/* ---------- Material 3 Expressive 设计令牌（种子 #6750A4） ---------- */
:root {
    --md-primary: #6750A4;
    --md-on-primary: #FFFFFF;
    --md-primary-container: #EADDFF;
    --md-on-primary-container: #21005D;
    --md-secondary: #625B71;
    --md-on-secondary: #FFFFFF;
    --md-secondary-container: #E8DEF8;
    --md-on-secondary-container: #1D192B;
    --md-tertiary: #7D5260;
    --md-on-tertiary: #FFFFFF;
    --md-tertiary-container: #FFD8E4;
    --md-on-tertiary-container: #31111D;
    --md-error: #B3261E;
    --md-on-error: #FFFFFF;
    --md-error-container: #F9DEDC;
    --md-on-error-container: #410E0B;
    --md-surface: #FEF7FF;
    --md-on-surface: #1D1B20;
    --md-surface-variant: #E7E0EC;
    --md-on-surface-variant: #49454F;
    --md-outline: #79747E;
    --md-outline-variant: #CAC4D0;
    --md-surface-container-low: #F7F2FA;
    --md-surface-container: #F3EDF7;
    --md-surface-container-high: #ECE6F0;
    --md-surface-container-highest: #E6E0E9;

    --radius-s: 8px;
    --radius-m: 12px;
    --radius-l: 16px;
    --radius-xl: 28px;
    --radius-full: 999px;

    --elevation-1: 0 1px 3px 1px rgba(0, 0, 0, 0.15), 0 1px 2px 0 rgba(0, 0, 0, 0.30);
    --elevation-2: 0 2px 6px 2px rgba(0, 0, 0, 0.15), 0 1px 2px 0 rgba(0, 0, 0, 0.30);
    --elevation-3: 0 4px 8px 3px rgba(0, 0, 0, 0.15), 0 1px 3px 0 rgba(0, 0, 0, 0.30);

    --container-max: 1080px;
}

[data-theme="dark"] {
    --md-primary: #D0BCFF;
    --md-on-primary: #381E72;
    --md-primary-container: #4F378B;
    --md-on-primary-container: #EADDFF;
    --md-secondary: #CCC2DC;
    --md-on-secondary: #332D41;
    --md-secondary-container: #4A4458;
    --md-on-secondary-container: #E8DEF8;
    --md-tertiary: #EFB8C8;
    --md-on-tertiary: #492532;
    --md-tertiary-container: #633B48;
    --md-on-tertiary-container: #FFD8E4;
    --md-error: #F2B8B5;
    --md-on-error: #601410;
    --md-error-container: #8C1D18;
    --md-on-error-container: #F9DEDC;
    --md-surface: #1C1B1F;
    --md-on-surface: #E6E1E5;
    --md-surface-variant: #49454F;
    --md-on-surface-variant: #CAC4D0;
    --md-outline: #938F99;
    --md-outline-variant: #49454F;
    --md-surface-container-low: #211F26;
    --md-surface-container: #26242B;
    --md-surface-container-high: #2B2930;
    --md-surface-container-highest: #353339;

    --elevation-1: 0 1px 3px 1px rgba(0, 0, 0, 0.30), 0 1px 2px 0 rgba(0, 0, 0, 0.50);
    --elevation-2: 0 2px 6px 2px rgba(0, 0, 0, 0.30), 0 1px 2px 0 rgba(0, 0, 0, 0.50);
    --elevation-3: 0 4px 8px 3px rgba(0, 0, 0, 0.30), 0 1px 3px 0 rgba(0, 0, 0, 0.50);
}

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: 76px;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
        "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
    color: var(--md-on-surface);
    background: var(--md-surface);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

/* ---------- Material Symbols 图标 ---------- */
.md-icon {
    font-family: "Material Symbols Rounded";
    font-weight: normal;
    font-style: normal;
    font-size: 24px;
    line-height: 1;
    letter-spacing: normal;
    text-transform: none;
    display: inline-block;
    white-space: nowrap;
    word-wrap: normal;
    direction: ltr;
    font-variation-settings: "FILL" 1, "wght" 500, "GRAD" 0, "opsz" 24;
    user-select: none;
    flex: none;
}

