/* ============================================================
   深圳市星际联合科技有限公司 · 官网样式
   v2.0 · 2026-10-06 改版
   结构：令牌 → 基础 → 导航 → 首页 → 通用区块 → 子页 →
         二维码 → 页脚 → 响应式 → 动效
   ============================================================ */

/* ---------- 1. 设计令牌 ---------- */
:root {
    --brand-1: #4facfe;
    --brand-2: #00c6fb;
    --brand-soft: rgba(79, 172, 254, .12);
    --accent-1: #a18cd1;
    --accent-2: #fbc2eb;

    --ink: #0f172a;
    --ink-2: #1a1a2e;
    --ink-3: #16213e;

    --text: #24354d;
    --text-2: #55677d;
    --text-3: #8a9aad;
    --text-on-dark: #c9d6ea;

    --white: #ffffff;
    --bg-soft: #f5f8fc;
    --bg-soft-2: #eaf1fa;
    --line: #e2e9f2;
    --line-dark: rgba(255, 255, 255, .12);

    --ok: #10b981;
    --warn: #f59e0b;

    --radius-sm: 8px;
    --radius: 14px;
    --radius-lg: 22px;

    --shadow-sm: 0 2px 8px rgba(15, 23, 42, .06);
    --shadow: 0 8px 24px -6px rgba(15, 23, 42, .12);
    --shadow-lg: 0 20px 46px -14px rgba(15, 23, 42, .22);
    --shadow-brand: 0 10px 28px -8px rgba(79, 172, 254, .55);

    --nav-h: 72px;
    --maxw: 1160px;
    --ease: cubic-bezier(.22, .68, .36, 1);
    --transition: all .3s var(--ease);
}

/* ---------- 2. 基础 ---------- */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }

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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
                 "Hiragino Sans GB", "Microsoft YaHei", Roboto, Helvetica, Arial, sans-serif;
    font-size: 16px;
    line-height: 1.68;
    color: var(--text);
    background: var(--white);
    overflow-x: hidden;
}

a { color: inherit; text-decoration: none; transition: var(--transition); }
ul, ol { list-style: none; }
img, svg { max-width: 100%; }
img { height: auto; display: block; }
button { font: inherit; }

::selection { background: var(--brand-1); color: #fff; }

:focus-visible {
    outline: 3px solid rgba(79, 172, 254, .55);
    outline-offset: 3px;
    border-radius: 4px;
}

.container {
    max-width: var(--maxw);
    margin: 0 auto;
    padding: 0 24px;
}

.skip-link {
    position: absolute;
    left: -9999px;
    top: 0;
    z-index: 9999;
    background: var(--white);
    color: var(--ink);
    padding: 12px 20px;
    border-radius: 0 0 var(--radius-sm) 0;
    font-weight: 600;
}
.skip-link:focus { left: 0; }

/* ---------- 3. 导航 ---------- */
.navbar {
    position: fixed;
    inset: 0 0 auto;
    height: var(--nav-h);
    z-index: 1000;
    background: rgba(18, 24, 44, .72);
    backdrop-filter: blur(14px) saturate(160%);
    -webkit-backdrop-filter: blur(14px) saturate(160%);
    border-bottom: 1px solid var(--line-dark);
    transition: background .3s ease, box-shadow .3s ease;
}
.navbar.scrolled {
    background: rgba(14, 19, 36, .96);
    box-shadow: 0 6px 24px -10px rgba(0, 0, 0, .6);
}
.nav-container {
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
}
.logo { display: flex; align-items: center; gap: 10px; }
.logo-mark {
    width: 36px; height: 36px;
    border-radius: 10px;
    background: linear-gradient(135deg, var(--brand-1), var(--brand-2));
    display: grid; place-items: center;
    box-shadow: 0 6px 16px -6px rgba(79, 172, 254, .8);
    flex: none;
}
.logo-mark svg { width: 20px; height: 20px; color: var(--ink); }
.logo-text {
    font-size: 19px;
    font-weight: 700;
    color: var(--white);
    letter-spacing: .5px;
    white-space: nowrap;
}
.logo-sub {
    display: block;
    font-size: 10.5px;
    font-weight: 400;
    letter-spacing: 1.6px;
    color: var(--text-on-dark);
    text-transform: uppercase;
    line-height: 1.2;
    margin-top: 1px;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 6px;
}
.nav-links > li > a {
    display: block;
    padding: 9px 14px;
    border-radius: 999px;
    font-size: 15px;
    color: var(--text-on-dark);
    white-space: nowrap;
}
.nav-links > li > a:hover { color: var(--white); background: rgba(255, 255, 255, .08); }
.nav-links > li > a.active { color: var(--white); font-weight: 600; }

