/* ============================================================
   asia-login-ice — 冰晶登录门户 · 设计系统
   ice-blue-white portal: 中央词标 header、雪感渐变、大圆角薄阴影
   ============================================================ */

:root {
    --bg: #eaf6fc;
    --bg-deep: #dff1fa;
    --panel: #ffffff;
    --ice-1: #7dd3fc;
    --ice-2: #38bdf8;
    --ice-3: #0ea5e9;
    --ink: #1e2a52;
    --ink-2: #3c4a76;
    --ink-3: #7b8ab0;
    --line: #d9edf8;
    --frost: #f4fbfe;
    --r-lg: 20px;
    --r-md: 14px;
    --shadow-soft: 0 12px 28px rgba(30, 42, 82, 0.07);
    --shadow-lift: 0 18px 40px rgba(30, 42, 82, 0.13);
    --maxw: 1180px;
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei",
        "Noto Sans SC", system-ui, sans-serif;
    color: var(--ink);
    background-color: var(--bg);
    background-image:
        radial-gradient(circle at 8% 4%, rgba(255, 255, 255, 0.9), transparent 42%),
        radial-gradient(circle at 94% 0%, rgba(125, 211, 252, 0.3), transparent 38%),
        radial-gradient(rgba(125, 211, 252, 0.4) 1.5px, transparent 1.8px);
    background-size: auto, auto, 26px 26px;
    line-height: 1.75;
}

img {
    display: block;
    max-width: 100%;
}

.container {
    width: min(var(--maxw), 92%);
    margin-inline: auto;
}

/* ---------- header: 中央词标 + 左右两组导航 ---------- */

.site-header {
    position: sticky;
    top: 0;
    z-index: 60;
    background: rgba(234, 246, 252, 0.88);
    -webkit-backdrop-filter: blur(10px);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(217, 237, 248, 0.9);
}

.header-inner {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr);
    align-items: center;
    min-height: 76px;
    gap: 12px;
}

.nav-zone-left {
    justify-self: start;
}

.nav-zone-right {
    justify-self: end;
}

.nav-group {
    display: flex;
    align-items: center;
    gap: 4px;
}

.nav-group a {
    display: inline-block;
    padding: 9px 14px;
    font-size: 15px;
    color: var(--ink-2);
    text-decoration: none;
    border-radius: 999px;
    white-space: nowrap;
    transition: background 0.2s ease, color 0.2s ease;
}

.nav-group a:hover {
    background: rgba(255, 255, 255, 0.9);
    color: var(--ice-3);
}

.wordmark {
    text-align: center;
    text-decoration: none;
    line-height: 1.2;
}

.wordmark-top {
    display: block;
    font-size: 26px;
    font-weight: 800;
    letter-spacing: 0.5px;
    color: var(--ink);
}

.wordmark-side {
    display: block;
    font-size: 13px;
    letter-spacing: 3px;
    color: var(--ink-3);
}

.nav-toggle {
    display: none;
    width: 44px;
    height: 44px;
    padding: 0;
    border: 1px solid var(--line);
    border-radius: 14px;
    background: var(--panel);
    cursor: pointer;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    gap: 5px;
}

.nav-toggle span {
    display: block;
    width: 20px;
    height: 2px;
    border-radius: 2px;
    background: var(--ink);
    transition: transform 0.2s ease, opacity 0.2s ease;
}

.site-header.nav-open .nav-toggle span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}

.site-header.nav-open .nav-toggle span:nth-child(2) {
    opacity: 0;
}

.site-header.nav-open .nav-toggle span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

.mobile-panel {
    display: none;
}

/* ---------- 通用板块骨架 ---------- */

.section {
    padding: 72px 0;
}

.section-soft {
    background: rgba(255, 255, 255, 0.55);
    border-block: 1px solid rgba(217, 237, 248, 0.8);
}

