/* ============================================================
   TG号在线购买平台 · 深蓝直供 设计系统
   Telegram 深海军蓝底 + 品牌蓝主色 + 金色（货源/秒发）强调
   ============================================================ */

:root {
    --bg: #08111f;
    --bg-2: #0b1728;
    --surface: #0e1d31;
    --surface-2: #13253e;
    --border: #1c3350;
    --border-soft: #162a44;
    --accent: #2aabee;      /* Telegram 蓝 */
    --accent-2: #4dc3ff;
    --gold: #f5b942;        /* 货源 / 秒发 金色 */
    --gold-2: #ffd47e;
    --green: #35d07f;
    --text: #eaf2fb;
    --text-2: #b8c7dc;
    --muted: #7f96b3;
    --danger: #ff7a7a;
    --shadow: 0 18px 50px rgba(2, 8, 20, 0.55);
    --glow-blue: 0 0 0 1px rgba(42, 171, 238, 0.25), 0 10px 40px rgba(42, 171, 238, 0.14);
    --radius: 16px;
    --radius-lg: 22px;
    --font: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei",
        "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

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

html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }

body {
    font-family: var(--font);
    background: var(--bg);
    color: var(--text);
    line-height: 1.7;
    overflow-x: hidden;
    background-image:
        radial-gradient(900px 500px at 85% -10%, rgba(42, 171, 238, 0.12), transparent 60%),
        radial-gradient(800px 500px at -10% 20%, rgba(42, 171, 238, 0.08), transparent 55%),
        radial-gradient(700px 600px at 50% 110%, rgba(245, 185, 66, 0.06), transparent 55%);
    background-attachment: fixed;
}

a { color: inherit; text-decoration: none; }
ul { list-style: none; }
img, svg { display: block; max-width: 100%; }

/* 网格纹理背景层 */
.grid-noise {
    position: fixed;
    inset: 0;
    pointer-events: none;
    z-index: 0;
    background-image:
        linear-gradient(rgba(42, 171, 238, 0.035) 1px, transparent 1px),
        linear-gradient(90deg, rgba(42, 171, 238, 0.035) 1px, transparent 1px);
    background-size: 46px 46px;
    mask-image: radial-gradient(1200px 800px at 50% 0%, #000 30%, transparent 80%);
    -webkit-mask-image: radial-gradient(1200px 800px at 50% 0%, #000 30%, transparent 80%);
}

/* ============ 通用容器 ============ */
.container { width: min(1160px, 92%); margin: 0 auto; position: relative; z-index: 1; }

section { padding: 84px 0; position: relative; }

.section-head { max-width: 720px; margin-bottom: 48px; }
.section-head.center { margin-left: auto; margin-right: auto; text-align: center; }
.section-head.left { text-align: left; }

.section-tag {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 13px;
    font-weight: 600;
    letter-spacing: 0.08em;
    color: var(--accent-2);
    background: rgba(42, 171, 238, 0.1);
    border: 1px solid rgba(42, 171, 238, 0.25);
    padding: 6px 14px;
    border-radius: 999px;
    margin-bottom: 18px;
}
.section-tag.gold { color: var(--gold-2); background: rgba(245, 185, 66, 0.1); border-color: rgba(245, 185, 66, 0.3); }
.section-tag .dot { width: 7px; height: 7px; border-radius: 50%; background: currentColor; box-shadow: 0 0 8px currentColor; }

.section-title { font-size: clamp(28px, 4vw, 40px); font-weight: 800; letter-spacing: -0.02em; line-height: 1.25; }
.section-title .hl { color: var(--accent-2); }
.section-title .hl-gold { color: var(--gold-2); }
.section-desc { color: var(--text-2); font-size: 16px; margin-top: 16px; }

