/* ===== 易歪歪官网（蚂蚁蓝 #1677FF · 聊天助手 · 80%复刻参考站微调）===== */
:root {
    --primary: #1677FF;
    --primary-dark: #0958D9;
    --primary-light: #3C89FF;
    --accent: #00D084;
    --bg: #F9F9F9;
    --bg-soft: #EEF2FF;
    --card: #ffffff;
    --border: #E5E6EB;
    --title: #1A1A1A;
    --body: #1e293b;
    --muted: #A4A4A4;
    --radius: 16px;
    --shadow: 0 8px 30px rgba(22, 119, 255, 0.08);
    --shadow-lg: 0 16px 50px rgba(22, 119, 255, 0.16);
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
    font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
    background: var(--bg);
    color: var(--body);
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
}

a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }
h1, h2, h3, h4 { color: var(--title); line-height: 1.25; }

/* ===== 顶部导航 ===== */
.header { width: min(1180px, calc(100% - 48px)); margin: auto; height: 72px; display: flex; align-items: center; gap: 30px; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 800; font-size: 20px; white-space: nowrap; color: var(--title); }
.brand img.logo-full { width: auto; height: 40px; border-radius: 0; }
.brand span b { color: var(--primary); }
.nav-links { display: flex; gap: 26px; margin-left: auto; list-style: none; }
.nav-links a { font-size: 14px; color: var(--body); font-weight: 600; }
.nav-links a:hover { color: var(--primary); }
.nav-cta { margin-left: 4px; background: var(--primary); color: #fff !important; padding: 10px 18px; border-radius: 10px; font-size: 14px; font-weight: 700; }
.nav-cta:hover { background: var(--primary-dark); }
.nav-toggle { display: none; background: none; border: 0; font-size: 1.5rem; color: var(--title); cursor: pointer; }

/* ===== Hero（左右分列：左文案右侧边栏插画）===== */
.hero { width: min(1180px, calc(100% - 48px)); margin: 20px auto 80px; min-height: 560px; display: grid; grid-template-columns: 1.05fr 0.95fr; align-items: center; gap: 60px; }
.hero-badge { color: var(--primary); font-weight: 800; letter-spacing: 0.04em; font-size: 13px; display: inline-block; margin-bottom: 14px; background: var(--bg-soft); padding: 6px 14px; border-radius: 20px; }
.hero-copy h1 { font-size: clamp(42px, 5vw, 62px); line-height: 1.1; letter-spacing: -0.03em; margin: 14px 0 22px; }
.hero-copy h1 .hl { color: var(--primary); }
.hero-copy .hero-desc { font-size: 18px; color: var(--body); max-width: 620px; margin: 0 0 28px; }
.hero-actions { display: flex; gap: 14px; margin: 0 0 24px; }
.hero-actions a:first-child { background: var(--primary); color: #fff; padding: 13px 24px; border-radius: 11px; font-weight: 700; }
.hero-actions a:last-child { padding: 13px 22px; font-weight: 700; color: var(--primary); border: 1.5px solid var(--primary); border-radius: 11px; }
.hero-note { color: var(--muted); font-size: 0.88rem; }
.hero-art { min-width: 0; }
.hero-art img { margin: 0 auto; border-radius: var(--radius); box-shadow: var(--shadow-lg); }

/* ===== 场景卡 ===== */
.scenes { width: min(1180px, calc(100% - 48px)); margin: 0 auto 100px; }
.section-head { text-align: center; margin-bottom: 44px; }
.section-head > span { color: var(--primary); font-weight: 800; letter-spacing: 0.04em; font-size: 13px; }
.section-head h2 { margin-top: 10px; font-size: clamp(30px, 3.4vw, 46px); letter-spacing: -0.02em; }
.section-head > p { font-size: 17px; color: var(--body); max-width: 680px; margin: 12px auto 0; }
.scenes-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.scene-card { background: var(--card); border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow); border: 1px solid var(--border); }
.scene-card img { width: 100%; }
.scene-card .body { padding: 22px 26px 26px; }
.scene-card h3 { font-size: 20px; margin-bottom: 8px; }
.scene-card p { color: var(--body); font-size: 15px; }

/* ===== 功能流程卡 ===== */
.features { width: min(1180px, calc(100% - 48px)); margin: 0 auto 100px; }
.feature-flow { display: grid; grid-template-columns: 1fr 1fr; gap: 34px 80px; }
.feature-flow article { position: relative; padding: 24px 60px 24px 24px; background: var(--card); border: 1px solid var(--border); border-radius: 14px; box-shadow: var(--shadow); }
.feature-flow h3 { font-size: 20px; margin: 0 0 7px; }
.feature-flow p { color: var(--body); margin: 0; font-size: 15px; }
.feature-flow span { position: absolute; right: 18px; top: 18px; color: rgba(22, 119, 255, 0.18); font-size: 30px; font-weight: 900; }