.md-sm {
    font-size: 20px;
    font-variation-settings: "FILL" 1, "wght" 500, "GRAD" 0, "opsz" 20;
}

/* ---------- 顶部应用栏 ---------- */
.app-bar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    background: transparent;
    color: var(--md-on-surface);
    transition: background 0.25s ease, box-shadow 0.25s ease;
}

.app-bar.is-scrolled {
    background: color-mix(in srgb, var(--md-surface) 86%, transparent);
    -webkit-backdrop-filter: blur(16px) saturate(1.4);
    backdrop-filter: blur(16px) saturate(1.4);
    box-shadow: inset 0 -1px 0 var(--md-outline-variant);
}

.app-bar-inner {
    max-width: 1120px;
    margin: 0 auto;
    height: 64px;
    padding: 0 24px;
    display: flex;
    align-items: center;
    gap: 16px;
}

.brand {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    color: inherit;
}

.brand-icon {
    width: 32px;
    height: 32px;
    border-radius: 8px;
    display: block;
}

.brand-name {
    font-size: 18px;
    font-weight: 700;
    letter-spacing: 0.2px;
}

.nav-links {
    display: inline-flex;
    gap: 2px;
    margin-left: auto;
}

.nav-links a {
    position: relative;
    overflow: hidden;
    color: var(--md-on-surface-variant);
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
    padding: 8px 14px;
    border-radius: var(--radius-full);
    transition: background 0.2s ease, color 0.2s ease;
}

.nav-links a:hover {
    background: color-mix(in srgb, var(--md-on-surface) 8%, transparent);
    color: var(--md-on-surface);
}

.nav-links a.active {
    background: var(--md-secondary-container);
    color: var(--md-on-secondary-container);
    font-weight: 600;
}

.icon-btn {
    width: 40px;
    height: 40px;
    border: none;
    border-radius: var(--radius-full);
    background: transparent;
    color: var(--md-on-surface-variant);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: background 0.2s ease, color 0.2s ease;
}

.icon-btn:hover {
    background: color-mix(in srgb, var(--md-on-surface) 8%, transparent);
    color: var(--md-on-surface);
}

.app-bar-cta {
    margin-left: 0;
}

/* ---------- 按钮（M3 变体） ---------- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    height: 44px;
    padding: 0 24px;
    border-radius: var(--radius-full);
    font-family: inherit;
    font-size: 15px;
    font-weight: 600;
    text-decoration: none;
    border: none;
    cursor: pointer;
    -webkit-tap-highlight-color: transparent;
    transition: box-shadow 0.2s ease, background 0.2s ease;
    overflow: hidden;
}

.btn-small { height: 40px; padding: 0 18px; font-size: 14px; }
.btn-large { height: 48px; padding: 0 28px; font-size: 16px; }

.btn-filled {
    background: var(--md-primary);
    color: var(--md-on-primary);
    box-shadow: var(--elevation-2);
}

.btn-tonal {
    background: var(--md-secondary-container);
    color: var(--md-on-secondary-container);
}

.btn-tonal:hover {
    background: color-mix(in srgb, var(--md-secondary-container) 85%, var(--md-secondary));
}

/* 禁用态按钮：仅展示，不响应点击 */
.btn-disabled {
    background: color-mix(in srgb, var(--md-on-surface) 8%, transparent);
    color: var(--md-on-surface-variant);
    cursor: default;
}

.btn:focus-visible,
.icon-btn:focus-visible,
.fab:focus-visible,
.faq-item summary:focus-visible {
    outline: 2px solid var(--md-primary);
    outline-offset: 2px;
}

/* ---------- Hero 主视觉 ---------- */
.hero {
    position: relative;
    overflow: hidden;
    padding: 128px 24px 96px;
    background:
        radial-gradient(48% 42% at 18% 12%, color-mix(in srgb, var(--md-primary-container) 70%, transparent), transparent 70%),
        radial-gradient(40% 36% at 88% 18%, color-mix(in srgb, var(--md-tertiary-container) 55%, transparent), transparent 70%),
        radial-gradient(42% 40% at 70% 92%, color-mix(in srgb, var(--md-secondary-container) 55%, transparent), transparent 70%),
        var(--md-surface);
}