.sec-kicker {
    margin: 0 0 8px;
    font-size: 13px;
    font-weight: 700;
    letter-spacing: 4px;
    color: var(--ice-3);
}

.sec-title {
    margin: 0 0 14px;
    font-size: 34px;
    font-weight: 800;
    letter-spacing: 1px;
    color: var(--ink);
}

.sec-lead {
    max-width: 720px;
    margin: 0 0 34px;
    font-size: 16px;
    color: var(--ink-2);
}

/* ---------- hero：左说明 + 右设备组合图 ---------- */

.hero {
    padding: 64px 0 84px;
}

.hero-grid {
    display: grid;
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    gap: 56px;
    align-items: center;
}

.hero-copy {
    min-width: 0;
}

.hero-overline {
    display: inline-block;
    margin: 0 0 14px;
    padding: 6px 16px;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.85);
    border: 1px solid var(--line);
    font-size: 13px;
    font-weight: 700;
    letter-spacing: 3px;
    color: var(--ice-3);
}

.hero-title {
    margin: 0 0 18px;
    font-size: 44px;
    font-weight: 800;
    line-height: 1.28;
    letter-spacing: 1px;
}

.hero-title em {
    font-style: normal;
    background: linear-gradient(100deg, var(--ice-3), var(--ice-1) 60%, #a5d8ff);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.hero-sub {
    margin: 0 0 20px;
    font-size: 16px;
    color: var(--ink-2);
}

.hero-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin: 0 0 26px;
}

.hero-tags span {
    padding: 6px 16px;
    border-radius: 999px;
    background: var(--panel);
    border: 1px solid var(--line);
    font-size: 14px;
    color: var(--ink-2);
    box-shadow: 0 4px 10px rgba(30, 42, 82, 0.05);
}

/* 步骤卡（ol 编号） */

.entrance-steps {
    counter-reset: estep;
    margin: 0 0 28px;
    padding: 0;
    list-style: none;
}

.entrance-steps li {
    position: relative;
    counter-increment: estep;
    padding: 10px 0 10px 64px;
    border-bottom: 1px dashed var(--line);
}

.entrance-steps li:last-child {
    border-bottom: 0;
}

.entrance-steps li::before {
    content: counter(estep);
    position: absolute;
    left: 6px;
    top: 12px;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: linear-gradient(160deg, #fff, #dff1fa);
    border: 1px solid var(--ice-1);
    box-shadow: 0 6px 14px rgba(125, 211, 252, 0.35);
    color: var(--ice-3);
    font-weight: 800;
    font-size: 17px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.entrance-steps strong {
    display: block;
    font-size: 16px;
}

.entrance-steps p {
    margin: 2px 0 0;
    font-size: 14px;
    color: var(--ink-2);
}

/* CTA 按钮对 */

.cta-row {
    display: flex;
    flex-wrap: wrap;
    gap: 14px;
}

.btn-primary,
.btn-ghost {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    min-height: 48px;
    padding: 0 26px;
    border-radius: 999px;
    font-size: 15px;
    font-weight: 700;
    text-decoration: none;
    transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
}

.btn-primary {
    background: linear-gradient(120deg, var(--ice-2), var(--ice-3));
    border: 1px solid rgba(14, 165, 233, 0.5);
    color: #fff;
    box-shadow: 0 10px 22px rgba(56, 189, 248, 0.4);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 14px 28px rgba(56, 189, 248, 0.5);
}

.btn-ghost {
    background: var(--panel);
    border: 1px solid var(--line);
    color: var(--ice-3);
    box-shadow: var(--shadow-soft);
}

.btn-ghost:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lift);
}

/* hero 媒体：大图 + 浮动小图 */

.hero-media {
    position: relative;
    min-width: 0;
}

.media-main {
    overflow: hidden;
    border-radius: 28px;
    border: 6px solid rgba(255, 255, 255, 0.9);
    box-shadow: var(--shadow-lift);
}