/* ===== 产品 UI 卡 ===== */
.product { width: min(1180px, calc(100% - 48px)); margin: 0 auto 100px; display: grid; grid-template-columns: 0.92fr 1.08fr; gap: 80px; align-items: center; padding: 60px 0; }
.product-copy > span { color: var(--primary); font-weight: 800; letter-spacing: 0.04em; font-size: 13px; }
.product-copy h2 { font-size: clamp(30px, 3.4vw, 46px); letter-spacing: -0.02em; margin: 10px 0 16px; }
.product-copy p { font-size: 17px; color: var(--body); margin: 0; }
.product-copy a { display: inline-block; margin-top: 22px; color: var(--primary); font-weight: 700; }
.product-ui { background: var(--card); border-radius: 20px; padding: 28px; box-shadow: var(--shadow-lg); border: 1px solid var(--border); }
.ui-top { display: flex; align-items: center; gap: 10px; }
.ui-top img { width: 24px; height: 24px; border-radius: 7px; }
.ui-top b { margin-left: auto; color: var(--accent); font-size: 13px; }
.ui-main { padding: 40px 4px 30px; }
.ui-main small, .ui-main span { display: block; color: var(--muted); }
.ui-main strong { display: block; font-size: 32px; margin: 4px 0 7px; color: var(--title); }
.ui-row { display: flex; gap: 12px; }
.ui-row span { background: var(--bg); padding: 10px 12px; border-radius: 10px; color: var(--body); font-size: 13px; }

/* ===== 统计卡 ===== */
.stats { width: min(1180px, calc(100% - 48px)); margin: 0 auto 100px; }
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.stat-card { background: var(--card); border-radius: 18px; padding: 26px 20px; text-align: center; box-shadow: var(--shadow); border: 1px solid var(--border); }
.stat-card .num { font-size: 1.9rem; font-weight: 800; color: var(--primary); }
.stat-card .label { color: var(--body); font-size: 0.9rem; margin-top: 4px; }

/* ===== 兼容平台 ===== */
.nodes { width: min(1180px, calc(100% - 48px)); margin: 0 auto 100px; }
.nodes-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.node-card { background: var(--card); border-radius: 18px; padding: 22px; box-shadow: var(--shadow); border: 1px solid var(--border); }
.node-card .city { font-weight: 800; color: var(--title); margin-bottom: 4px; }
.node-card .desc { color: var(--body); font-size: 0.88rem; }

/* ===== 套餐 ===== */
.pricing { width: min(1180px, calc(100% - 48px)); margin: 0 auto 100px; }
.pricing-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 28px; align-items: stretch; max-width: 860px; margin: 0 auto; }
.plan { background: var(--card); border-radius: 20px; padding: 34px 30px; box-shadow: var(--shadow); border: 1px solid var(--border); position: relative; display: flex; flex-direction: column; }
.plan.featured { border: 2px solid var(--primary); box-shadow: var(--shadow-lg); }
.plan .tag { position: absolute; top: -13px; left: 50%; transform: translateX(-50%); background: var(--accent); color: #fff; font-size: 0.78rem; font-weight: 700; padding: 4px 16px; border-radius: 50px; }
.plan h3 { font-size: 1.2rem; margin-bottom: 6px; }
.plan .price { font-size: 2.6rem; font-weight: 800; color: var(--title); }
.plan .price small { font-size: 1rem; color: var(--muted); font-weight: 500; }
.plan ul { list-style: none; margin: 20px 0 24px; flex: 1; }
.plan li { padding: 7px 0; color: var(--body); font-size: 0.95rem; }
.plan li::before { content: "✓"; color: var(--primary); font-weight: 700; margin-right: 8px; }
.plan li.no::before { content: "✗"; color: var(--muted); font-weight: 700; margin-right: 8px; }
.plan .btn { justify-content: center; width: 100%; text-align: center; }
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; padding: 13px 22px; border-radius: 11px; font-weight: 700; transition: transform 0.15s; }
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-dark); transform: translateY(-2px); }
.btn-ghost { color: var(--primary); border: 1.5px solid var(--primary); }

/* ===== 内容正文 ===== */
.content { width: min(1120px, calc(100% - 48px)); margin: 0 auto; }
.article { max-width: 860px; margin: 0 auto; }
.article h1 { font-size: clamp(36px, 4.5vw, 54px); line-height: 1.15; letter-spacing: -0.02em; margin: 14px 0 22px; }
.article .meta { color: var(--muted); font-size: 0.9rem; margin-bottom: 28px; }
.article h2 { font-size: 1.55rem; margin: 36px 0 14px; }
.article p { margin-bottom: 18px; font-size: 16.5px; }
.article img { border-radius: var(--radius); margin: 20px 0; }
.article strong { color: var(--title); }
.article ul, .article ol { margin: 0 0 18px 22px; }
.article li { margin-bottom: 8px; }
.callout { background: var(--bg-soft); border-left: 4px solid var(--primary); padding: 16px 20px; border-radius: 10px; margin: 20px 0; }

