/* ==========================================================
   海阁社区 · 产品介绍落地页
   主题色取自 App Logo：品牌红 + 白
   ========================================================== */

:root {
    --primary: #e60f1e;
    --primary-600: #c70a18;
    --primary-700: #a60814;
    --primary-300: #ff5a68;
    --primary-100: #ffe8ea;
    --primary-50: #fff4f5;
    --amber: #ffb020;
    --ink: #211a1d;
    --ink-2: #5b5258;
    --ink-3: #8e848a;
    --bg: #fffdfd;
    --white: #ffffff;
    --radius: 18px;
    --radius-lg: 26px;
    --shadow: 0 18px 45px -18px rgba(198, 10, 24, .28);
    --shadow-soft: 0 12px 32px -14px rgba(33, 26, 29, .14);
    --header-h: 72px;
    --ease: cubic-bezier(.22, .9, .3, 1);
}

* { 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", "Helvetica Neue", Helvetica, Arial, sans-serif;
    color: var(--ink);
    background: var(--bg);
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
}

img { max-width: 100%; display: block; }
a { text-decoration: none; color: inherit; }
ul { list-style: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }

.container {
    width: min(1180px, 92%);
    margin: 0 auto;
}

section[id] { scroll-margin-top: calc(var(--header-h) + 16px); }

/* ---------- 通用按钮 ---------- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    border-radius: 999px;
    font-weight: 700;
    white-space: nowrap;
    transition: transform .25s var(--ease), box-shadow .25s var(--ease),
        background .25s var(--ease), color .25s var(--ease);
}
.btn:active { transform: scale(.97); }

.btn-mini {
    padding: 9px 22px;
    font-size: 14px;
    color: var(--white);
    background: linear-gradient(135deg, var(--primary), var(--primary-600));
    box-shadow: 0 8px 20px -8px rgba(198, 10, 24, .65);
}
.btn-mini:hover { transform: translateY(-2px); box-shadow: 0 12px 24px -8px rgba(198, 10, 24, .7); }

.btn-lg { padding: 15px 38px; font-size: 16px; }
.btn-md { padding: 12px 30px; font-size: 15px; }

.btn-primary {
    color: var(--white);
    background: linear-gradient(135deg, var(--primary), var(--primary-600));
    box-shadow: 0 14px 30px -12px rgba(198, 10, 24, .65);
}
.btn-primary:hover { transform: translateY(-3px); box-shadow: 0 20px 38px -12px rgba(198, 10, 24, .7); }

.btn-light {
    color: var(--primary-600);
    background: var(--white);
    box-shadow: 0 16px 34px -12px rgba(0, 0, 0, .35);
}
.btn-light:hover { transform: translateY(-3px); box-shadow: 0 22px 42px -12px rgba(0, 0, 0, .42); }

.btn-outline-light {
    color: var(--white);
    border: 1.5px solid rgba(255, 255, 255, .55);
    background: rgba(255, 255, 255, .08);
    backdrop-filter: blur(6px);
}
.btn-outline-light:hover { background: rgba(255, 255, 255, .2); transform: translateY(-3px); }

/* ---------- 顶部导航 ---------- */
.site-header {
    position: fixed;
    top: 0; left: 0; right: 0;
    z-index: 100;
    height: var(--header-h);
    background: rgba(255, 255, 255, .82);
    backdrop-filter: saturate(180%) blur(14px);
    -webkit-backdrop-filter: saturate(180%) blur(14px);
    border-bottom: 1px solid transparent;
    transition: box-shadow .3s var(--ease), border-color .3s var(--ease), background .3s var(--ease);
}
.site-header.scrolled {
    border-bottom-color: rgba(198, 10, 24, .08);
    box-shadow: 0 10px 30px -16px rgba(198, 10, 24, .25);
}

.nav-bar {
    height: var(--header-h);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.brand { display: flex; align-items: center; gap: 12px; }

/* Logo 占位：src 留空时呈现品牌红色圆角方块，换上真实 logo 图片后自动覆盖 */
.brand-logo {
    width: 42px; height: 42px;
    border-radius: 12px;
    object-fit: cover;
    background:
        radial-gradient(circle at 32% 28%, #ff5b68 0%, var(--primary) 46%, var(--primary-700) 100%);
    box-shadow: 0 8px 18px -8px rgba(198, 10, 24, .75);
    color: transparent;
    overflow: hidden;
}

