/* =============================================
   全局变量与重置
============================================= */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary:        #ff5722;
    --primary-dark:   #e64a19;
    --primary-light:  #fff3f0;
    --text-dark:      #1a1a2e;
    --text-body:      #4a4a6a;
    --text-muted:     #9999bb;
    --bg-white:       #ffffff;
    --bg-gray:        #f5f6fa;
    --border:         #e8e8f0;
    --shadow-sm:      0 2px 8px rgba(0,0,0,.06);
    --shadow-md:      0 6px 20px rgba(0,0,0,.08);
    --shadow-lg:      0 16px 40px rgba(0,0,0,.10);
    --radius-sm:      8px;
    --radius-md:      14px;
    --radius-lg:      24px;
}

html {
    scroll-behavior: smooth;
    /* 固定导航栏占位（栏高可能随 Logo 折行略增，略留余量） */
    scroll-padding-top: 96px;
}

body {
    font-family: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
    font-size: 16px;
    line-height: 1.7;
    color: var(--text-body);
    background: var(--bg-white);
    -webkit-font-smoothing: antialiased;
}

.container {
    max-width: 1160px;
    margin: 0 auto;
    padding: 0 24px;
}

a { text-decoration: none; }

/* =============================================
   导航栏 — 纯白 + 右侧下载按钮（美团/拼多多式）
============================================= */
.navbar {
    position: fixed;
    top: 0; left: 0; right: 0;
    background: #fff;
    border-bottom: 1px solid var(--border);
    z-index: 1000;
    min-height: 64px;
    height: auto;
    padding: 6px 0;
    display: flex;
    align-items: center;
    box-sizing: border-box;
}

.nav-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
}

.logo {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 1.35rem;
    font-weight: 700;
    color: var(--primary);
    text-decoration: none;
    flex-shrink: 1;
    min-width: 0;
    max-width: min(40vw, 22rem);
}

.logo-icon {
    font-size: 1.75rem;
    flex-shrink: 0;
}

.logo-text {
    font-size: clamp(0.7rem, 1.8vw, 0.88rem);
    font-weight: 700;
    line-height: 1.25;
    letter-spacing: -0.02em;
    color: var(--primary);
    word-break: keep-all;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 0 2px;
    margin: 0;
    padding: 0;
}

.nav-links a {
    display: flex;
    align-items: center;
    padding: 10px 10px;
    font-size: 0.82rem;
    font-weight: 500;
    color: var(--text-dark);
    transition: color .2s;
    line-height: 1.3;
    white-space: nowrap;
}

.nav-links a:hover { color: var(--primary); }

.nav-download-btn {
    background: var(--primary);
    color: #fff !important;
    border-radius: 999px;
    padding: 0 20px !important;
    line-height: 36px !important;
    font-size: 0.875rem !important;
    font-weight: 600 !important;
    margin-left: 8px;
    transition: background .2s, transform .2s !important;
    display: inline-block;
    align-self: center;
    flex-shrink: 0;
}

.nav-download-btn:hover {
    background: var(--primary-dark) !important;
    color: #fff !important;
    transform: translateY(-1px);
}

/* =============================================
   按钮系统
============================================= */
.btn {
    display: inline-block;
    padding: 13px 32px;
    border-radius: 999px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    border: none;
    transition: all .25s ease;
    text-align: center;
    text-decoration: none;
    white-space: nowrap;
}

.btn-primary {
    background: var(--primary);
    color: #fff;
    box-shadow: 0 6px 20px rgba(255,87,34,.3);
}
.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 10px 28px rgba(255,87,34,.38);
}

.btn-secondary {
    background: #fff;
    color: var(--primary);
    border: 1.5px solid var(--primary);
}
.btn-secondary:hover {
    background: var(--primary-light);
    transform: translateY(-2px);
}

.btn-lg {
    padding: 16px 44px;
    font-size: 1.05rem;
}

/* =============================================
   Hero — 白底大字，手机 mockup 右侧
============================================= */
.hero {
    padding: 120px 0 40px;
    background: var(--bg-white);
    min-height: 0;
    display: flex;
    align-items: flex-start;
    position: relative;
    overflow: hidden;
}