/* ============ 按钮 ============ */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 9px;
    font-weight: 700;
    font-size: 16px;
    padding: 14px 28px;
    border-radius: 12px;
    cursor: pointer;
    transition: transform 0.18s ease, box-shadow 0.18s ease, background 0.18s ease, border-color 0.18s ease;
    white-space: nowrap;
    border: 1px solid transparent;
}
.btn .arrow { transition: transform 0.18s ease; }
.btn:hover .arrow { transform: translateX(3px); }

.btn-primary {
    background: linear-gradient(135deg, var(--accent), #1f8fd0);
    color: #04121f;
    box-shadow: 0 8px 26px rgba(42, 171, 238, 0.32);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 14px 34px rgba(42, 171, 238, 0.42); }

.btn-gold {
    background: linear-gradient(135deg, var(--gold), #e89b1c);
    color: #241400;
    box-shadow: 0 8px 26px rgba(245, 185, 66, 0.28);
}
.btn-gold:hover { transform: translateY(-2px); box-shadow: 0 14px 34px rgba(245, 185, 66, 0.4); }

.btn-ghost {
    background: rgba(255, 255, 255, 0.03);
    color: var(--text);
    border-color: var(--border);
}
.btn-ghost:hover { background: rgba(255, 255, 255, 0.07); border-color: var(--accent); transform: translateY(-2px); }

.btn-sm { padding: 10px 18px; font-size: 14px; border-radius: 10px; }

/* ============ 顶部导航 ============ */
.site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(8, 17, 31, 0.78);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    border-bottom: 1px solid var(--border-soft);
}
.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 68px;
}
.brand { display: flex; align-items: center; gap: 11px; font-weight: 800; font-size: 18px; letter-spacing: -0.01em; }
.brand .logo {
    width: 36px; height: 36px; border-radius: 10px;
    display: grid; place-items: center;
    background: linear-gradient(135deg, var(--accent), #1f8fd0);
    box-shadow: 0 6px 16px rgba(42, 171, 238, 0.35);
    flex: none;
}
.brand .logo svg { width: 20px; height: 20px; }
.brand .brand-sub { display: block; font-size: 11px; font-weight: 500; color: var(--muted); letter-spacing: 0.04em; }

.main-nav ul { display: flex; align-items: center; gap: 6px; }
.main-nav a {
    padding: 8px 14px;
    border-radius: 9px;
    font-size: 15px;
    font-weight: 500;
    color: var(--text-2);
    transition: color 0.15s ease, background 0.15s ease;
}
.main-nav a:hover { color: var(--text); background: rgba(255, 255, 255, 0.05); }
.header-cta { display: flex; align-items: center; gap: 12px; }

.menu-toggle {
    display: none;
    width: 42px; height: 42px;
    border-radius: 10px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border);
    cursor: pointer;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 5px;
}
.menu-toggle span { display: block; width: 20px; height: 2px; background: var(--text); border-radius: 2px; transition: 0.2s ease; }

/* ============ Hero ============ */
.hero { padding: 72px 0 60px; }
.hero-grid {
    display: grid;
    grid-template-columns: 1.05fr 0.95fr;
    gap: 52px;
    align-items: center;
}
.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 13px;
    font-weight: 600;
    color: var(--gold-2);
    background: rgba(245, 185, 66, 0.1);
    border: 1px solid rgba(245, 185, 66, 0.28);
    padding: 7px 15px;
    border-radius: 999px;
    margin-bottom: 22px;
}
.hero-badge .pulse { width: 8px; height: 8px; border-radius: 50%; background: var(--gold); box-shadow: 0 0 0 0 rgba(245, 185, 66, 0.7); animation: pulse 1.8s infinite; }

.hero h1 {
    font-size: clamp(34px, 5.4vw, 56px);
    font-weight: 850;
    line-height: 1.14;
    letter-spacing: -0.03em;
    margin-bottom: 22px;
}
.hero h1 .grad {
    background: linear-gradient(120deg, var(--accent-2), var(--accent) 45%, var(--gold-2));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}
.hero-sub { font-size: 17px; color: var(--text-2); max-width: 520px; margin-bottom: 30px; }
.hero-actions { display: flex; align-items: center; gap: 14px; flex-wrap: wrap; margin-bottom: 30px; }