.btn-nav {
    background: linear-gradient(120deg, var(--brand-1), var(--brand-2)) !important;
    color: var(--ink) !important;
    font-weight: 700;
    padding: 9px 20px !important;
    box-shadow: var(--shadow-brand);
}
.btn-nav:hover { filter: brightness(1.06); transform: translateY(-1px); }

.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: 0;
    cursor: pointer;
    padding: 10px;
}
.mobile-menu-btn span {
    display: block;
    width: 24px; height: 2px;
    background: #fff;
    border-radius: 2px;
    transition: var(--transition);
}
.mobile-menu-btn.active span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.mobile-menu-btn.active span:nth-child(2) { opacity: 0; }
.mobile-menu-btn.active span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ---------- 4. 首页 Hero ---------- */
.hero {
    position: relative;
    min-height: 100vh;
    padding: calc(var(--nav-h) + 72px) 0 96px;
    display: flex;
    align-items: center;
    overflow: hidden;
    background:
        radial-gradient(900px 520px at 78% 18%, rgba(79, 172, 254, .22), transparent 60%),
        radial-gradient(700px 480px at 12% 92%, rgba(161, 140, 209, .18), transparent 62%),
        linear-gradient(150deg, #0d1428 0%, var(--ink-2) 46%, var(--ink-3) 100%);
    color: var(--white);
}
.hero::after {
    content: '';
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(255, 255, 255, .045) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, .045) 1px, transparent 1px);
    background-size: 62px 62px;
    mask-image: radial-gradient(circle at 50% 42%, #000 0%, transparent 76%);
    -webkit-mask-image: radial-gradient(circle at 50% 42%, #000 0%, transparent 76%);
    pointer-events: none;
}
.hero .container { position: relative; z-index: 2; }
.hero-grid {
    display: grid;
    grid-template-columns: 1.06fr .94fr;
    gap: 56px;
    align-items: center;
}

.eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 13px;
    letter-spacing: 1.2px;
    color: var(--brand-1);
    background: var(--brand-soft);
    border: 1px solid rgba(79, 172, 254, .3);
    padding: 6px 14px;
    border-radius: 999px;
    margin-bottom: 22px;
}
.eyebrow .dot {
    width: 6px; height: 6px; border-radius: 50%;
    background: var(--brand-1);
    box-shadow: 0 0 0 4px rgba(79, 172, 254, .2);
}

.hero-title {
    font-size: clamp(2.1rem, 4.4vw, 3.5rem);
    line-height: 1.22;
    font-weight: 800;
    letter-spacing: -.5px;
    margin-bottom: 20px;
}
.hero-title .grad {
    background: linear-gradient(110deg, var(--brand-1) 4%, var(--brand-2) 96%);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}
.hero-lead {
    font-size: 1.06rem;
    color: var(--text-on-dark);
    line-height: 1.85;
    max-width: 34em;
    margin-bottom: 32px;
}
.hero-buttons { display: flex; gap: 14px; flex-wrap: wrap; }

.hero-points {
    display: flex;
    flex-wrap: wrap;
    gap: 10px 26px;
    margin-top: 34px;
    font-size: .92rem;
    color: var(--text-on-dark);
}
.hero-points li { display: flex; align-items: center; gap: 8px; }
.hero-points svg { width: 16px; height: 16px; color: var(--brand-1); flex: none; }

.hero-visual { position: relative; }
.hero-visual svg { width: 100%; filter: drop-shadow(0 24px 50px rgba(0, 0, 0, .45)); }

.scroll-hint {
    position: absolute;
    left: 50%;
    bottom: 26px;
    transform: translateX(-50%);
    z-index: 2;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 6px;
    font-size: 12.5px;
    letter-spacing: 1px;
    color: rgba(201, 214, 234, .8);
    animation: floatY 2.4s ease-in-out infinite;
}
@keyframes floatY {
    0%, 100% { transform: translateX(-50%) translateY(0); }
    50% { transform: translateX(-50%) translateY(9px); }
}