.hero-inner {
    max-width: 760px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 18px;
    text-align: center;
}

.pill {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 14px;
    border-radius: var(--radius-full);
    background: color-mix(in srgb, var(--md-primary-container) 70%, transparent);
    color: var(--md-on-primary-container);
    font-size: 13px;
    font-weight: 600;
    letter-spacing: 0.4px;
}

.pill-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--md-tertiary);
    box-shadow: 0 0 0 3px color-mix(in srgb, var(--md-tertiary) 25%, transparent);
}

.display {
    font-size: clamp(32px, 5vw, 48px);
    font-weight: 800;
    line-height: 1.2;
    letter-spacing: -0.5px;
}

.display em {
    font-style: normal;
    color: var(--md-primary);
    background: linear-gradient(90deg, var(--md-primary), var(--md-tertiary));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-sub {
    color: var(--md-on-surface-variant);
    font-size: 17px;
    max-width: 520px;
}

.hero-actions {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
    justify-content: center;
    margin-top: 6px;
}

.hero-meta {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
    justify-content: center;
    margin-top: 8px;
}

.chip {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 14px;
    border-radius: var(--radius-full);
    border: 1px solid var(--md-outline-variant);
    background: var(--md-surface);
    color: var(--md-on-surface-variant);
    font-size: 13px;
    font-weight: 500;
}

.chip .md-icon { font-size: 18px; font-variation-settings: "FILL" 0, "wght" 500; }

/* ---------- Hero 签名元素：2x2 课表小部件（复刻 App 内渲染） ---------- */
.hero-mock {
    width: min(520px, 100%);
    margin-top: 26px;
    position: relative;
}

.hero-mock::before {
    content: "";
    position: absolute;
    inset: -36px -26px;
    border-radius: 48px;
    background: radial-gradient(55% 60% at 50% 50%, color-mix(in srgb, var(--md-primary-container) 55%, transparent), transparent 72%);
    filter: blur(8px);
    z-index: 0;
}

/* 小部件外壳：圆角 16 · 内边距 8（与 Android ScheduleWidget 一致） */
.widget-card {
    position: relative;
    z-index: 1;
    background: var(--md-surface);
    border: 1px solid var(--md-outline-variant);
    border-radius: 16px;
    padding: 10px;
    box-shadow: var(--elevation-3);
    text-align: left;
}

/* 头部：左侧「第N周」，右侧「周X M/D」（primary 加粗） */
.widget-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 2px 4px 8px;
}

.w-week {
    font-size: 12px;
    color: var(--md-on-surface);
    font-weight: 500;
}

.w-date {
    font-size: 13px;
    font-weight: 700;
    color: var(--md-primary);
}

/* 2×2 网格：与宽档小部件一致 */
.w-items {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 8px;
}

/* 课程卡：容器色背景 · 圆角 8 · 内边距 8 */
.w-item {
    border-radius: 8px;
    padding: 8px 10px;
    min-width: 0;
}

.w-item:first-child { margin-bottom: 0; }

.w-name {
    display: block;
    font-size: 13px;
    font-weight: 700;
}

.w-time {
    display: block;
    margin-top: 2px;
    font-size: 10px;
    color: var(--md-on-surface-variant);
}

.w-loc {
    display: block;
    font-size: 10px;
    color: var(--md-on-surface-variant);
}

/* 四类课程配色（与 App typeColor/typeContainerColor 一致） */
.w-normal     { background: var(--md-primary-container); }
.w-normal .w-name     { color: var(--md-primary); }
.w-custom     { background: var(--md-secondary-container); }
.w-custom .w-name     { color: var(--md-secondary); }
.w-experiment { background: var(--md-tertiary-container); }
.w-experiment .w-name { color: var(--md-tertiary); }
.w-exam       { background: var(--md-error-container); }
.w-exam .w-name       { color: var(--md-error); }