.hero-trust { display: flex; flex-wrap: wrap; gap: 10px; }
.hero-trust span {
    display: inline-flex;
    align-items: center;
    gap: 7px;
    font-size: 13px;
    color: var(--text-2);
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--border-soft);
    padding: 7px 13px;
    border-radius: 9px;
}
.hero-trust .ic { color: var(--accent-2); font-size: 14px; }

/* Hero 右侧：号直供卡 */
.hero-visual { position: relative; }
.deliver-card {
    position: relative;
    background: linear-gradient(160deg, var(--surface-2), var(--surface));
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 28px;
    box-shadow: var(--shadow);
}
.deliver-card .dc-head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 22px; }
.deliver-card .dc-title { font-size: 13px; color: var(--muted); letter-spacing: 0.06em; text-transform: uppercase; }
.deliver-card .dc-status {
    display: inline-flex; align-items: center; gap: 7px;
    font-size: 12px; font-weight: 700; color: var(--green);
    background: rgba(53, 208, 127, 0.12);
    border: 1px solid rgba(53, 208, 127, 0.3);
    padding: 5px 11px; border-radius: 999px;
}
.deliver-card .dc-status .dot { width: 7px; height: 7px; border-radius: 50%; background: var(--green); animation: blink 1.4s infinite; }

.dc-account {
    display: flex; align-items: center; gap: 16px;
    background: rgba(42, 171, 238, 0.06);
    border: 1px dashed rgba(42, 171, 238, 0.3);
    border-radius: 14px;
    padding: 18px;
    margin-bottom: 18px;
}
.dc-account .avatar {
    width: 52px; height: 52px; border-radius: 50%;
    background: linear-gradient(135deg, var(--accent), #1f8fd0);
    display: grid; place-items: center;
    font-weight: 800; font-size: 20px; color: #04121f;
    flex: none;
    box-shadow: 0 6px 16px rgba(42, 171, 238, 0.35);
}
.dc-account .ac-name { font-weight: 700; font-size: 17px; }
.dc-account .ac-meta { font-size: 13px; color: var(--muted); margin-top: 2px; }
.dc-account .ac-tag {
    margin-left: auto; flex: none;
    font-size: 11px; font-weight: 700; color: var(--gold-2);
    background: rgba(245, 185, 66, 0.12);
    border: 1px solid rgba(245, 185, 66, 0.3);
    padding: 4px 10px; border-radius: 999px;
}

.dc-row { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.dc-item { background: rgba(255, 255, 255, 0.03); border: 1px solid var(--border-soft); border-radius: 12px; padding: 13px 15px; }
.dc-item .k { font-size: 12px; color: var(--muted); }
.dc-item .v { font-size: 15px; font-weight: 700; margin-top: 3px; }
.dc-item .v.ok { color: var(--green); }

/* 浮动装饰卡 */
.float-chip {
    position: absolute;
    background: rgba(14, 29, 49, 0.92);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 10px 15px;
    font-size: 13px;
    font-weight: 600;
    box-shadow: var(--shadow);
    display: flex; align-items: center; gap: 9px;
    animation: floaty 5s ease-in-out infinite;
}
.float-chip.fc-1 { top: -20px; right: -12px; color: var(--gold-2); }
.float-chip.fc-2 { bottom: -18px; left: -14px; color: var(--accent-2); animation-delay: 1.4s; }
.float-chip .em { font-size: 18px; }