/* ---------- 5. 按钮 ---------- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 13px 28px;
    border: 2px solid transparent;
    border-radius: 999px;
    font-size: 15.5px;
    font-weight: 600;
    cursor: pointer;
    white-space: nowrap;
    transition: var(--transition);
}
.btn svg { width: 18px; height: 18px; }
.btn-primary {
    background: linear-gradient(120deg, var(--brand-1), var(--brand-2));
    color: var(--ink);
    box-shadow: var(--shadow-brand);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 16px 34px -10px rgba(79, 172, 254, .75); }
.btn-outline { border-color: rgba(255, 255, 255, .55); color: var(--white); }
.btn-outline:hover { background: var(--white); border-color: var(--white); color: var(--ink); }
.btn-ghost {
    border-color: var(--line);
    background: var(--white);
    color: var(--ink);
    box-shadow: var(--shadow-sm);
}
.btn-ghost:hover { border-color: var(--brand-1); color: var(--brand-1); transform: translateY(-2px); }
.btn-lg { padding: 15px 34px; font-size: 16.5px; }
.btn-block { width: 100%; }

/* ---------- 6. 通用区块 ---------- */
.section { padding: 96px 0; }
.section--soft { background: var(--bg-soft); }
.section--tight { padding: 72px 0; }

.section-head { max-width: 720px; margin: 0 auto 54px; text-align: center; }
.section-head--left { margin-left: 0; text-align: left; }
.section-eyebrow {
    display: inline-block;
    font-size: 13px;
    font-weight: 600;
    letter-spacing: 1.6px;
    color: var(--brand-1);
    margin-bottom: 12px;
}
.section-title {
    font-size: clamp(1.6rem, 2.8vw, 2.25rem);
    font-weight: 750;
    line-height: 1.32;
    color: var(--ink);
    letter-spacing: -.3px;
    margin-bottom: 14px;
}
.section-desc { font-size: 1.02rem; color: var(--text-2); }

.grid { display: grid; gap: 24px; }
.grid-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }

/* 卡片 */
.card {
    background: var(--white);
    border: 1px solid var(--line);
    border-radius: var(--radius-lg);
    padding: 34px 30px;
    transition: var(--transition);
}
.card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); border-color: rgba(79, 172, 254, .45); }
.card-icon {
    width: 54px; height: 54px;
    border-radius: 15px;
    display: grid; place-items: center;
    margin-bottom: 20px;
    background: linear-gradient(135deg, rgba(79, 172, 254, .16), rgba(161, 140, 209, .16));
    color: var(--brand-1);
}
.card-icon svg { width: 26px; height: 26px; }
.card-title { font-size: 1.12rem; font-weight: 700; color: var(--ink); margin-bottom: 10px; }
.card-text { font-size: .95rem; color: var(--text-2); line-height: 1.78; }

/* 列表 */
.list-check { display: grid; gap: 12px; }
.list-check li {
    position: relative;
    padding-left: 30px;
    font-size: .96rem;
    color: var(--text-2);
    line-height: 1.7;
}
.list-check li::before {
    content: '';
    position: absolute;
    left: 0; top: .42em;
    width: 18px; height: 18px;
    border-radius: 50%;
    background: var(--brand-soft) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%234facfe' stroke-width='3.4' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='20 6 9 17 4 12'/%3E%3C/svg%3E") center / 11px no-repeat;
}

/* 双栏图文 */
.split {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 56px;
    align-items: center;
}
.split--reverse .split-media { order: 2; }
.split h3 { font-size: 1.45rem; font-weight: 700; color: var(--ink); margin-bottom: 16px; }
.split p { color: var(--text-2); margin-bottom: 16px; }
.split-panel {
    background: var(--white);
    border: 1px solid var(--line);
    border-radius: var(--radius-lg);
    padding: 32px;
    box-shadow: var(--shadow);
}

/* 标签 */
.tags { display: flex; flex-wrap: wrap; gap: 10px; }
.tag {
    font-size: .88rem;
    color: var(--text);
    background: var(--white);
    border: 1px solid var(--line);
    padding: 8px 16px;
    border-radius: 999px;
}
.tag--accent { color: var(--brand-1); border-color: rgba(79, 172, 254, .4); background: var(--brand-soft); }

