.footer-col a { display: block; color: rgba(255,255,255,0.6); font-size: 14px; padding: 4px 0; transition: color .3s; }
.footer-col a:hover { color: #fff; }
.footer-desc { font-size: 14px; line-height: 1.9; color: rgba(255,255,255,0.6); }
.footer-bottom { text-align: center; padding-top: 24px; font-size: 13px; line-height: 2; }
.footer-bottom a { color: inherit; text-decoration: none; }
.footer-bottom a:hover { color: #fff; }

/* ===== 动画 ===== */
@keyframes fadeInLeft { from { opacity: 0; transform: translateX(-40px); } to { opacity: 1; transform: translateX(0); } }
@keyframes fadeInUp { from { opacity: 0; transform: translateY(40px); } to { opacity: 1; transform: translateY(0); } }
@keyframes pulse { 0%, 100% { opacity: 1; } 50% { opacity: 0.4; } }
.fade-section { opacity: 0; transform: translateY(40px); transition: all 0.8s ease-out; }
.fade-section.visible { opacity: 1; transform: translateY(0); }

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
    .about-grid, .split { grid-template-columns: 1fr; gap: 40px; }
    .about-visual { height: 420px; max-width: 480px; margin: 0 auto; }
    .cases-grid, .services-grid { grid-template-columns: 1fr; }
    .process-steps { grid-template-columns: repeat(2, 1fr); }
    .advantages-grid { grid-template-columns: repeat(2, 1fr); }
    .deliver-grid, .values-grid { grid-template-columns: 1fr; }
    .step-line { display: none; }
    .hero-title { font-size: 40px; }
    .hero-stats { gap: 32px; }
    .stat-num { font-size: 32px; }
    .footer-top { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 640px) {
    .container { padding: 0 20px; }
    .nav { padding: 14px 20px; }
    .nav-links { gap: 16px; }
    .nav-links a:not(.nav-cta) { display: none; }
    .hero-title { font-size: 32px; }
    .hero-subtitle { font-size: 17px; }
    .hero-stats { flex-wrap: wrap; gap: 20px; }
    .hero-cta { flex-direction: column; }
    .process-steps { grid-template-columns: 1fr; }
    .advantages-grid { grid-template-columns: 1fr; }
    .section-title { font-size: 28px; }
    .page-hero h1 { font-size: 30px; }
    .page-hero { padding: 120px 0 50px; }
    .about-features { grid-template-columns: 1fr; }
    .contact-methods { grid-template-columns: 1fr; max-width: 340px; }
    .section { padding: 64px 0; }
    .footer-top { grid-template-columns: 1fr; gap: 28px; }
    .tl-item { grid-template-columns: 48px 1fr; gap: 16px; }
    .tl-item::before { left: 23px; }
    .tl-dot { width: 48px; height: 48px; font-size: 20px; }
}

/* ===== 手机端汉堡菜单（多页面切页必需，覆盖上方隐藏规则） ===== */
.nav-toggle {
    display: none; width: 42px; height: 42px; border: 1px solid var(--border);
    background: #fff; border-radius: 10px; cursor: pointer; padding: 0;
    align-items: center; justify-content: center; flex-direction: column; gap: 5px;
}
.nav-toggle span { display: block; width: 20px; height: 2px; background: var(--primary); border-radius: 2px; transition: .3s; }
.nav-toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

@media (max-width: 640px) {
    .nav { position: fixed; }
    .nav-toggle { display: inline-flex; }
    .nav-links {
        position: absolute; top: 100%; right: 12px; left: 12px;
        background: #fff; border: 1px solid var(--border); border-radius: 14px;
        box-shadow: 0 18px 50px rgba(22,57,107,.16);
        flex-direction: column; align-items: stretch; gap: 0; padding: 8px;
        display: none; z-index: 200;
    }
    .nav-links.open { display: flex; }
    .nav-links a { display: block !important; width: 100%; text-align: left;
        padding: 13px 14px; font-size: 16px; border-radius: 10px; }
    .nav-links a::after { display: none; }
    .nav-links a.active { background: var(--primary-bg); }
    .nav-links a.nav-cta { text-align: center; margin-top: 6px; }
    body.nav-open { overflow: hidden; }
}