/* ============ 数据条 ============ */
.stats-band {
    background: linear-gradient(135deg, rgba(42, 171, 238, 0.07), rgba(245, 185, 66, 0.05));
    border-top: 1px solid var(--border-soft);
    border-bottom: 1px solid var(--border-soft);
    padding: 34px 0;
}
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; text-align: center; }
.stat .num { font-size: clamp(26px, 3.4vw, 36px); font-weight: 850; letter-spacing: -0.02em; }
.stat .num .u { font-size: 0.6em; font-weight: 700; color: var(--accent-2); }
.stat .num.gold { color: var(--gold-2); }
.stat .num.blue { color: var(--accent-2); }
.stat .lbl { font-size: 14px; color: var(--muted); margin-top: 6px; }

/* ============ 核心优势 Bento ============ */
.features { background: var(--bg-2); }
.bento {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    grid-auto-rows: 168px;
    gap: 18px;
}
.feature-card {
    position: relative;
    background: linear-gradient(160deg, var(--surface-2), var(--surface));
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 24px;
    overflow: hidden;
    transition: transform 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
}
.feature-card:hover { transform: translateY(-4px); border-color: var(--accent); box-shadow: var(--glow-blue); }
.feature-card.tall { grid-row: span 2; }
.feature-card.wide { grid-column: span 2; }
.feature-card .f-ic {
    width: 46px; height: 46px; border-radius: 12px;
    display: grid; place-items: center;
    font-size: 22px;
    margin-bottom: 16px;
    background: rgba(42, 171, 238, 0.12);
    border: 1px solid rgba(42, 171, 238, 0.22);
}
.feature-card.gold .f-ic { background: rgba(245, 185, 66, 0.12); border-color: rgba(245, 185, 66, 0.26); }
.feature-card.green .f-ic { background: rgba(53, 208, 127, 0.12); border-color: rgba(53, 208, 127, 0.26); }
.feature-card h3 { font-size: 18px; font-weight: 750; margin-bottom: 8px; }
.feature-card p { font-size: 14.5px; color: var(--text-2); line-height: 1.65; }
.feature-card .f-glow {
    position: absolute; right: -40px; top: -40px;
    width: 140px; height: 140px; border-radius: 50%;
    background: radial-gradient(circle, rgba(42, 171, 238, 0.22), transparent 70%);
    filter: blur(8px);
}

/* ============ 现货秒发 pipeline ============ */
.pipeline { background: var(--bg); }
.flow {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 0;
    position: relative;
}
.flow::before {
    content: "";
    position: absolute;
    top: 40px;
    left: 8%;
    right: 8%;
    height: 2px;
    background: linear-gradient(90deg, var(--accent), var(--gold));
    opacity: 0.4;
}
.flow-step { text-align: center; padding: 0 14px; position: relative; }
.flow-step .node {
    width: 80px; height: 80px;
    margin: 0 auto 18px;
    border-radius: 50%;
    display: grid; place-items: center;
    font-size: 30px;
    background: var(--surface-2);
    border: 2px solid var(--accent);
    box-shadow: 0 0 0 6px rgba(42, 171, 238, 0.08);
    position: relative;
    z-index: 2;
}
.flow-step:nth-child(2) .node { border-color: var(--gold); box-shadow: 0 0 0 6px rgba(245, 185, 66, 0.08); }
.flow-step:nth-child(3) .node { border-color: var(--green); box-shadow: 0 0 0 6px rgba(53, 208, 127, 0.08); }
.flow-step h4 { font-size: 16px; font-weight: 750; margin-bottom: 6px; }
.flow-step p { font-size: 13.5px; color: var(--muted); }
.flow-step .bolt {
    position: absolute; top: -8px; right: 6px;
    font-size: 16px; color: var(--gold-2);
    animation: blink 1.2s infinite;
}