.brand-name { font-size: 20px; font-weight: 800; letter-spacing: 1px; }
.brand-name::first-letter { color: var(--primary); }

.nav-links { display: flex; align-items: center; gap: 6px; }
.nav-link {
    padding: 8px 16px;
    font-size: 15px;
    font-weight: 600;
    color: var(--ink-2);
    border-radius: 999px;
    transition: color .25s, background .25s;
}
.nav-link:hover { color: var(--primary); }
.nav-link.active { color: var(--primary); background: var(--primary-50); }
.nav-links .btn-mini { margin-left: 10px; }

.nav-toggle {
    display: none;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    width: 42px; height: 42px;
    border-radius: 10px;
}
.nav-toggle span {
    display: block;
    width: 22px; height: 2px;
    margin: 0 auto;
    background: var(--ink);
    border-radius: 2px;
    transition: transform .3s var(--ease), opacity .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); }

/* ---------- 首屏 Hero ---------- */
.hero {
    position: relative;
    padding: calc(var(--header-h) + 70px) 0 90px;
    color: var(--white);
    background:
        radial-gradient(820px 520px at 82% -8%, rgba(255, 90, 104, .42), transparent 62%),
        radial-gradient(680px 520px at -8% 108%, rgba(255, 77, 79, .3), transparent 58%),
        linear-gradient(135deg, #dd0f1e 0%, #bf0816 52%, #93060f 100%);
    overflow: hidden;
}

.hero-blob {
    position: absolute;
    border-radius: 50%;
    filter: blur(6px);
    opacity: .55;
    pointer-events: none;
}
.blob-1 {
    width: 340px; height: 340px;
    right: -110px; top: 120px;
    background: radial-gradient(circle, rgba(255,255,255,.18), transparent 70%);
    animation: drift 14s ease-in-out infinite alternate;
}
.blob-2 {
    width: 240px; height: 240px;
    left: 42%; top: -90px;
    background: radial-gradient(circle, rgba(255,176,32,.16), transparent 70%);
    animation: drift 18s ease-in-out infinite alternate-reverse;
}
.blob-3 {
    width: 190px; height: 190px;
    left: -70px; bottom: 60px;
    background: radial-gradient(circle, rgba(255,255,255,.14), transparent 70%);
    animation: drift 16s ease-in-out infinite alternate;
}
@keyframes drift {
    from { transform: translate3d(0, 0, 0) scale(1); }
    to   { transform: translate3d(26px, -28px, 0) scale(1.12); }
}

.hero-inner {
    position: relative;
    z-index: 2;
    display: grid;
    grid-template-columns: minmax(0, 1.08fr) minmax(0, .92fr);
    gap: 40px;
    align-items: center;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 7px 18px;
    font-size: 13.5px;
    font-weight: 600;
    letter-spacing: .5px;
    border-radius: 999px;
    background: rgba(255, 255, 255, .13);
    border: 1px solid rgba(255, 255, 255, .28);
    backdrop-filter: blur(6px);
}
.hero-badge .dot {
    width: 8px; height: 8px;
    border-radius: 50%;
    background: #ffd34d;
    box-shadow: 0 0 0 4px rgba(255, 211, 77, .25);
    animation: pulse-dot 2s infinite;
}
@keyframes pulse-dot {
    0%, 100% { box-shadow: 0 0 0 3px rgba(255, 211, 77, .25); }
    50% { box-shadow: 0 0 0 7px rgba(255, 211, 77, .06); }
}

.hero-title {
    margin-top: 20px;
    font-size: clamp(42px, 6vw, 64px);
    font-weight: 900;
    line-height: 1.1;
    letter-spacing: 4px;
    text-shadow: 0 6px 26px rgba(0, 0, 0, .22);
}

.hero-sub {
    margin-top: 12px;
    font-size: clamp(17px, 2.4vw, 22px);
    font-weight: 600;
    color: rgba(255, 255, 255, .94);
    letter-spacing: 1px;
}