/* 图例 */
.widget-legend {
    position: relative;
    z-index: 1;
    margin-top: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 14px;
    flex-wrap: wrap;
}

.legend-chip {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 12px;
    color: var(--md-on-surface-variant);
}

.legend-dot {
    width: 10px;
    height: 10px;
    border-radius: 3px;
}

.d-normal     { background: var(--md-primary-container); }
.d-custom     { background: var(--md-secondary-container); }
.d-experiment { background: var(--md-tertiary-container); }
.d-exam       { background: var(--md-error-container); }

.legend-note {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    font-size: 12px;
    color: var(--md-on-surface-variant);
    opacity: 0.85;
}

.legend-note .md-icon { font-size: 15px; color: var(--md-primary); }

/* ---------- 通用区块 ---------- */
.section {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 64px 24px;
}

.section-surface {
    max-width: none;
    background: var(--md-surface-container-low);
    border-top: 1px solid var(--md-outline-variant);
    border-bottom: 1px solid var(--md-outline-variant);
}

.section-head {
    text-align: center;
    max-width: 600px;
    margin: 0 auto 40px;
}

.eyebrow {
    display: inline-block;
    font-size: 13px;
    font-weight: 700;
    letter-spacing: 3px;
    text-transform: uppercase;
    color: var(--md-primary);
    margin-bottom: 10px;
}

.h2 {
    font-size: clamp(26px, 3.4vw, 34px);
    font-weight: 800;
    letter-spacing: -0.3px;
    margin-bottom: 10px;
}

.section-sub {
    color: var(--md-on-surface-variant);
    font-size: 16px;
}

/* ---------- 卡片 ---------- */
.card {
    background: var(--md-surface-container);
    border-radius: var(--radius-l);
    box-shadow: var(--elevation-1);
    overflow: hidden;
}

.icon-tile {
    width: 56px;
    height: 56px;
    border-radius: 18px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: var(--tile, var(--md-primary-container));
    color: var(--tile-fg, var(--md-on-primary-container));
    flex: none;
}

.tile-large {
    width: 64px;
    height: 64px;
    border-radius: 20px;
    margin-bottom: 4px;
}

.tile-large .md-icon { font-size: 32px; }

/* ---------- 介绍 ---------- */
.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
    gap: 20px;
}

.feature-card {
    padding: 28px 24px;
}

.feature-card h3 {
    font-size: 18px;
    font-weight: 700;
    margin: 16px 0 8px;
}

.feature-card p {
    color: var(--md-on-surface-variant);
    font-size: 15px;
}

/* ---------- 下载 ---------- */
.download-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(190px, 1fr));
    gap: 20px;
}

.download-card {
    padding: 28px 24px 24px;
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
}

.download-card h3 {
    font-size: 17px;
    font-weight: 700;
    margin-top: 12px;
}

.download-detail {
    color: var(--md-on-surface-variant);
    font-size: 14px;
    margin-bottom: 16px;
}

.download-card .btn { width: 100%; }

/* 未发布平台：整卡弱化，只说明状态 */
.download-card.is-disabled {
    box-shadow: none;
    border: 1px dashed var(--md-outline-variant);
    background: transparent;
}

.download-card.is-disabled .icon-tile {
    background: color-mix(in srgb, var(--md-on-surface) 6%, transparent);
    color: var(--md-on-surface-variant);
}

.download-card.is-disabled h3,
.download-card.is-disabled .download-detail {
    color: var(--md-on-surface-variant);
}

.download-note {
    max-width: 780px;
    margin: 24px auto 0;
    display: flex;
    align-items: flex-start;
    gap: 8px;
    font-size: 14px;
    color: var(--md-on-surface-variant);
}

.download-note .md-icon {
    font-size: 18px;
    flex: none;
    margin-top: 1px;
}

.download-empty {
    grid-column: 1 / -1;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    color: var(--md-on-surface-variant);
    font-size: 15px;
    padding: 32px;
}

/* ---------- 版本信息 ---------- */
.release-panel {
    max-width: 780px;
    margin: 0 auto;
    padding: 32px;
}