/* ============ 号规格 ============ */
.pricing { background: var(--bg-2); }
.price-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.price-card {
    position: relative;
    background: linear-gradient(165deg, var(--surface-2), var(--surface));
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 30px 26px;
    display: flex;
    flex-direction: column;
    transition: transform 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
}
.price-card:hover { transform: translateY(-5px); border-color: var(--accent); box-shadow: var(--shadow); }
.price-card.featured { border-color: var(--gold); box-shadow: 0 0 0 1px rgba(245, 185, 66, 0.4); }
.price-card .pc-badge {
    position: absolute; top: -13px; left: 50%; transform: translateX(-50%);
    font-size: 12px; font-weight: 700; color: #241400;
    background: linear-gradient(135deg, var(--gold), #e89b1c);
    padding: 5px 15px; border-radius: 999px;
    white-space: nowrap;
}
.price-card .pc-ic { width: 52px; height: 52px; border-radius: 14px; display: grid; place-items: center; font-size: 26px; background: rgba(42, 171, 238, 0.12); border: 1px solid rgba(42, 171, 238, 0.22); margin-bottom: 18px; }
.price-card.gold .pc-ic { background: rgba(245, 185, 66, 0.12); border-color: rgba(245, 185, 66, 0.26); }
.price-card h3 { font-size: 20px; font-weight: 780; }
.price-card .pc-desc { font-size: 14px; color: var(--text-2); margin: 8px 0 20px; }
.price-card ul { display: flex; flex-direction: column; gap: 10px; margin-bottom: 26px; flex: 1; }
.price-card ul li { display: flex; align-items: flex-start; gap: 9px; font-size: 14px; color: var(--text-2); }
.price-card ul li .tick { color: var(--green); font-weight: 700; flex: none; margin-top: 1px; }
.price-card .btn { width: 100%; }

/* ============ 一手货源 ============ */
.supply { background: var(--bg); }
.supply-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 56px; align-items: center; }
.supply-list { display: flex; flex-direction: column; gap: 0; }
.supply-item { display: flex; gap: 18px; padding: 20px 0; border-bottom: 1px solid var(--border-soft); }
.supply-item:last-child { border-bottom: none; }
.supply-item .s-num {
    flex: none;
    width: 44px; height: 44px; border-radius: 12px;
    display: grid; place-items: center;
    font-size: 18px; font-weight: 800; color: var(--gold-2);
    background: rgba(245, 185, 66, 0.1);
    border: 1px solid rgba(245, 185, 66, 0.28);
}
.supply-item h4 { font-size: 17px; font-weight: 750; margin-bottom: 5px; }
.supply-item p { font-size: 14.5px; color: var(--text-2); }

.supply-visual { position: relative; }
.supply-card {
    background: linear-gradient(160deg, var(--surface-2), var(--surface));
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 30px;
    box-shadow: var(--shadow);
}
.supply-card .sc-head { display: flex; align-items: center; gap: 12px; margin-bottom: 22px; }
.supply-card .sc-head .ic { width: 44px; height: 44px; border-radius: 12px; display: grid; place-items: center; font-size: 22px; background: rgba(42, 171, 238, 0.12); border: 1px solid rgba(42, 171, 238, 0.22); }
.supply-card .sc-head .t { font-weight: 750; font-size: 17px; }
.supply-card .sc-head .s { font-size: 12.5px; color: var(--muted); }
.sc-chain { display: flex; flex-direction: column; gap: 0; }
.sc-node { display: flex; align-items: center; gap: 14px; }
.sc-node .dot { width: 12px; height: 12px; border-radius: 50%; flex: none; }
.sc-node .dot.src { background: var(--gold); box-shadow: 0 0 10px var(--gold); }
.sc-node .dot.mid { background: var(--accent); box-shadow: 0 0 10px var(--accent); }
.sc-node .dot.end { background: var(--green); box-shadow: 0 0 10px var(--green); }
.sc-node .lbl { font-size: 14px; color: var(--text-2); }
.sc-node .lbl b { color: var(--text); font-weight: 700; }
.sc-line { width: 2px; height: 26px; margin-left: 5px; background: linear-gradient(var(--gold), var(--accent)); opacity: 0.5; }