.hero-desc {
    margin-top: 20px;
    font-size: 15.5px;
    color: rgba(255, 255, 255, .86);
    max-width: 560px;
}

.hero-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-top: 28px;
}
.meta-chip {
    display: flex;
    flex-direction: column;
    gap: 2px;
    padding: 10px 18px;
    min-width: 108px;
    border-radius: 14px;
    background: rgba(255, 255, 255, .12);
    border: 1px solid rgba(255, 255, 255, .24);
    backdrop-filter: blur(8px);
}
.meta-label { font-size: 12px; color: rgba(255, 255, 255, .72); }
.meta-value { font-size: 16px; font-weight: 800; color: #fff; }

.hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
    margin-top: 34px;
}
.hero-note {
    margin-top: 18px;
    font-size: 13px;
    color: rgba(255, 255, 255, .68);
    letter-spacing: .5px;
}

/* ----- 首屏截图叠加效果 ----- */
.hero-shots {
    position: relative;
    height: 540px;
    margin: 0 auto;
    width: 100%;
    max-width: 440px;
}

.phone {
    position: absolute;
    top: 10px;
    width: 238px;
    cursor: pointer;
    outline: none;
    transition: transform .5s var(--ease), opacity .45s var(--ease), filter .45s var(--ease);
}
.phone-1 { left: 0;  z-index: 1; transform: rotate(-9deg) translateY(22px); }
.phone-2 { left: 50%; margin-left: -119px; z-index: 2; transform: rotate(0deg) translateY(10px); }
.phone-3 { right: 0; z-index: 1; transform: rotate(9deg) translateY(22px); }

/* 非激活的后置截图 */
.phone.is-back { opacity: .5; filter: saturate(.55) brightness(.92); }

/* 当前查看的截图：居中前置放大回正 */
.phone.is-active {
    z-index: 6;
    transform: translateY(-14px) scale(1.06) rotate(0deg) !important;
}
.phone.is-active .phone-inner { animation: float 4.6s ease-in-out infinite; }
.phone.is-back .phone-inner { animation: none; }

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}

.phone-inner { transition: filter .4s; }

.phone-frame {
    position: relative;
    padding: 9px;
    border-radius: 36px;
    background: linear-gradient(160deg, #33262b, #171014);
    box-shadow:
        0 40px 70px -24px rgba(0, 0, 0, .55),
        inset 0 0 0 2px rgba(255, 255, 255, .08);
}
.phone-notch {
    position: absolute;
    top: 9px; left: 50%;
    transform: translateX(-50%);
    width: 92px; height: 20px;
    background: #171014;
    border-radius: 0 0 14px 14px;
    z-index: 2;
}
.phone-screen {
    border-radius: 28px;
    overflow: hidden;
    background: var(--primary-50);
    aspect-ratio: 9 / 18.4;
}

/* 截图占位：src 留空时显示淡红底 + alt 说明文字，替换图片后自动覆盖 */
.phone-screen img {
    width: 100%; height: 100%;
    object-fit: cover;
    background:
        linear-gradient(160deg, #fff 10%, var(--primary-100) 90%);
    color: var(--primary-600);
    font-size: 12.5px;
    font-weight: 700;
    text-align: center;
    line-height: 2;
    padding: 0 14px;
}

.phone-cap {
    position: absolute;
    left: 50%;
    bottom: -14px;
    transform: translateX(-50%);
    padding: 7px 18px;
    font-size: 13px;
    font-weight: 700;
    color: var(--primary-700);
    white-space: nowrap;
    background: #fff;
    border-radius: 999px;
    box-shadow: 0 12px 26px -10px rgba(0, 0, 0, .35);
}

.shots-tip {
    position: absolute;
    bottom: -8px; left: 0; right: 0;
    text-align: center;
    font-size: 12.5px;
    color: rgba(255, 255, 255, .72);
}

/* ----- 首屏数据条 ----- */
.stat-bar {
    position: relative;
    z-index: 2;
    margin-top: 76px;
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    border-radius: var(--radius-lg);
    background: rgba(255, 255, 255, .1);
    border: 1px solid rgba(255, 255, 255, .22);
    backdrop-filter: blur(10px);
    overflow: hidden;
}
.stat-bar li {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
    padding: 24px 10px;
}
.stat-bar li + li { border-left: 1px solid rgba(255, 255, 255, .16); }
.stat-bar strong { font-size: 26px; font-weight: 900; line-height: 1.2; }
.stat-bar span { font-size: 13.5px; color: rgba(255, 255, 255, .75); }