.media-main img {
    width: 100%;
    aspect-ratio: 16 / 10;
    object-fit: cover;
}

.media-float {
    position: absolute;
    right: -22px;
    bottom: -26px;
    width: 40%;
    overflow: hidden;
    border-radius: 50%;
    border: 5px solid var(--panel);
    box-shadow: var(--shadow-lift);
    background: var(--panel);
}

.media-float img {
    width: 100%;
    aspect-ratio: 1 / 1;
    object-fit: cover;
}

.media-chip {
    position: absolute;
    left: -18px;
    top: 26px;
    padding: 10px 16px;
    border-radius: 999px;
    background: var(--panel);
    border: 1px solid var(--line);
    box-shadow: var(--shadow-soft);
    font-size: 13px;
    font-weight: 700;
    color: var(--ink-2);
}

/* ---------- 快速入口按钮卡 ---------- */

.quick-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 18px;
}

.quick-card {
    display: flex;
    flex-direction: column;
    gap: 10px;
    min-width: 0;
    padding: 26px 22px;
    border-radius: var(--r-lg);
    background: var(--panel);
    border: 1px solid rgba(217, 237, 248, 0.9);
    box-shadow: var(--shadow-soft);
    text-decoration: none;
    color: var(--ink);
    transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

.quick-card:hover {
    transform: translateY(-4px);
    border-color: var(--ice-1);
    box-shadow: var(--shadow-lift);
}

.quick-card i {
    font-size: 22px;
    color: var(--ice-3);
}

.quick-card strong {
    font-size: 17px;
}

.quick-card p {
    margin: 0;
    font-size: 14px;
    color: var(--ink-2);
}

/* ---------- 多端设备卡 ---------- */

.device-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 18px;
}

.device-card {
    min-width: 0;
    padding: 24px 22px;
    border-radius: var(--r-lg);
    background: linear-gradient(170deg, #ffffff, var(--frost));
    border: 1px solid var(--line);
    box-shadow: var(--shadow-soft);
}

.device-card .dev-head {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 12px;
}

.device-card .dev-head i {
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 14px;
    background: #dff1fa;
    color: var(--ice-3);
    font-size: 18px;
}

.device-card h3 {
    margin: 0;
    font-size: 17px;
}

.device-card dl {
    margin: 0;
}

.device-card dl div {
    display: flex;
    gap: 8px;
    padding: 5px 0;
    border-top: 1px dashed var(--line);
    font-size: 14px;
}

.device-card dt {
    color: var(--ice-3);
    white-space: nowrap;
}

.device-card dd {
    margin: 0;
    color: var(--ink-2);
}

/* ---------- 横向内容卡（体育区 / 娱乐区） ---------- */

.horiz-card {
    display: grid;
    grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
    gap: 0;
    overflow: hidden;
    margin-bottom: 22px;
    border-radius: 24px;
    background: var(--panel);
    border: 1px solid var(--line);
    box-shadow: var(--shadow-soft);
}

.horiz-card:nth-child(even) .card-media {
    order: 2;
}

.card-media {
    min-width: 0;
}

.card-media img {
    width: 100%;
    height: 100%;
    aspect-ratio: 16 / 10;
    object-fit: cover;
}

.card-body {
    padding: 30px 32px;
    min-width: 0;
}

.card-body h3 {
    margin: 0 0 10px;
    font-size: 22px;
}

.card-body p {
    margin: 0 0 12px;
    font-size: 15px;
    color: var(--ink-2);
}

.card-body a.more-link {
    font-size: 14px;
    font-weight: 700;
    color: var(--ice-3);
    text-decoration: none;
}

/* ---------- 迷你折叠（assist） ---------- */

.mini-help {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px;
}

.mini-help details {
    background: rgba(255, 255, 255, 0.85);
    border: 1px solid var(--line);
    border-radius: var(--r-md);
    padding: 4px 20px;
    box-shadow: 0 6px 14px rgba(30, 42, 82, 0.04);
}