/* ============ 购买流程 ============ */
.steps { background: var(--bg-2); }
.steps-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.step-card {
    position: relative;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 26px 22px;
    transition: transform 0.2s ease, border-color 0.2s ease;
}
.step-card:hover { transform: translateY(-4px); border-color: var(--accent); }
.step-card .step-num { font-size: 15px; font-weight: 800; color: var(--accent-2); letter-spacing: 0.05em; }
.step-card .step-ic { font-size: 28px; margin: 14px 0 10px; }
.step-card h4 { font-size: 17px; font-weight: 750; margin-bottom: 6px; }
.step-card p { font-size: 14px; color: var(--text-2); }
.step-card::after {
    content: "→";
    position: absolute;
    right: -15px; top: 50%;
    transform: translateY(-50%);
    font-size: 22px; color: var(--accent-2);
    opacity: 0.6;
}
.step-card:last-child::after { display: none; }

/* ============ 使用攻略 文章 ============ */
.articles { background: var(--bg); }
.article-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.article-card {
    background: linear-gradient(160deg, var(--surface-2), var(--surface));
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 26px;
    transition: transform 0.2s ease, border-color 0.2s ease;
}
.article-card:hover { transform: translateY(-4px); border-color: var(--accent); }
.article-card .a-cat { font-size: 12px; font-weight: 700; color: var(--accent-2); letter-spacing: 0.06em; margin-bottom: 12px; }
.article-card h3 { font-size: 18px; font-weight: 750; line-height: 1.4; margin-bottom: 12px; }
.article-card p { font-size: 14px; color: var(--text-2); line-height: 1.75; }
.article-card p + p { margin-top: 10px; }

/* ============ FAQ ============ */
.faq { background: var(--bg-2); }
.faq-wrap { max-width: 780px; margin: 0 auto; }
.faq-item { background: var(--surface); border: 1px solid var(--border); border-radius: 14px; margin-bottom: 12px; overflow: hidden; }
.faq-q {
    width: 100%;
    display: flex; align-items: center; justify-content: space-between; gap: 14px;
    background: none; border: none; cursor: pointer;
    padding: 20px 22px;
    font-size: 16px; font-weight: 650; color: var(--text);
    text-align: left; font-family: inherit;
}
.faq-q .faq-mark { color: var(--accent-2); font-weight: 800; margin-right: 2px; }
.faq-q .faq-icon { flex: none; width: 26px; height: 26px; border-radius: 8px; display: grid; place-items: center; background: rgba(42, 171, 238, 0.1); color: var(--accent-2); transition: transform 0.25s ease; font-size: 18px; }
.faq-item.open .faq-icon { transform: rotate(45deg); }
.faq-a { max-height: 0; overflow: hidden; transition: max-height 0.3s ease; }
.faq-a p { padding: 0 22px 20px; font-size: 14.5px; color: var(--text-2); }

/* ============ 售后保障 banner ============ */
.aftercare { background: var(--bg); }
.aftercare-banner {
    position: relative;
    border-radius: var(--radius-lg);
    padding: 52px 44px;
    text-align: center;
    overflow: hidden;
    background: linear-gradient(135deg, rgba(42, 171, 238, 0.16), rgba(245, 185, 66, 0.1));
    border: 1px solid rgba(42, 171, 238, 0.3);
}
.aftercare-banner::before {
    content: "";
    position: absolute; inset: 0;
    background-image: radial-gradient(500px 200px at 20% 10%, rgba(42, 171, 238, 0.18), transparent 60%),
        radial-gradient(400px 200px at 85% 90%, rgba(245, 185, 66, 0.14), transparent 60%);
    pointer-events: none;
}
.aftercare-banner h2 { font-size: clamp(24px, 3.6vw, 34px); font-weight: 800; letter-spacing: -0.02em; margin-bottom: 14px; position: relative; }
.aftercare-banner p { font-size: 15.5px; color: var(--text-2); max-width: 640px; margin: 0 auto 26px; position: relative; }
.aftercare-banner .ac-tags { display: flex; flex-wrap: wrap; justify-content: center; gap: 10px; margin-bottom: 28px; position: relative; }
.aftercare-banner .ac-tags span { font-size: 13px; color: var(--text-2); background: rgba(255, 255, 255, 0.05); border: 1px solid var(--border-soft); padding: 7px 14px; border-radius: 999px; }
.aftercare-banner .btn { position: relative; }