/* ---------- 通用区块标题 ---------- */
.section { padding: 100px 0; }

.section-head { text-align: center; max-width: 680px; margin: 0 auto 60px; }
.section-tag {
    display: inline-block;
    padding: 5px 16px;
    font-size: 12px;
    font-weight: 800;
    letter-spacing: 3px;
    color: var(--primary);
    background: var(--primary-50);
    border: 1px solid var(--primary-100);
    border-radius: 999px;
}
.section-tag.light { color: #fff; background: rgba(255, 255, 255, .14); border-color: rgba(255, 255, 255, .3); }
.section-title {
    margin-top: 16px;
    font-size: clamp(28px, 4vw, 40px);
    font-weight: 900;
    letter-spacing: 2px;
}
.section-title::after {
    content: "";
    display: block;
    width: 56px; height: 4px;
    margin: 16px auto 0;
    border-radius: 4px;
    background: linear-gradient(90deg, var(--primary), var(--primary-300));
}
.section-title.light { color: #fff; }
.section-desc { margin-top: 16px; font-size: 16px; color: var(--ink-2); }
.section-desc.light { color: rgba(255, 255, 255, .82); }

/* ---------- 功能特色 ---------- */
.section-features { background: var(--bg); }

.feature-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 26px;
}
.feature-card {
    padding: 34px 30px;
    background: #fff;
    border: 1px solid #f6e6e8;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-soft);
    transition: transform .35s var(--ease), box-shadow .35s var(--ease), border-color .35s;
}
.feature-card:hover {
    transform: translateY(-8px);
    border-color: rgba(230, 15, 30, .35);
    box-shadow: var(--shadow);
}
.feature-icon {
    display: grid;
    place-items: center;
    width: 54px; height: 54px;
    border-radius: 15px;
    color: var(--primary);
    background: var(--primary-50);
    transition: background .35s, color .35s, transform .35s var(--ease);
}
.feature-icon svg { width: 27px; height: 27px; }
.feature-card:hover .feature-icon {
    background: linear-gradient(135deg, var(--primary), var(--primary-600));
    color: #fff;
    transform: rotate(-6deg) scale(1.06);
}
.feature-card h3 { margin-top: 22px; font-size: 19px; font-weight: 800; }
.feature-card p { margin-top: 10px; font-size: 14.5px; color: var(--ink-2); }

/* 附加亮点 */
.bonus-grid {
    margin-top: 30px;
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 22px;
    padding: 34px;
    border-radius: var(--radius-lg);
    background: linear-gradient(135deg, var(--primary-50), #fff);
    border: 1px solid #f8e0e3;
}
.bonus-item { display: flex; gap: 12px; align-items: flex-start; }
.bonus-check {
    flex: none;
    display: grid;
    place-items: center;
    width: 26px; height: 26px;
    border-radius: 50%;
    font-size: 13px;
    font-weight: 800;
    color: #fff;
    background: linear-gradient(135deg, var(--primary), var(--primary-600));
}
.bonus-item h4 { font-size: 15px; font-weight: 800; }
.bonus-item p { margin-top: 4px; font-size: 13px; color: var(--ink-2); line-height: 1.6; }

/* ---------- 用户评价 ---------- */
.section-reviews {
    background:
        radial-gradient(900px 460px at 88% -10%, rgba(255, 90, 104, .2), transparent 60%),
        linear-gradient(135deg, #c80917 0%, #9c0610 100%);
}

.review-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 26px;
}
.review-card {
    padding: 30px 28px;
    background: rgba(255, 255, 255, .98);
    border-radius: var(--radius-lg);
    box-shadow: 0 24px 50px -22px rgba(0, 0, 0, .4);
    transition: transform .35s var(--ease), box-shadow .35s var(--ease);
}
.review-card:hover { transform: translateY(-8px); box-shadow: 0 34px 60px -22px rgba(0, 0, 0, .5); }