.release-head {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
    gap: 8px;
    padding-bottom: 24px;
    border-bottom: 1px solid var(--md-outline-variant);
}

.release-ver {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.release-label {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 13px;
    color: var(--md-on-surface-variant);
}

.release-current {
    font-size: 26px;
    font-weight: 800;
    letter-spacing: -0.3px;
}

.release-code {
    color: var(--md-primary);
}

.release-body {
    padding-top: 24px;
}

.release-subtitle {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 17px;
    font-weight: 700;
    margin-bottom: 14px;
}

.version-list {
    display: flex;
    flex-direction: column;
}

.version-row {
    padding: 14px 0;
    border-bottom: 1px dashed var(--md-outline-variant);
}

.version-row:last-child { border-bottom: none; }

.version-line {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-wrap: wrap;
}

.version-name {
    font-size: 16px;
    font-weight: 700;
}

.version-date {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    font-size: 13px;
    color: var(--md-on-surface-variant);
    margin-left: auto;
}

.badge {
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 0.4px;
    padding: 3px 10px;
    border-radius: var(--radius-full);
    background: var(--md-primary-container);
    color: var(--md-on-primary-container);
}

.badge-outline {
    background: transparent;
    border: 1px solid var(--md-outline-variant);
    color: var(--md-on-surface-variant);
}

.version-note {
    margin-top: 6px;
    color: var(--md-on-surface-variant);
    font-size: 14px;
}

/* 版本名链到 Gitee 发行版页 */
.version-link {
    color: inherit;
    text-decoration: none;
}

.version-link:hover {
    color: var(--md-primary);
    text-decoration: underline;
    text-underline-offset: 3px;
}

.version-apk {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    font-size: 13px;
    font-weight: 600;
    color: var(--md-primary);
    text-decoration: none;
    padding: 3px 10px;
    border-radius: var(--radius-full);
    border: 1px solid var(--md-outline-variant);
}

.version-apk:hover {
    background: color-mix(in srgb, var(--md-primary) 10%, transparent);
}

.version-changes {
    margin-top: 8px;
    padding-left: 18px;
    color: var(--md-on-surface-variant);
    font-size: 14px;
}

.version-changes li { margin-bottom: 3px; }
.version-changes li:last-child { margin-bottom: 0; }

.release-more {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    margin-top: 20px;
    font-size: 14px;
    font-weight: 600;
    color: var(--md-primary);
    text-decoration: none;
}

.release-more:hover { text-decoration: underline; text-underline-offset: 3px; }

/* ---------- 常见问题 ---------- */
.faq-list {
    max-width: 760px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.faq-item {
    background: var(--md-surface-container);
    border-radius: var(--radius-l);
    box-shadow: var(--elevation-1);
    overflow: hidden;
}

.faq-item[open] {
    box-shadow: var(--elevation-2);
}

.faq-item summary {
    list-style: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    padding: 18px 22px;
    font-size: 15px;
    font-weight: 600;
    -webkit-tap-highlight-color: transparent;
}

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

.faq-item summary .md-icon {
    color: var(--md-on-surface-variant);
    transition: transform 0.25s ease;
}

.faq-item[open] summary .md-icon {
    transform: rotate(180deg);
}

.faq-body {
    padding: 0 22px 18px;
    color: var(--md-on-surface-variant);
    font-size: 15px;
}

/* ---------- 其他信息 ---------- */
.info-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 20px;
}

.info-card {
    padding: 24px;
}

.info-card h3 {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 17px;
    font-weight: 700;
    margin-bottom: 10px;
}

.info-card h3 .md-icon {
    color: var(--md-primary);
    font-size: 22px;
}

.info-card p {
    color: var(--md-on-surface-variant);
    font-size: 15px;
}

/* ---------- 关于应用（复刻 App 内「关于」页） ---------- */
.about-panel {
    max-width: 780px;
    margin: 32px auto 0;
    padding: 24px;
}

.about-title {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 17px;
    font-weight: 700;
    margin-bottom: 12px;
}

.about-title .md-icon { color: var(--md-primary); }

.about-list {
    display: flex;
    flex-direction: column;
}

.about-row {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 12px 8px;
    border-bottom: 1px dashed var(--md-outline-variant);
}