.mini-help summary {
    cursor: pointer;
    padding: 14px 0;
    font-weight: 700;
    color: var(--ink);
    list-style: none;
    display: flex;
    align-items: center;
    gap: 10px;
}

.mini-help summary::-webkit-details-marker {
    display: none;
}

.mini-help summary::before {
    content: "❄";
    font-size: 13px;
    color: var(--ice-3);
}

.mini-help p {
    margin: 0 0 16px;
    padding-left: 26px;
    font-size: 14px;
    color: var(--ink-2);
}

/* ---------- 访客声音 ---------- */

.voices-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 18px;
}

.voice-card {
    min-width: 0;
    padding: 26px 24px;
    border-radius: var(--r-lg);
    background: var(--panel);
    border-top: 4px solid var(--ice-1);
    box-shadow: var(--shadow-soft);
}

.voice-card p {
    margin: 0 0 14px;
    font-size: 15px;
    color: var(--ink-2);
}

.voice-card cite {
    display: flex;
    align-items: center;
    gap: 10px;
    font-style: normal;
    font-size: 13px;
    color: var(--ink-3);
}

.voice-card cite i {
    color: var(--ice-1);
}

/* ---------- FAQ ---------- */

.faq-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px;
}

.faq-card {
    background: var(--panel);
    border: 1px solid var(--line);
    border-radius: var(--r-lg);
    padding: 6px 24px;
    box-shadow: var(--shadow-soft);
}

.faq-card summary {
    cursor: pointer;
    padding: 16px 0;
    font-weight: 700;
    font-size: 16px;
    color: var(--ink);
    list-style: none;
    display: flex;
    align-items: center;
    gap: 12px;
}

.faq-card summary::-webkit-details-marker {
    display: none;
}

.faq-card summary::after {
    content: "+";
    margin-left: auto;
    width: 26px;
    height: 26px;
    flex: none;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background: #e3f4fc;
    color: var(--ice-3);
    font-weight: 700;
    font-size: 16px;
    transition: transform 0.2s ease;
}

.faq-card[open] summary::after {
    transform: rotate(45deg);
}

.faq-card p {
    margin: 0 0 18px;
    padding-right: 6px;
    font-size: 14px;
    color: var(--ink-2);
}

/* ---------- 收尾 CTA ---------- */

.ice-cta {
    border-radius: 28px;
    padding: 52px 56px;
    text-align: center;
    background:
        radial-gradient(circle at 12% 20%, rgba(255, 255, 255, 0.6), transparent 40%),
        linear-gradient(135deg, #cfeffd, #7dd3fc 55%, #38bdf8);
    border: 1px solid rgba(255, 255, 255, 0.7);
    box-shadow: 0 22px 48px rgba(56, 189, 248, 0.3);
}

.ice-cta h2 {
    margin: 0 0 10px;
    font-size: 30px;
    font-weight: 800;
    color: var(--ink);
}

.ice-cta p {
    margin: 0 auto 24px;
    max-width: 560px;
    font-size: 15px;
    color: var(--ink-2);
}

.ice-cta .cta-row {
    justify-content: center;
}

/* ---------- footer：白底细冰蓝分隔 三列 + 友链 ---------- */

.site-footer {
    background: var(--panel);
    border-top: 3px solid;
    border-image: linear-gradient(90deg, transparent, #7dd3fc, #38bdf8, #7dd3fc, transparent) 1;
    padding-top: 44px;
    margin-top: 96px;
}

.footer-cols {
    display: grid;
    grid-template-columns: minmax(0, 1.3fr) minmax(0, 1fr) minmax(0, 1fr);
    gap: 40px;
    padding-bottom: 30px;
}

.footer-cols h3 {
    margin: 0 0 12px;
    font-size: 15px;
    letter-spacing: 2px;
    color: var(--ice-3);
}