.review-head { display: flex; align-items: center; gap: 14px; }
.review-head h4 { font-size: 16px; font-weight: 800; }
.stars { color: var(--amber); font-size: 14px; letter-spacing: 2px; }

/* 汉字头像（不使用 img） */
.avatar {
    flex: none;
    display: grid;
    place-items: center;
    width: 50px; height: 50px;
    border-radius: 50%;
    font-size: 20px;
    font-weight: 800;
    color: #fff;
    box-shadow: inset 0 -3px 8px rgba(0, 0, 0, .14);
}
.avatar-1 { background: linear-gradient(135deg, #ff5a68, #d40d1c); }
.avatar-2 { background: linear-gradient(135deg, #ff8a3d, #e6500f); }
.avatar-3 { background: linear-gradient(135deg, #ff7a90, #d62746); }
.avatar-4 { background: linear-gradient(135deg, #ffb020, #f0740a); }
.avatar-5 { background: linear-gradient(135deg, #ff4d4f, #a60814); }
.avatar-6 { background: linear-gradient(135deg, #f75849, #b30a18); }

.review-card > p { margin-top: 18px; font-size: 14.5px; color: var(--ink-2); }
.review-card > p::before {
    content: "“";
    color: var(--primary);
    font-size: 26px;
    font-weight: 900;
    line-height: 0;
    margin-right: 2px;
    vertical-align: -4px;
}

/* ---------- 常见问题 ---------- */
.section-faq { background: var(--bg); }

.faq-layout {
    display: grid;
    grid-template-columns: .82fr 1.18fr;
    gap: 56px;
    align-items: start;
}
.faq-head { text-align: left; margin: 0; position: sticky; top: calc(var(--header-h) + 30px); }
.faq-head .section-title::after { margin-left: 0; }
.faq-cta { margin-top: 26px; }

.faq-item {
    border: 1px solid #f3e1e3;
    border-radius: 16px;
    background: #fff;
    margin-bottom: 16px;
    overflow: hidden;
    transition: border-color .3s, box-shadow .3s;
}
.faq-item.open {
    border-color: rgba(230, 15, 30, .4);
    box-shadow: var(--shadow-soft);
}
.faq-q {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    padding: 21px 24px;
    font-size: 16px;
    font-weight: 700;
    color: var(--ink);
    text-align: left;
}
.faq-icon {
    position: relative;
    flex: none;
    width: 22px; height: 22px;
}
.faq-icon::before,
.faq-icon::after {
    content: "";
    position: absolute;
    top: 50%; left: 50%;
    background: var(--primary);
    border-radius: 2px;
    transform: translate(-50%, -50%);
    transition: transform .35s var(--ease);
}
.faq-icon::before { width: 14px; height: 2px; }
.faq-icon::after { width: 2px; height: 14px; }
.faq-item.open .faq-icon::after { transform: translate(-50%, -50%) rotate(90deg); opacity: 0; }

.faq-a {
    max-height: 0;
    overflow: hidden;
    transition: max-height .45s var(--ease);
}
.faq-a p {
    padding: 0 24px 22px;
    font-size: 14.5px;
    color: var(--ink-2);
}

/* ---------- 下载区域 ---------- */
.section-download {
    background:
        radial-gradient(700px 400px at 50% 0%, rgba(255, 90, 104, .18), transparent 65%),
        var(--primary-50);
}

.download-card {
    position: relative;
    overflow: hidden;
    text-align: center;
    padding: 74px 40px 66px;
    border-radius: 32px;
    color: #fff;
    background:
        radial-gradient(600px 360px at 85% 0%, rgba(255, 90, 104, .5), transparent 60%),
        radial-gradient(500px 340px at 10% 100%, rgba(255, 176, 32, .18), transparent 60%),
        linear-gradient(135deg, #dd0f1e 0%, #b30714 60%, #8d050f 100%);
    box-shadow: 0 50px 90px -40px rgba(166, 8, 20, .65);
}
.download-glow {
    position: absolute;
    top: -160px; left: 50%;
    transform: translateX(-50%);
    width: 520px; height: 320px;
    background: radial-gradient(ellipse, rgba(255,255,255,.22), transparent 70%);
    pointer-events: none;
}