.about-row:last-child { border-bottom: none; }

.about-icon {
    width: 40px;
    height: 40px;
    flex: none;
    border-radius: 50%;
    background: color-mix(in srgb, var(--md-primary-container) 70%, transparent);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    color: var(--md-on-surface);
}

.about-icon .md-icon {
    font-size: 22px;
    color: var(--md-on-surface);
    opacity: 0.7;
}

.about-label {
    font-size: 15px;
    font-weight: 500;
    color: var(--md-on-surface);
    flex: 1;
}

.about-value {
    font-size: 15px;
    font-weight: 600;
    color: var(--md-on-surface-variant);
    text-align: right;
}

@media (max-width: 480px) {
    .about-value { font-size: 14px; }
}

/* ---------- 界面速览（复刻 App 内真实布局元素） ---------- */
.screens-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
    gap: 32px;
    max-width: 920px;
    margin: 0 auto;
    align-items: start;
}

.screen-card {
    padding: 24px 24px 20px;
    display: flex;
    flex-direction: column;
    gap: 16px;
    min-width: 0;
}

.screen-card-head {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 0 4px;
}

.screen-card-head > .md-icon {
    font-size: 20px;
    color: var(--md-primary);
}

.sc-title {
    font-size: 17px;
    font-weight: 700;
}

.sc-tag {
    margin-left: auto;
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 0.4px;
    color: var(--md-on-surface-variant);
    border: 1px solid var(--md-outline-variant);
    padding: 2px 10px;
    border-radius: var(--radius-full);
}

/* 机内屏幕容器 */
.phone {
    width: 100%;
    max-width: 380px;
    margin: 0 auto;
    border: 1px solid var(--md-outline-variant);
    border-radius: 28px;
    padding: 10px;
    background: var(--md-surface);
    box-shadow: var(--elevation-2);
}

.phone-screen {
    background: var(--md-surface-container-low);
    border-radius: 20px;
    padding: 14px;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

/* 问候卡：primary-container · 圆角 16 · 边框（GreetingCard） */
.g-card {
    display: flex;
    align-items: center;
    gap: 12px;
    background: color-mix(in srgb, var(--md-primary-container) 80%, transparent);
    border: 1px solid var(--md-outline-variant);
    border-radius: var(--radius-l);
    padding: 14px 16px;
}

.g-title {
    display: block;
    font-size: 18px;
    font-weight: 700;
    color: var(--md-on-primary-container);
}

.g-sub {
    display: block;
    font-size: 12px;
    margin-top: 2px;
    color: color-mix(in srgb, var(--md-on-primary-container) 70%, transparent);
}

.g-avatar {
    margin-left: auto;
    flex: none;
    width: 46px;
    height: 46px;
    border-radius: 50%;
    background: var(--md-primary);
    color: var(--md-on-primary);
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.g-avatar .md-icon { font-size: 30px; }

.ui-label {
    font-size: 15px;
    font-weight: 700;
    padding: 0 2px;
}

/* 常用功能 2×2 网格（FunctionCard：基调容器色 · 圆角 16 · 边框） */
.fn-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px;
}

.fn-card {
    border-radius: var(--radius-l);
    border: 1px solid var(--md-outline-variant);
    padding: 14px;
    display: flex;
    flex-direction: column;
    gap: 12px;
    min-height: 112px;
    overflow: hidden;
}

.fn-tone-prim { background: color-mix(in srgb, var(--md-primary-container) 80%, transparent); }
.fn-tone-sec  { background: color-mix(in srgb, var(--md-secondary-container) 80%, transparent); }
.fn-tone-ter  { background: color-mix(in srgb, var(--md-tertiary-container) 80%, transparent); }

.fn-bubble {
    width: 40px;
    height: 40px;
    flex: none;
    border-radius: 50%;
    background: color-mix(in srgb, var(--md-surface) 50%, transparent);
    color: var(--md-on-surface);
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.fn-bubble .md-icon { font-size: 22px; }