/* ============ 页脚 ============ */
.site-footer { background: #050c18; border-top: 1px solid var(--border-soft); padding: 52px 0 30px; }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1fr; gap: 32px; margin-bottom: 36px; }
.footer-brand p { font-size: 14px; color: var(--muted); margin-top: 14px; max-width: 300px; }
.footer-col h4 { font-size: 14px; font-weight: 700; color: var(--text); margin-bottom: 16px; letter-spacing: 0.03em; }
.footer-col a { display: block; font-size: 14px; color: var(--muted); padding: 6px 0; transition: color 0.15s ease; }
.footer-col a:hover { color: var(--accent-2); }
.footer-bottom { border-top: 1px solid var(--border-soft); padding-top: 22px; text-align: center; font-size: 13px; color: var(--muted); }
.footer-bottom a { color: var(--text-2); }

/* ============ 动画 ============ */
@keyframes pulse { 0% { box-shadow: 0 0 0 0 rgba(245,185,66,0.6); } 70% { box-shadow: 0 0 0 9px rgba(245,185,66,0); } 100% { box-shadow: 0 0 0 0 rgba(245,185,66,0); } }
@keyframes blink { 0%,100% { opacity: 1; } 50% { opacity: 0.35; } }
@keyframes floaty { 0%,100% { transform: translateY(0); } 50% { transform: translateY(-9px); } }

.reveal { opacity: 0; transform: translateY(26px); transition: opacity 0.6s ease, transform 0.6s ease; }
.reveal.revealed { opacity: 1; transform: translateY(0); }
.no-js .reveal { opacity: 1; transform: none; }

/* ============ 响应式 ============ */
@media (max-width: 960px) {
    .hero-grid { grid-template-columns: 1fr; gap: 40px; }
    .hero-visual { max-width: 520px; }
    .bento { grid-template-columns: repeat(2, 1fr); grid-auto-rows: auto; }
    .feature-card.tall { grid-row: span 1; }
    .feature-card.wide { grid-column: span 2; }
    .supply-grid { grid-template-columns: 1fr; gap: 40px; }
    .steps-grid { grid-template-columns: repeat(2, 1fr); }
    .step-card::after { display: none; }
    .article-grid { grid-template-columns: 1fr; }
    .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 720px) {
    section { padding: 60px 0; }
    .main-nav {
        display: none;
        position: absolute;
        top: 68px; left: 0; right: 0;
        background: rgba(8, 17, 31, 0.98);
        border-bottom: 1px solid var(--border);
        padding: 12px 5%;
    }
    .main-nav.open { display: block; }
    .main-nav ul { flex-direction: column; align-items: stretch; gap: 4px; }
    .main-nav a { display: block; padding: 12px 14px; }
    .menu-toggle { display: flex; }
    .header-cta .btn { padding: 10px 16px; font-size: 14px; }
    .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 20px; }
    .bento { grid-template-columns: 1fr; }
    .feature-card.wide { grid-column: span 1; }
    .flow { grid-template-columns: 1fr 1fr; gap: 30px 0; }
    .flow::before { display: none; }
    .price-grid { grid-template-columns: 1fr; }
    .float-chip { display: none; }
    .aftercare-banner { padding: 40px 24px; }
}

/* 无 JS 时兜底（导航仍可滚动到锚点） */
.no-js .main-nav { display: block; }