.download-logo {
    position: relative;
    width: 92px; height: 92px;
    margin: 0 auto;
    border-radius: 24px;
    object-fit: cover;
    background:
        radial-gradient(circle at 32% 28%, #ff5b68 0%, #fff 42%, #fff 100%);
    box-shadow: 0 24px 50px -16px rgba(0, 0, 0, .45);
    color: transparent;
    overflow: hidden;
}
.download-title {
    position: relative;
    margin-top: 26px;
    font-size: clamp(28px, 4vw, 40px);
    font-weight: 900;
    letter-spacing: 3px;
}
.download-sub {
    position: relative;
    margin-top: 10px;
    font-size: 16px;
    color: rgba(255, 255, 255, .88);
}

.download-meta {
    position: relative;
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 14px;
    margin-top: 30px;
}
.download-meta li {
    display: flex;
    flex-direction: column;
    gap: 2px;
    min-width: 120px;
    padding: 12px 20px;
    border-radius: 14px;
    background: rgba(255, 255, 255, .12);
    border: 1px solid rgba(255, 255, 255, .22);
    backdrop-filter: blur(6px);
}
.download-meta span { font-size: 12px; color: rgba(255, 255, 255, .72); }
.download-meta strong { font-size: 16px; font-weight: 800; }

/* 唯一真实下载按钮（href 留空，填入地址后直接跳转，JS 不拦截） */
.btn-download {
    position: relative;
    display: inline-flex;
    align-items: center;
    gap: 12px;
    margin-top: 42px;
    padding: 21px 64px;
    font-size: 19px;
    font-weight: 900;
    letter-spacing: 2px;
    color: var(--primary-600);
    background: #fff;
    border-radius: 999px;
    box-shadow: 0 24px 50px -14px rgba(0, 0, 0, .4);
    transition: transform .3s var(--ease), box-shadow .3s var(--ease);
    animation: btn-pulse 2.4s infinite;
}
.btn-download svg { width: 24px; height: 24px; }
.btn-download:hover {
    transform: translateY(-4px) scale(1.03);
    box-shadow: 0 32px 60px -14px rgba(0, 0, 0, .48);
    animation-play-state: paused;
}
.btn-download:active { transform: translateY(-1px) scale(1); }

@keyframes btn-pulse {
    0% { box-shadow: 0 24px 50px -14px rgba(0, 0, 0, .4), 0 0 0 0 rgba(255, 255, 255, .45); }
    70% { box-shadow: 0 24px 50px -14px rgba(0, 0, 0, .4), 0 0 0 22px rgba(255, 255, 255, 0); }
    100% { box-shadow: 0 24px 50px -14px rgba(0, 0, 0, .4), 0 0 0 0 rgba(255, 255, 255, 0); }
}

.download-note {
    position: relative;
    margin-top: 24px;
    font-size: 13px;
    color: rgba(255, 255, 255, .7);
}

/* ---------- 页脚 ---------- */
.site-footer {
    background: #1a1215;
    color: rgba(255, 255, 255, .75);
    padding: 54px 0 28px;
}
.footer-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 30px;
    flex-wrap: wrap;
}
.footer-brand { display: flex; align-items: center; gap: 14px; }
.footer-logo {
    width: 48px; height: 48px;
    border-radius: 13px;
    object-fit: cover;
    background:
        radial-gradient(circle at 32% 28%, #ff5b68 0%, var(--primary) 46%, var(--primary-700) 100%);
    color: transparent;
    overflow: hidden;
}
.footer-name { font-size: 18px; font-weight: 800; color: #fff; }
.footer-slogan { font-size: 13px; color: rgba(255, 255, 255, .5); }

.footer-nav { display: flex; flex-wrap: wrap; gap: 8px; }
.footer-nav a {
    padding: 7px 16px;
    font-size: 14px;
    border-radius: 999px;
    transition: color .25s, background .25s;
}
.footer-nav a:hover { color: #fff; background: rgba(255, 255, 255, .08); }

.footer-bottom {
    margin-top: 34px;
    padding-top: 22px;
    border-top: 1px solid rgba(255, 255, 255, .08);
    display: flex;
    justify-content: space-between;
    gap: 12px;
    flex-wrap: wrap;
    font-size: 12.5px;
    color: rgba(255, 255, 255, .4);
}