/* 指标条 */
.metrics {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    text-align: center;
    border: 1px solid var(--line);
    border-radius: var(--radius-lg);
    background: var(--white);
    overflow: hidden;
}
.metric { padding: 30px 18px; border-right: 1px solid var(--line); }
.metric:last-child { border-right: 0; }
.metric-num {
    display: block;
    font-size: 1.85rem;
    font-weight: 800;
    color: var(--ink);
    letter-spacing: -.5px;
}
.metric-num span { font-size: 1rem; color: var(--brand-1); margin-left: 2px; }
.metric-label { display: block; font-size: .88rem; color: var(--text-3); margin-top: 6px; }

/* 步骤 */
.steps { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 20px; counter-reset: step; }
.step {
    position: relative;
    background: var(--white);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    padding: 28px 24px;
}
.step-num {
    counter-increment: step;
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--brand-1);
    opacity: .9;
    margin-bottom: 12px;
}
.step-num::before { content: '0' counter(step); }
.step h4 { font-size: 1.02rem; color: var(--ink); margin-bottom: 8px; }
.step p { font-size: .9rem; color: var(--text-2); line-height: 1.72; }

/* CTA 条 */
.cta-band {
    position: relative;
    padding: 76px 0;
    background:
        radial-gradient(700px 320px at 82% 22%, rgba(79, 172, 254, .28), transparent 62%),
        linear-gradient(130deg, #101830 0%, var(--ink-2) 55%, var(--ink-3) 100%);
    color: var(--white);
    overflow: hidden;
}
.cta-band::after {
    content: '';
    position: absolute; inset: 0;
    background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none'%3E%3Cg fill='%234facfe' fill-opacity='.06'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
    pointer-events: none;
}
.cta-inner {
    position: relative;
    z-index: 2;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 36px;
    flex-wrap: wrap;
}
.cta-band h2 { font-size: clamp(1.5rem, 2.6vw, 2.1rem); font-weight: 750; margin-bottom: 10px; }
.cta-band p { color: var(--text-on-dark); max-width: 46em; }
.cta-actions { display: flex; gap: 14px; flex-wrap: wrap; }

/* ---------- 7. 子页 ---------- */
.page-hero {
    position: relative;
    padding: calc(var(--nav-h) + 76px) 0 76px;
    background:
        radial-gradient(700px 400px at 82% 10%, rgba(79, 172, 254, .22), transparent 60%),
        linear-gradient(140deg, #0d1428 0%, var(--ink-2) 52%, var(--ink-3) 100%);
    color: var(--white);
    overflow: hidden;
}
.page-hero::after {
    content: '';
    position: absolute; inset: 0;
    background-image:
        linear-gradient(rgba(255, 255, 255, .04) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, .04) 1px, transparent 1px);
    background-size: 62px 62px;
    mask-image: linear-gradient(to bottom, #000, transparent 88%);
    -webkit-mask-image: linear-gradient(to bottom, #000, transparent 88%);
    pointer-events: none;
}
.page-hero .container { position: relative; z-index: 2; }
.page-hero h1 {
    font-size: clamp(1.85rem, 3.4vw, 2.6rem);
    font-weight: 800;
    letter-spacing: -.4px;
    margin-bottom: 14px;
}
.page-hero p { color: var(--text-on-dark); font-size: 1.05rem; max-width: 46em; }
.crumbs { font-size: .88rem; color: rgba(201, 214, 234, .75); margin-bottom: 18px; }
.crumbs a:hover { color: var(--brand-1); }
.crumbs span { margin: 0 8px; opacity: .55; }

.prose { max-width: 780px; }
.prose h3 { font-size: 1.28rem; color: var(--ink); margin: 34px 0 12px; }
.prose p { color: var(--text-2); margin-bottom: 14px; }
.prose strong { color: var(--ink); }

.lead-card {
    background: linear-gradient(135deg, rgba(79, 172, 254, .09), rgba(161, 140, 209, .09));
    border: 1px solid rgba(79, 172, 254, .26);
    border-left: 5px solid var(--brand-1);
    border-radius: var(--radius);
    padding: 28px 30px;
    font-size: 1.02rem;
    line-height: 1.9;
    color: var(--ink);
}