/* 右上角淡橙装饰圆 */
.hero::before {
    content: '';
    position: absolute;
    right: -120px; top: -80px;
    width: 520px; height: 520px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(255,87,34,.07) 0%, transparent 70%);
    pointer-events: none;
}

.hero-grid {
    display: flex;
    align-items: center;
    gap: 3rem;
    position: relative;
}

.hero-content { flex: 1; }

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: var(--primary-light);
    color: var(--primary);
    border-radius: 999px;
    padding: 6px 14px;
    font-size: 0.82rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
    letter-spacing: .02em;
}

.hero-title {
    font-size: 2.6rem;
    font-weight: 800;
    line-height: 1.28;
    color: var(--text-dark);
    margin-bottom: 1.25rem;
    letter-spacing: -.01em;
}

.hero-title em {
    font-style: normal;
    color: var(--primary);
}

.hero-desc {
    font-size: 1.05rem;
    color: var(--text-body);
    line-height: 1.8;
    margin-bottom: 0.75rem;
    max-width: 520px;
}

.hero-sub {
    font-size: 0.9rem;
    color: var(--text-muted);
    margin-bottom: 1.5rem;
    max-width: 520px;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

/* 手机 Mockup */
.hero-image {
    flex: 0 0 auto;
    display: flex;
    justify-content: center;
}

.phone-mockup-wrap { margin: 0; position: relative; }

.phone-mockup {
    width: 268px;
    height: 540px;
    background: #1a1a2e;
    border-radius: 44px;
    padding: 10px;
    box-shadow:
        0 0 0 1px rgba(255,255,255,.08),
        0 32px 80px rgba(26,26,46,.35),
        0 8px 24px rgba(26,26,46,.2);
    position: relative;
    z-index: 1;
}

/* 光晕装饰 */
.phone-mockup-wrap::before {
    content: '';
    position: absolute;
    width: 320px; height: 320px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(255,87,34,.18) 0%, transparent 70%);
    left: 50%; bottom: -60px;
    transform: translateX(-50%);
    z-index: 0;
}

.phone-screen {
    width: 100%;
    height: 100%;
    background: #1a1a24;
    border-radius: 36px;
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

/* Hero 内 APP 截图轮播 */
.hero-carousel {
    position: relative;
    width: 100%;
    height: 100%;
    min-height: 0;
}

.hero-carousel--empty {
    background: linear-gradient(160deg, #2a2a3a 0%, #1a1a24 100%);
}

.hero-carousel-viewport {
    position: relative;
    width: 100%;
    height: 100%;
    overflow: hidden;
}

.hero-carousel-track {
    display: flex;
    height: 100%;
    width: 100%;
    transition: transform 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

@media (prefers-reduced-motion: reduce) {
    .hero-carousel-track { transition: none; }
}

.hero-carousel-slide {
    flex: 0 0 100%;
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    background: #e8e8ee;
}

.hero-carousel-slide img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    object-position: center center;
    display: block;
    user-select: none;
    -webkit-user-drag: none;
}

.hero-carousel-nav {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 32px;
    height: 44px;
    border: none;
    border-radius: 8px;
    background: rgba(0, 0, 0, 0.35);
    color: #fff;
    font-size: 1.35rem;
    line-height: 1;
    cursor: pointer;
    z-index: 2;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0;
    transition: background 0.2s;
}

.hero-carousel-nav:hover {
    background: rgba(0, 0, 0, 0.5);
}

.hero-carousel-nav--prev { left: 6px; }
.hero-carousel-nav--next { right: 6px; }

.hero-carousel-dots {
    position: absolute;
    left: 0;
    right: 0;
    bottom: 10px;
    display: flex;
    justify-content: center;
    gap: 6px;
    z-index: 2;
    pointer-events: auto;
}

.hero-carousel-dot {
    width: 7px;
    height: 7px;
    border-radius: 50%;
    border: none;
    padding: 0;
    background: rgba(0, 0, 0, 0.22);
    box-shadow: 0 0 0 1px rgba(255, 255, 255, 0.5);
    cursor: pointer;
    transition: transform 0.2s, background 0.2s;
}