.footer-brand {
    display: inline-block;
    margin-bottom: 10px;
    font-size: 20px;
    font-weight: 800;
    color: var(--ink);
    text-decoration: none;
}

.footer-cols p {
    margin: 0;
    font-size: 14px;
    color: var(--ink-2);
}

.footer-nav {
    display: flex;
    flex-wrap: wrap;
    gap: 4px 18px;
}

.footer-nav a,
.footer-tips a {
    font-size: 14px;
    color: var(--ink-2);
    text-decoration: none;
}

.footer-nav a:hover,
.footer-tips a:hover {
    color: var(--ice-3);
}

.footer-tips li {
    font-size: 14px;
    color: var(--ink-2);
}

.friend-links {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 8px 14px;
    padding: 18px 0;
    border-top: 1px solid var(--line);
}

.friend-links .friend-title {
    margin: 0 6px 0 0;
    font-size: 13px;
    font-weight: 700;
    letter-spacing: 2px;
    color: var(--ink-3);
}

.friend-links a {
    padding: 5px 14px;
    border-radius: 999px;
    background: var(--frost);
    border: 1px solid var(--line);
    font-size: 13px;
    color: var(--ink-2);
    text-decoration: none;
}

.friend-links a:hover {
    border-color: var(--ice-1);
    color: var(--ice-3);
}

.footer-bottom {
    padding: 18px 0 26px;
    border-top: 1px dashed var(--line);
    text-align: center;
    font-size: 13px;
    color: var(--ink-3);
}

.footer-bottom p {
    margin: 2px 0;
}

/* ---------- 内页通用：内容头部与图文块 ---------- */

.page-hero {
    padding: 56px 0 40px;
    text-align: center;
}

.page-hero .page-title {
    margin: 0 0 12px;
    font-size: 38px;
    font-weight: 800;
    letter-spacing: 1px;
}

.page-hero p {
    max-width: 720px;
    margin: 0 auto;
    font-size: 16px;
    color: var(--ink-2);
}

.split-block {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: 44px;
    align-items: center;
    margin-bottom: 40px;
}

.split-block.reverse .block-text {
    order: 2;
}

.split-block img {
    width: 100%;
    border-radius: 24px;
    border: 5px solid rgba(255, 255, 255, 0.9);
    box-shadow: var(--shadow-lift);
    aspect-ratio: 16 / 10;
    object-fit: cover;
}

.panel {
    background: var(--panel);
    border: 1px solid var(--line);
    border-radius: var(--r-lg);
    box-shadow: var(--shadow-soft);
    padding: 28px 30px;
}

.feat-list {
    display: grid;
    gap: 16px;
}

.feat-item {
    display: flex;
    gap: 16px;
    padding: 18px 20px;
    border-radius: var(--r-lg);
    background: rgba(255, 255, 255, 0.9);
    border: 1px solid var(--line);
}

.feat-item i {
    flex: none;
    width: 46px;
    height: 46px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background: #e3f4fc;
    color: var(--ice-3);
    font-size: 18px;
}

.feat-item h3 {
    margin: 0 0 4px;
    font-size: 17px;
}

.feat-item p {
    margin: 0;
    font-size: 14px;
    color: var(--ink-2);
}

.num-steps {
    counter-reset: nstep;
    margin: 0;
    padding: 0;
    list-style: none;
    display: grid;
    gap: 14px;
}

.num-steps li {
    counter-increment: nstep;
    position: relative;
    padding: 18px 22px 18px 66px;
    background: var(--panel);
    border: 1px solid var(--line);
    border-radius: var(--r-lg);
    box-shadow: var(--shadow-soft);
}

.num-steps li::before {
    content: counter(nstep);
    position: absolute;
    left: 16px;
    top: 16px;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: linear-gradient(160deg, #fff, #dff1fa);
    border: 1px solid var(--ice-1);
    color: var(--ice-3);
    font-weight: 800;
    display: flex;
    align-items: center;
    justify-content: center;
}