/* 信息行（联系我们） */
.info-list { display: grid; gap: 18px; }
.info-item { display: flex; gap: 16px; align-items: flex-start; }
.info-icon {
    width: 44px; height: 44px; flex: none;
    border-radius: 13px;
    display: grid; place-items: center;
    background: linear-gradient(135deg, rgba(79, 172, 254, .16), rgba(161, 140, 209, .16));
    color: var(--brand-1);
}
.info-icon svg { width: 21px; height: 21px; }
.info-item dt { font-size: .86rem; color: var(--text-3); margin-bottom: 2px; }
.info-item dd { font-size: 1.04rem; color: var(--ink); font-weight: 600; word-break: break-all; }
.info-item dd a:hover { color: var(--brand-1); }

/* ---------- 8. 二维码 ---------- */
.qr-card {
    background: var(--white);
    border: 1px solid var(--line);
    border-radius: var(--radius-lg);
    padding: 30px;
    text-align: center;
    box-shadow: var(--shadow-sm);
    max-width: 330px;
}
.qr-frame {
    background: var(--white);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    padding: 12px;
    display: inline-block;
    margin-bottom: 16px;
}
.qr-card img { width: 216px; height: 216px; object-fit: contain; }
.qr-card h4 { font-size: 1.05rem; color: var(--ink); margin-bottom: 6px; }
.qr-card p { font-size: .88rem; color: var(--text-2); line-height: 1.7; }
.qr-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: .8rem;
    font-weight: 600;
    color: #07c160;
    background: rgba(7, 193, 96, .1);
    border-radius: 999px;
    padding: 5px 12px;
    margin-bottom: 14px;
}
.qr-badge svg { width: 14px; height: 14px; }

.qr-modal {
    position: fixed;
    inset: 0;
    z-index: 2000;
    display: none;
    align-items: center;
    justify-content: center;
    padding: 24px;
    background: rgba(8, 14, 30, .74);
    backdrop-filter: blur(6px);
    -webkit-backdrop-filter: blur(6px);
}
.qr-modal.open { display: flex; }
.qr-dialog {
    position: relative;
    width: 100%;
    max-width: 372px;
    background: var(--white);
    border-radius: var(--radius-lg);
    padding: 36px 30px 30px;
    text-align: center;
    box-shadow: var(--shadow-lg);
    animation: dialogIn .3s var(--ease);
}
@keyframes dialogIn {
    from { opacity: 0; transform: translateY(18px) scale(.97); }
    to { opacity: 1; transform: none; }
}
.qr-close {
    position: absolute;
    top: 12px; right: 12px;
    width: 36px; height: 36px;
    border: 0;
    border-radius: 50%;
    background: var(--bg-soft);
    color: var(--text-2);
    font-size: 20px;
    line-height: 1;
    cursor: pointer;
    display: grid; place-items: center;
    transition: var(--transition);
}
.qr-close:hover { background: var(--bg-soft-2); color: var(--ink); }
.qr-dialog h3 { font-size: 1.24rem; color: var(--ink); margin-bottom: 8px; }
.qr-dialog .qr-hint { font-size: .9rem; color: var(--text-2); margin-bottom: 22px; line-height: 1.7; }
.qr-dialog img {
    width: 220px; height: 220px;
    object-fit: contain;
    margin: 0 auto 18px;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    padding: 10px;
    background: #fff;
}
.qr-dialog .qr-name {
    display: inline-block;
    font-size: .95rem;
    font-weight: 700;
    color: var(--ink);
    background: var(--bg-soft);
    border-radius: 999px;
    padding: 7px 18px;
}