.hero-carousel-dot.is-active {
    background: var(--primary);
    box-shadow: 0 0 0 1px rgba(255, 255, 255, 0.6);
    transform: scale(1.15);
}

.mockup-caption {
    text-align: center;
    font-size: 0.78rem;
    color: var(--text-muted);
    margin-top: 10px;
    margin-bottom: 0;
    position: relative;
    z-index: 1;
}

/* ===== 区域招商（Hero 与核心能力之间）===== */
#agency {
    scroll-margin-top: 96px;
}

.agency-band {
    padding: 12px 0 36px;
    background: var(--bg-white);
    border-top: 1px solid var(--border);
}

.agency-card {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 1.25rem 1.75rem;
    padding: 20px 24px;
    background: var(--bg-gray);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
}

.agency-card-text {
    flex: 1 1 320px;
    min-width: 0;
}

.agency-tag {
    display: inline-block;
    font-size: 0.72rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--primary);
    margin-bottom: 8px;
}

.agency-card h2 {
    font-size: 1.35rem;
    font-weight: 800;
    color: var(--text-dark);
    line-height: 1.3;
    margin-bottom: 12px;
}

.agency-lead {
    font-size: 0.9375rem;
    color: var(--text-body);
    line-height: 1.85;
    margin-bottom: 10px;
}

.agency-note {
    font-size: 0.875rem;
    color: var(--text-muted);
    line-height: 1.75;
    margin: 0;
}

.agency-card-actions {
    flex: 0 0 auto;
    display: flex;
    flex-direction: column;
    gap: 10px;
    min-width: 200px;
}

.agency-card-actions .btn {
    text-align: center;
    justify-content: center;
    white-space: nowrap;
}

@media (max-width: 720px) {
    .agency-card-actions {
        flex-direction: row;
        flex-wrap: wrap;
        width: 100%;
    }

    .agency-card-actions .btn {
        flex: 1 1 auto;
        min-width: 140px;
    }
}

/* =============================================
   通用 section 头部
============================================= */
.sec { padding: 56px 0; }
.sec-gray { background: var(--bg-gray); }
.sec-white { background: var(--bg-white); }

.sec-head {
    text-align: center;
    margin-bottom: 36px;
}

.sec-head-left {
    text-align: left;
    margin-bottom: 28px;
}

.sec-label {
    display: inline-block;
    font-size: 0.78rem;
    font-weight: 700;
    letter-spacing: .1em;
    text-transform: uppercase;
    color: var(--primary);
    margin-bottom: 10px;
}

.sec-title {
    font-size: 1.75rem;
    font-weight: 800;
    color: var(--text-dark);
    line-height: 1.3;
    margin-bottom: 0.75rem;
}

.sec-lead {
    font-size: 1rem;
    color: var(--text-body);
    max-width: 640px;
    margin: 0 auto;
    line-height: 1.8;
}

.sec-head-left .sec-lead { margin: 0; }

/* =============================================
   核心功能 — 浅灰底 + 白卡片（3列）
============================================= */
.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

.feature-card {
    background: var(--bg-white);
    border-radius: var(--radius-lg);
    padding: 24px 22px;
    border: 1px solid var(--border);
    transition: transform .25s, box-shadow .25s;
    position: relative;
    overflow: hidden;
}

.feature-card::after {
    content: '';
    position: absolute;
    left: 0; top: 0;
    width: 3px; height: 0;
    background: var(--primary);
    border-radius: 0 2px 2px 0;
    transition: height .3s;
}

.feature-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); }
.feature-card:hover::after { height: 100%; }

.feature-icon {
    width: 52px; height: 52px;
    background: var(--primary-light);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.6rem;
    margin-bottom: 18px;
}

.feature-card h3 {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 10px;
}

.feature-card p {
    font-size: 0.9rem;
    color: var(--text-body);
    line-height: 1.75;
}