.num-steps strong {
    display: block;
    font-size: 16px;
}

.num-steps p {
    margin: 2px 0 0;
    font-size: 14px;
    color: var(--ink-2);
}

/* ---------- product deck ---------- */

.module-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 18px;
}

.module-card {
    min-width: 0;
    padding: 26px 24px;
    border-radius: var(--r-lg);
    background: var(--panel);
    border: 1px solid var(--line);
    box-shadow: var(--shadow-soft);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

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

.module-card .mod-head {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 10px;
}

.module-card .mod-head i {
    width: 42px;
    height: 42px;
    flex: none;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 14px;
    background: linear-gradient(150deg, #e3f4fc, #dff1fa);
    color: var(--ice-3);
    font-size: 17px;
}

.module-card h3 {
    margin: 0;
    font-size: 17px;
}

.module-card p {
    margin: 0;
    font-size: 14px;
    color: var(--ink-2);
}

.module-card p + p {
    margin-top: 6px;
}

/* ---------- news 列表 ---------- */

.news-layout {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 340px;
    gap: 36px;
    align-items: start;
}

.notice-item {
    display: flex;
    gap: 18px;
    padding: 22px 24px;
    background: var(--panel);
    border: 1px solid var(--line);
    border-radius: var(--r-lg);
    box-shadow: var(--shadow-soft);
    margin-bottom: 14px;
}

.notice-icon {
    flex: none;
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: linear-gradient(150deg, #e3f4fc, #dff1fa);
    color: var(--ice-3);
    font-size: 17px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.notice-body {
    min-width: 0;
}

.notice-body h3 {
    margin: 0 0 4px;
    font-size: 17px;
}

.notice-body p {
    margin: 0;
    font-size: 14px;
    color: var(--ink-2);
}

.tag-row {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin: 8px 0 0;
}

.tag {
    padding: 2px 12px;
    border-radius: 999px;
    background: var(--frost);
    border: 1px solid var(--line);
    font-size: 12px;
    color: var(--ink-3);
}

.tag-note {
    font-size: 12px;
    color: var(--ink-3);
}

.side-card {
    padding: 24px;
    background: var(--panel);
    border: 1px solid var(--line);
    border-radius: var(--r-lg);
    box-shadow: var(--shadow-soft);
}

.side-card img {
    width: 100%;
    border-radius: 16px;
    aspect-ratio: 16 / 10;
    object-fit: cover;
    margin-bottom: 16px;
}

.side-card h3 {
    margin: 0 0 10px;
    font-size: 18px;
}

.side-card ol {
    margin: 0;
    padding-left: 20px;
}

.side-card li {
    font-size: 14px;
    color: var(--ink-2);
}

/* ---------- contact frost 卡 ---------- */

.frost-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 18px;
}

.frost-card {
    padding: 26px 26px 14px;
    border-radius: var(--r-lg);
    background: linear-gradient(165deg, #ffffff, #eaf6fc);
    border: 1px solid var(--line);
    box-shadow: var(--shadow-soft);
}

.frost-card h3 {
    display: flex;
    align-items: center;
    gap: 10px;
    margin: 0 0 8px;
    font-size: 18px;
}

.frost-card h3 i {
    color: var(--ice-3);
}

.frost-card > p {
    margin: 0 0 6px;
    font-size: 14px;
    color: var(--ink-2);
}

.frost-card details {
    border-top: 1px dashed var(--line);
}

.frost-card summary {
    cursor: pointer;
    padding: 12px 0;
    font-weight: 700;
    font-size: 14px;
    list-style: none;
    display: flex;
    gap: 8px;
    align-items: center;
}

.frost-card summary::-webkit-details-marker {
    display: none;
}

.frost-card summary::before {
    content: "+";
    color: var(--ice-3);
    font-weight: 800;
}