/* ===== 下载矩阵 ===== */
.dl-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.dl-card { background: var(--card); border-radius: var(--radius); padding: 28px; text-align: center; box-shadow: var(--shadow); border: 1px solid var(--border); }
.dl-card img { width: 84px; height: 84px; margin: 0 auto 16px; border-radius: 20px; }
.dl-card h3 { margin-bottom: 8px; font-size: 1.15rem; }
.dl-card p { color: var(--body); font-size: 0.9rem; margin-bottom: 18px; }

/* ===== FAQ ===== */
.faq-list { max-width: 900px; margin: 0 auto; display: grid; grid-template-columns: 1fr 1fr; gap: 34px 60px; }
.faq-item h3 { font-size: 19px; margin: 0 0 8px; }
.faq-item p { color: var(--body); margin: 0; }

/* ===== CTA ===== */
.cta { width: min(1180px, calc(100% - 48px)); margin: 0 auto 100px; padding: 52px 60px; border-radius: 24px; background: linear-gradient(135deg, var(--primary), var(--primary-dark)); display: flex; align-items: center; justify-content: space-between; gap: 40px; }
.cta h2 { color: #fff; font-size: clamp(28px, 3.2vw, 44px); }
.cta p { color: rgba(255,255,255,0.9); font-size: 16px; }
.cta > a { background: #fff; color: var(--primary); padding: 14px 26px; border-radius: 11px; font-weight: 700; white-space: nowrap; }

/* ===== 页脚 ===== */
.footer { width: min(1180px, calc(100% - 48px)); margin: 20px auto 0; padding: 44px 0; color: var(--body); }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 32px; }
.footer h4 { color: var(--title); margin-bottom: 16px; font-size: 1rem; }
.footer ul { list-style: none; }
.footer li { margin-bottom: 10px; }
.footer a { color: var(--body); }
.footer a:hover { color: var(--primary); }
.footer .brand { color: var(--title); margin-bottom: 12px; display: flex; align-items: center; gap: 10px; font-weight: 800; font-size: 19px; }
.footer .brand img.logo-full { width: auto; height: 34px; border-radius: 0; }
.footer-desc { font-size: 13px; color: var(--muted); margin-top: 8px; }
.footer-bottom { grid-column: 1 / -1; border-top: 1px solid var(--border); padding-top: 20px; text-align: center; font-size: 0.85rem; color: var(--muted); }

/* ===== 404 ===== */
.error { text-align: center; padding: 100px 20px; }
.error h1 { font-size: 5rem; color: var(--primary); }
.error p { font-size: 1.2rem; color: var(--body); margin: 16px 0 28px; }

/* ===== 响应式 ===== */
@media (max-width: 900px) {
    .header { width: min(100% - 28px, 1180px); height: 68px; }
    .nav-links { display: none; position: absolute; top: 68px; left: 0; right: 0; background: var(--card); flex-direction: column; padding: 20px; gap: 18px; box-shadow: var(--shadow); }
    .nav-links.open { display: flex; }
    .nav-toggle { display: block; }
    .hero { width: calc(100% - 28px); grid-template-columns: 1fr; gap: 30px; padding: 24px 0; margin-bottom: 70px; min-height: 0; }
    .hero h1 { font-size: 38px; }
    .hero-art { order: 2; }
    .scenes, .features, .product, .stats, .nodes, .pricing, .cta { width: calc(100% - 28px); margin-bottom: 70px; }
    .product { grid-template-columns: 1fr; gap: 25px; padding: 20px 0; }
    .scenes-grid, .dl-grid, .pricing-grid { grid-template-columns: 1fr; }
    .stats-grid, .nodes-grid { grid-template-columns: repeat(2, 1fr); }
    .feature-flow { grid-template-columns: 1fr; }
    .faq-list { grid-template-columns: 1fr; }
    .cta { padding: 34px 28px; display: block; }
    .cta > a { margin-top: 18px; display: inline-block; }
    .footer { width: calc(100% - 28px); }
    .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 560px) {
    .hero h1 { font-size: 32px; }
    .hero-actions { flex-wrap: wrap; }
    .stats-grid, .nodes-grid, .footer-grid { grid-template-columns: 1fr; }
    .article h1 { font-size: 30px; }
    .btn { padding: 12px 20px; font-size: 0.95rem; }
}