/* ---------- 滚动显现动画 ---------- */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity .7s var(--ease), transform .7s var(--ease);
}
.reveal.in { opacity: 1; transform: translateY(0); }

/* ==========================================================
   自适应
   ========================================================== */
@media (max-width: 1024px) {
    .hero-inner { grid-template-columns: 1fr; gap: 70px; }
    .hero-text { text-align: center; }
    .hero-desc { margin-left: auto; margin-right: auto; }
    .hero-meta, .hero-actions { justify-content: center; }
    .hero-shots { max-width: 420px; height: 520px; }

    .feature-grid { grid-template-columns: repeat(2, 1fr); }
    .bonus-grid { grid-template-columns: repeat(2, 1fr); }
    .review-grid { grid-template-columns: repeat(2, 1fr); }
    .faq-layout { grid-template-columns: 1fr; gap: 40px; }
    .faq-head { position: static; text-align: center; }
    .faq-head .section-title::after { margin: 16px auto 0; }
}

@media (max-width: 768px) {
    .section { padding: 72px 0; }
    .hero { padding: calc(var(--header-h) + 44px) 0 70px; }

    /* 移动端导航抽屉 */
    .nav-toggle { display: flex; }
    .nav-links {
        position: fixed;
        top: var(--header-h);
        left: 0; right: 0;
        flex-direction: column;
        align-items: stretch;
        gap: 4px;
        padding: 18px 6% 26px;
        background: rgba(255, 255, 255, .97);
        backdrop-filter: blur(16px);
        border-bottom: 1px solid rgba(198, 10, 24, .1);
        box-shadow: 0 24px 40px -20px rgba(198, 10, 24, .3);
        transform: translateY(-12px);
        opacity: 0;
        visibility: hidden;
        transition: transform .3s var(--ease), opacity .3s, visibility .3s;
    }
    .nav-links.open { transform: translateY(0); opacity: 1; visibility: visible; }
    .nav-link { padding: 13px 16px; font-size: 16px; }
    .nav-links .btn-mini { margin: 10px 0 0; padding: 13px; font-size: 16px; }

    .stat-bar { grid-template-columns: repeat(2, 1fr); margin-top: 54px; }
    .stat-bar li:nth-child(3) { border-left: none; border-top: 1px solid rgba(255,255,255,.16); }
    .stat-bar li:nth-child(4) { border-top: 1px solid rgba(255,255,255,.16); }
    .stat-bar li:nth-child(-n+2) { padding-bottom: 18px; }
    .stat-bar li:nth-child(n+3) { padding-top: 18px; }

    .hero-shots { height: 430px; max-width: 340px; }
    .phone { width: 190px; }
    .phone-2 { margin-left: -95px; }
    .phone-1 { transform: rotate(-10deg) translateY(18px); }
    .phone-3 { transform: rotate(10deg) translateY(18px); }

    .feature-grid { grid-template-columns: 1fr; gap: 18px; }
    .bonus-grid { grid-template-columns: 1fr; padding: 26px; gap: 18px; }
    .review-grid { grid-template-columns: 1fr; }
    .download-card { padding: 56px 22px 50px; }
    .btn-download { padding: 18px 44px; font-size: 17px; }
    .download-meta li { min-width: calc(50% - 8px); }
}

@media (max-width: 480px) {
    .hero-meta { gap: 10px; }
    .meta-chip { min-width: calc(50% - 5px); padding: 9px 14px; }
    .hero-actions .btn { width: 100%; }
    .hero-shots { height: 380px; max-width: 300px; }
    .phone { width: 168px; }
    .phone-2 { margin-left: -84px; }
    .shots-tip { font-size: 11.5px; bottom: -4px; }
    .faq-q { padding: 18px 18px; font-size: 15px; }
    .faq-a p { padding: 0 18px 18px; }
    .footer-inner { flex-direction: column; align-items: flex-start; }
    .footer-bottom { flex-direction: column; }
}

/* 减少动效偏好 */
@media (prefers-reduced-motion: reduce) {
    html { scroll-behavior: auto; }
    *, *::before, *::after {
        animation-duration: .01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: .01ms !important;
    }
    .reveal { opacity: 1; transform: none; }
}