/* =============================================
   使用场景 — 白底，3卡片带数字角标
============================================= */
.scenario-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.scenario-card {
    background: var(--bg-white);
    border-radius: var(--radius-lg);
    padding: 24px 22px;
    border: 1px solid var(--border);
    box-shadow: var(--shadow-sm);
    transition: box-shadow .25s, transform .25s;
    position: relative;
}

.scenario-card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-4px);
}

.scenario-num {
    font-size: 2.4rem;
    font-weight: 900;
    color: var(--primary);
    line-height: 1;
    margin-bottom: 8px;
    opacity: .22;
}

.scenario-step {
    display: inline-block;
    font-size: 0.78rem;
    font-weight: 700;
    background: var(--primary-light);
    color: var(--primary);
    border-radius: 999px;
    padding: 3px 12px;
    margin-bottom: 14px;
    letter-spacing: .04em;
}

.scenario-card h3 {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 10px;
}

.scenario-card p {
    font-size: 0.9rem;
    color: var(--text-body);
    line-height: 1.75;
}

/* =============================================
   平台优势 — 浅灰底，2×2 卡片
============================================= */
.benefit-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
    max-width: 900px;
    margin: 0 auto;
}

.benefit-card {
    background: var(--bg-white);
    border-radius: var(--radius-lg);
    padding: 22px 22px 22px 20px;
    border: 1px solid var(--border);
    display: flex;
    gap: 20px;
    align-items: flex-start;
    transition: box-shadow .25s, transform .25s;
}

.benefit-card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-3px);
}

.benefit-num {
    font-size: 2rem;
    font-weight: 900;
    color: var(--primary);
    line-height: 1;
    flex-shrink: 0;
    width: 48px;
    opacity: .18;
}

.benefit-card h4 {
    font-size: 1rem;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 6px;
}

.benefit-card p {
    font-size: 0.875rem;
    color: var(--text-body);
    line-height: 1.7;
}

/* =============================================
   信任合规 — 白底，3 卡片 + 左侧橙色竖线
============================================= */
.trust-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

.trust-card {
    background: var(--bg-white);
    border-radius: var(--radius-lg);
    padding: 22px 20px;
    border-left: 4px solid var(--primary);
    border-top: 1px solid var(--border);
    border-right: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
    box-shadow: var(--shadow-sm);
}

.trust-card h3 {
    font-size: 1rem;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 10px;
}

.trust-card p {
    font-size: 0.875rem;
    color: var(--text-body);
    line-height: 1.75;
}

/* =============================================
   支付说明 — 浅灰底，文档卡片
============================================= */
.payment-doc {
    background: var(--bg-white);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border);
    max-width: 800px;
    overflow: hidden;
}

.payment-doc-header {
    background: var(--primary);
    color: #fff;
    padding: 14px 22px;
    font-size: 0.9rem;
    font-weight: 600;
    letter-spacing: .03em;
}

.payment-doc-body { padding: 22px 24px; }

.payment-doc-body h3 {
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--text-dark);
    margin: 14px 0 6px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.payment-doc-body h3::before {
    content: '';
    display: inline-block;
    width: 3px; height: 14px;
    background: var(--primary);
    border-radius: 2px;
    flex-shrink: 0;
}

.payment-doc-body h3:first-child { margin-top: 0; }

.payment-doc-body p {
    font-size: 0.875rem;
    color: var(--text-body);
    line-height: 1.85;
}

.doc-fine {
    margin-top: 14px;
    padding-top: 12px;
    border-top: 1px solid var(--border);
    font-size: 0.8rem;
    color: var(--text-muted);
}

/* =============================================
   FAQ — 浅灰底，手风琴感
============================================= */
.faq-list {
    max-width: 700px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.faq-item {
    background: var(--bg-white);
    border-radius: var(--radius-md);
    border: 1px solid var(--border);
    padding: 16px 20px;
}

.faq-item dt {
    font-weight: 700;
    font-size: 0.95rem;
    color: var(--text-dark);
    margin-bottom: 8px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.faq-item dt::before {
    content: 'Q';
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 22px; height: 22px;
    background: var(--primary);
    color: #fff;
    border-radius: 6px;
    font-size: 0.75rem;
    font-weight: 800;
    flex-shrink: 0;
}