.frost-card details[open] summary::before {
    content: "–";
}

.frost-card details p {
    margin: 0 0 14px;
    font-size: 14px;
    color: var(--ink-2);
}

/* ---------- app 指南 ---------- */

.diff-list {
    margin: 0;
}

.diff-list div {
    display: grid;
    grid-template-columns: 170px minmax(0, 1fr);
    gap: 18px;
    padding: 14px 4px;
    border-bottom: 1px dashed var(--line);
}

.diff-list div:last-child {
    border-bottom: 0;
}

.diff-list dt {
    font-weight: 700;
    color: var(--ice-3);
}

.diff-list dd {
    margin: 0;
    font-size: 14px;
    color: var(--ink-2);
}

.step-band {
    background: rgba(255, 255, 255, 0.75);
    border: 1px solid var(--line);
    border-radius: 28px;
    padding: 30px;
    margin-bottom: 40px;
}

/* ---------- 响应式 ---------- */

@media (max-width: 1020px) {
    .quick-grid,
    .voices-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .news-layout {
        grid-template-columns: minmax(0, 1fr);
    }

    .side-card {
        order: 2;
    }

    .footer-cols {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

@media (max-width: 920px) {
    .header-inner {
        grid-template-columns: minmax(0, 1fr) auto;
        min-height: 68px;
    }

    .nav-zone-left,
    .nav-zone-right {
        display: none;
    }

    .wordmark {
        justify-self: start;
        text-align: left;
    }

    .wordmark-top {
        font-size: 22px;
    }

    .nav-toggle {
        display: flex;
        justify-self: end;
    }

    .mobile-panel {
        display: none;
        padding: 10px 0 16px;
        border-top: 1px solid var(--line);
    }

    .mobile-panel a {
        display: block;
        padding: 12px 14px;
        border-radius: 12px;
        color: var(--ink-2);
        text-decoration: none;
        font-size: 16px;
    }

    .mobile-panel a:hover {
        background: rgba(255, 255, 255, 0.9);
        color: var(--ice-3);
    }

    .site-header.nav-open .mobile-panel {
        display: block;
    }

    .hero-grid,
    .split-block {
        grid-template-columns: minmax(0, 1fr);
        gap: 40px;
    }

    .hero {
        padding: 44px 0 64px;
    }

    .media-float {
        right: 8px;
    }

    .media-chip {
        left: 8px;
    }
}

@media (max-width: 680px) {
    .section {
        padding: 48px 0;
    }

    .sec-title,
    .page-hero .page-title {
        font-size: 27px;
    }

    .hero-title {
        font-size: 30px;
    }

    .quick-grid,
    .module-grid,
    .faq-grid,
    .mini-help,
    .voices-grid,
    .frost-grid {
        grid-template-columns: minmax(0, 1fr);
    }

    .device-grid {
        grid-template-columns: minmax(0, 1fr);
    }

    .horiz-card {
        grid-template-columns: minmax(0, 1fr);
    }

    .horiz-card .card-media img {
        aspect-ratio: 16 / 9;
    }

    .card-body {
        padding: 22px 20px;
    }

    .entrance-steps li {
        padding-left: 0;
    }

    .entrance-steps li::before {
        position: static;
        margin-bottom: 8px;
        width: 36px;
        height: 36px;
    }

    .ice-cta {
        padding: 40px 22px;
        border-radius: 22px;
    }

    .footer-cols {
        grid-template-columns: minmax(0, 1fr);
        gap: 26px;
    }

    .diff-list div {
        grid-template-columns: minmax(0, 1fr);
        gap: 2px;
    }

    .btn-primary,
    .btn-ghost {
        width: 100%;
    }

    .cta-row {
        flex-direction: column;
    }

    .media-main {
        border-width: 4px;
        border-radius: 20px;
    }

    .media-chip {
        display: none;
    }
}