/* ---------- 9. 页脚 ---------- */
.footer {
    background: #0c1222;
    color: var(--text-on-dark);
    padding: 66px 0 0;
    border-top: 1px solid var(--line-dark);
}
.footer-grid {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr 1fr;
    gap: 44px;
    padding-bottom: 46px;
    border-bottom: 1px solid var(--line-dark);
}
.footer .logo-text { font-size: 1.05rem; }
.footer-about p { font-size: .92rem; line-height: 1.8; margin: 16px 0; max-width: 30em; }
.footer-col h4 { color: var(--white); font-size: .98rem; margin-bottom: 18px; font-weight: 600; }
.footer-col li { margin-bottom: 11px; font-size: .92rem; }
.footer-col a:hover { color: var(--brand-1); }
.footer-col .muted { color: var(--text-3); }
.footer-qr {
    display: flex;
    align-items: center;
    gap: 12px;
    cursor: pointer;
    background: rgba(255, 255, 255, .05);
    border: 1px solid var(--line-dark);
    border-radius: var(--radius);
    padding: 12px;
    transition: var(--transition);
    text-align: left;
}
.footer-qr:hover { border-color: rgba(79, 172, 254, .5); background: rgba(79, 172, 254, .1); }
.footer-qr img { width: 62px; height: 62px; border-radius: 6px; background: #fff; padding: 3px; flex: none; }
.footer-qr b { display: block; color: var(--white); font-size: .92rem; }
.footer-qr small { color: var(--text-3); font-size: .78rem; line-height: 1.5; display: block; margin-top: 3px; }

.footer-bottom {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 14px;
    flex-wrap: wrap;
    padding: 22px 0 26px;
    font-size: .86rem;
    color: var(--text-3);
}
.footer-bottom a:hover { color: var(--brand-1); }
.footer-legal { display: flex; gap: 20px; flex-wrap: wrap; }

/* ---------- 10. 响应式 ---------- */
@media (max-width: 1080px) {
    .hero-grid { grid-template-columns: 1fr; gap: 44px; }
    .hero-visual { order: -1; max-width: 520px; margin: 0 auto; }
    .hero { min-height: auto; padding: calc(var(--nav-h) + 56px) 0 76px; }
    .scroll-hint { display: none; }
    .grid-4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .steps { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .footer-grid { grid-template-columns: 1fr 1fr; gap: 34px; }
}

@media (max-width: 860px) {
    .mobile-menu-btn { display: flex; }
    .nav-links {
        position: fixed;
        top: var(--nav-h);
        left: 0; right: 0;
        flex-direction: column;
        align-items: stretch;
        gap: 4px;
        padding: 16px 20px 24px;
        background: rgba(12, 18, 34, .985);
        border-bottom: 1px solid var(--line-dark);
        transform: translateY(-14px);
        opacity: 0;
        visibility: hidden;
        transition: var(--transition);
        max-height: calc(100vh - var(--nav-h));
        overflow-y: auto;
    }
    .nav-links.active { transform: none; opacity: 1; visibility: visible; }
    .nav-links > li > a { padding: 13px 16px; border-radius: var(--radius-sm); font-size: 16px; }
    .btn-nav { text-align: center; margin-top: 6px; }
    .grid-3, .grid-2 { grid-template-columns: 1fr; }
    .split { grid-template-columns: 1fr; gap: 30px; }
    .split--reverse .split-media { order: 0; }
    .metrics { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .metric:nth-child(2) { border-right: 0; }
    .metric:nth-child(-n+2) { border-bottom: 1px solid var(--line); }
    .section { padding: 68px 0; }
    .cta-inner { flex-direction: column; align-items: flex-start; }
}

@media (max-width: 560px) {
    .container { padding: 0 18px; }
    .grid-4 { grid-template-columns: 1fr; }
    .steps { grid-template-columns: 1fr; }
    .hero-buttons { flex-direction: column; align-items: stretch; }
    .btn { width: 100%; }
    .hero-buttons .btn { width: 100%; }
    .card { padding: 28px 22px; }
    .footer-grid { grid-template-columns: 1fr; gap: 30px; }
    .footer-bottom { flex-direction: column; text-align: center; }
    .qr-card { max-width: 100%; }
    .qr-card img { width: 200px; height: 200px; }
    .qr-dialog img { width: 190px; height: 190px; }
    .cta-actions { width: 100%; flex-direction: column; }
}

/* ---------- 11. 动效 ---------- */
.reveal { opacity: 0; transform: translateY(26px); transition: opacity .7s var(--ease), transform .7s var(--ease); }
.reveal.in { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
    html { scroll-behavior: auto; }
    *, *::before, *::after {
        animation-duration: .001ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: .001ms !important;
    }
    .reveal { opacity: 1; transform: none; }
}

/* 打印 */
@media print {
    .navbar, .scroll-hint, .qr-modal, .cta-band { display: none !important; }
    body { color: #000; }
}