.faq-item dd {
    font-size: 0.875rem;
    color: var(--text-body);
    line-height: 1.8;
    margin: 0;
    padding-left: 32px;
}

/* =============================================
   下载区 — 橙色渐变背景，居中
============================================= */
.download {
    padding: 48px 0;
    background: linear-gradient(135deg, #ff5722 0%, #ff8c42 100%);
    text-align: center;
    position: relative;
    overflow: hidden;
}

.download::before {
    content: '';
    position: absolute;
    width: 600px; height: 600px;
    border-radius: 50%;
    background: rgba(255,255,255,.06);
    right: -200px; top: -200px;
    pointer-events: none;
}

.download h2 {
    font-size: 2.2rem;
    font-weight: 800;
    color: #fff;
    margin-bottom: 12px;
}

.download p {
    font-size: 1rem;
    color: rgba(255,255,255,.85);
    margin-bottom: 22px;
}

.btn-dl {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    background: #fff;
    color: var(--primary);
    border-radius: 999px;
    padding: 14px 36px;
    font-size: 1rem;
    font-weight: 700;
    box-shadow: 0 8px 28px rgba(0,0,0,.18);
    transition: transform .25s, box-shadow .25s;
    text-decoration: none;
}

.btn-dl:hover {
    transform: translateY(-3px);
    box-shadow: 0 14px 40px rgba(0,0,0,.24);
}

.btn-dl-icon { font-size: 1.3rem; }

/* =============================================
   页脚
============================================= */
footer {
    background: #1a1a2e;
    color: rgba(255,255,255,.7);
    padding: 36px 0 28px;
}

.footer-content {
    display: flex;
    justify-content: flex-start;
    align-items: flex-start;
    gap: 2rem;
}

.footer-info--legal {
    flex: 0 0 300px;
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.footer-copyright {
    font-size: 0.9rem;
    font-weight: 600;
    color: rgba(255,255,255,.88);
}

.footer-address-line {
    font-size: 0.82rem;
    color: rgba(255,255,255,.55);
}

.footer-icp a {
    font-size: 0.82rem;
    color: rgba(255,255,255,.55);
    text-decoration: none;
    transition: color .2s;
}

.footer-icp a:hover { color: var(--primary); }

.footer-links {
    display: flex;
    gap: 3rem;
    margin-left: auto;
}

.link-group h4 {
    font-size: 0.875rem;
    font-weight: 700;
    color: rgba(255,255,255,.88);
    margin-bottom: 14px;
}

.link-group ul {
    list-style: none;
    margin: 0; padding: 0;
}

.link-group ul li { margin-bottom: 8px; }

.link-group ul a {
    font-size: 0.82rem;
    color: rgba(255,255,255,.55);
    text-decoration: none;
    transition: color .2s;
}

.link-group ul a:hover { color: var(--primary); }

/* =============================================
   汉堡菜单按钮
============================================= */
.nav-toggle {
    display: none;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    width: 40px;
    height: 40px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 6px;
    border-radius: 8px;
    transition: background .2s;
    flex-shrink: 0;
}

.nav-toggle:hover { background: var(--bg-gray); }

.nav-toggle span {
    display: block;
    width: 22px;
    height: 2px;
    background: var(--text-dark);
    border-radius: 2px;
    transition: transform .25s, opacity .25s;
    transform-origin: center;
}

.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); }

/* =============================================
   响应式
============================================= */
@media (max-width: 1024px) {
    .hero-title { font-size: 2.2rem; }
    .features-grid { grid-template-columns: repeat(2, 1fr); }
    .trust-grid { grid-template-columns: repeat(2, 1fr); }
    .benefit-grid { grid-template-columns: 1fr; max-width: 600px; }
}

@media (max-width: 768px) {
    /* 导航 */
    .navbar {
        min-height: 56px;
        height: auto;
        max-height: none;
        padding: 4px 0;
    }

    .logo {
        max-width: 58vw;
    }

    .logo-text {
        font-size: 0.58rem;
        line-height: 1.2;
        white-space: nowrap;
        overflow: hidden;
        text-overflow: ellipsis;
    }

    html {
        scroll-padding-top: 80px;
    }

    #agency {
        scroll-margin-top: 80px;
    }
    .nav-toggle { display: flex; }

    .nav-links {
        position: fixed;
        top: 64px; left: 0; right: 0;
        background: #fff;
        border-bottom: 1px solid var(--border);
        box-shadow: 0 8px 24px rgba(0,0,0,.1);
        flex-direction: column;
        gap: 0;
        padding: 8px 0 16px;
        display: none;
        z-index: 999;
    }

    .nav-links.nav-open { display: flex; }

    .nav-links li { width: 100%; }

    .nav-links a {
        line-height: 1;
        padding: 14px 24px;
        font-size: 0.95rem;
        display: block;
        border-bottom: 1px solid var(--bg-gray);
    }

    .nav-links li:last-child a { border-bottom: none; }

    /* Hero */
    .hero { padding: 80px 0 28px; min-height: auto; }
    .hero-grid { flex-direction: column; gap: 2rem; }
    .hero-title { font-size: 1.85rem; }
    .hero-content { text-align: center; }
    .hero-desc, .hero-sub { max-width: none; }
    .hero-buttons { justify-content: center; }
    .hero-badge { margin: 0 auto 1.25rem; }

    /* Phone mockup 缩小 */
    .phone-mockup { width: 220px; height: 420px; border-radius: 36px; }
    .phone-screen { border-radius: 28px; }
    .preview-header { padding: 14px 14px 10px; font-size: 0.88rem; }
    .preview-items { padding: 12px 10px; gap: 8px; }
    .preview-item { padding: 10px 12px; font-size: 0.8rem; }

    /* 各区块间距收窄 */
    .sec { padding: 44px 0; }
    .sec-head { margin-bottom: 26px; }
    .sec-head-left { margin-bottom: 22px; }

    /* 卡片 */
    .scenario-grid { grid-template-columns: 1fr; }
    .trust-grid { grid-template-columns: 1fr; }
    .features-grid { grid-template-columns: 1fr; }
    .benefit-grid { max-width: none; }

    /* feature 卡片横排 icon+文字 */
    .feature-card { display: flex; align-items: flex-start; gap: 16px; text-align: left; padding: 20px; }
    .feature-card::after { width: 100%; height: 3px; top: auto; bottom: 0; left: 0; }
    .feature-icon { width: 44px; height: 44px; flex-shrink: 0; margin-bottom: 0; font-size: 1.4rem; }
    .feature-card h3 { font-size: 1rem; margin-bottom: 6px; }
    .feature-card p { font-size: 0.875rem; }

    /* 支付说明 */
    .payment-doc-body { padding: 20px 18px; }

    /* 下载区 */
    .download { padding: 40px 0; }
    .download h2 { font-size: 1.6rem; }

    /* 页脚 */
    .footer-content { flex-direction: column; gap: 2rem; align-items: flex-start; }
    .footer-info--legal { flex: none; }
    .footer-links { flex-direction: row; flex-wrap: wrap; gap: 1.5rem 2.5rem; }
}

@media (max-width: 480px) {
    .container { padding: 0 16px; }
    .sec-title { font-size: 1.35rem; }
    .hero-title { font-size: 1.6rem; }
    .sec { padding: 32px 0; }
    .sec-head { margin-bottom: 20px; }
    .btn { padding: 12px 24px; font-size: 0.95rem; }
    .btn-lg { padding: 13px 28px; font-size: 0.95rem; }
    .scenario-card { padding: 22px 18px; }
    .trust-card { padding: 20px 18px; }
    .benefit-card { padding: 20px 16px; gap: 14px; }
    .feature-card { padding: 16px; }
    .payment-doc-header { padding: 14px 18px; font-size: 0.85rem; }
    .payment-doc-body { padding: 16px; }
    .payment-doc-body p { font-size: 0.85rem; }
    .download h2 { font-size: 1.4rem; }
    .footer-links { flex-direction: column; gap: 1.25rem; }
}