.fn-title {
    display: block;
    font-size: 14px;
    font-weight: 700;
    color: var(--md-on-surface);
}

.fn-desc {
    display: block;
    font-size: 11px;
    color: var(--md-on-surface-variant);
}

/* 日程时间线卡片（HomeScheduleTimelineCard） */
.tl-card {
    border-radius: var(--radius-l);
    border: 1px solid var(--md-outline-variant);
    padding: 12px 0 10px;
}

.tl-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 14px;
}

.tl-title {
    display: block;
    font-size: 17px;
    font-weight: 700;
}

.tl-date {
    display: block;
    font-size: 11px;
    color: var(--md-on-surface-variant);
}

.tl-collapse {
    color: var(--md-on-surface-variant);
}

.tl-collapse .md-icon { font-size: 20px; }

.tl-chips {
    display: flex;
    gap: 8px;
    padding: 8px 14px 0;
}

.tl-chip {
    display: inline-flex;
    align-items: center;
    gap: 2px;
    font-size: 11px;
    font-weight: 600;
    color: var(--md-primary);
    background: color-mix(in srgb, var(--md-surface-variant) 70%, transparent);
    border-radius: var(--radius-full);
    padding: 3px 8px 3px 6px;
}

.tl-chip .md-icon { font-size: 11px; }

/* 时间线主体：每半小时 22px，4 小时共 176px */
.tl-body {
    position: relative;
    height: 176px;
    margin-top: 8px;
}

.tl-axis {
    position: absolute;
    inset: 0 auto 0 6px;
    width: 38px;
}

.tl-tick {
    position: absolute;
    right: 6px;
    font-size: 9px;
    transform: translateY(-50%);
    color: var(--md-on-surface-variant);
}

.tl-tick.faint { opacity: 0.55; }

.tl-grid {
    position: absolute;
    top: 0;
    left: 48px;
    right: 0;
    height: 100%;
    background: repeating-linear-gradient(to bottom,
        color-mix(in srgb, var(--md-outline-variant) 35%, transparent) 0 1px,
        transparent 1px 22px,
        color-mix(in srgb, var(--md-outline-variant) 14%, transparent) 22px 23px,
        transparent 23px 44px);
}

.tl-events {
    position: absolute;
    top: 0;
    left: 48px;
    right: 8px;
    height: 100%;
}

.tl-event {
    position: absolute;
    border-radius: 8px;
    border: 1px solid var(--md-outline-variant);
    padding: 4px 6px;
    overflow: hidden;
}

.te-name {
    display: block;
    font-size: 11px;
    font-weight: 700;
    line-height: 1.25;
}

.te-time {
    display: block;
    font-size: 9px;
    line-height: 1.2;
    margin-top: 1px;
}

.te-loc {
    display: block;
    font-size: 9px;
    line-height: 1.2;
}

/* 日程事件配色（homeEventContainerColor：课程/实验/考试） */
.te-course { background: color-mix(in srgb, var(--md-primary-container) 92%, transparent); color: var(--md-on-primary-container); }
.te-exp    { background: color-mix(in srgb, var(--md-secondary-container) 92%, transparent); color: var(--md-on-secondary-container); }
.te-exam   { background: color-mix(in srgb, var(--md-error-container) 92%, transparent); color: var(--md-on-error-container); }

/* 当前时间指示器（横跨刻度轴与条目区，同 App） */
.tl-now {
    position: absolute;
    left: 6px;
    right: 8px;
    height: 2px;
    background: color-mix(in srgb, var(--md-primary) 85%, transparent);
}

.tl-now-pill {
    position: absolute;
    left: 6px;
    font-size: 9px;
    font-weight: 700;
    color: var(--md-on-primary);
    background: var(--md-primary);
    border-radius: var(--radius-full);
    padding: 1px 6px;
}

/* ---------- 课程表：周导航胶囊 + ScheduleGrid 复刻 ---------- */
/* 周导航：当前周 Event 图标 + 「第N周」，primary 高亮（同课表页胶囊） */
.sc-week {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    align-self: center;
    font-size: 14px;
    font-weight: 700;
    color: var(--md-primary);
}

.sc-week .md-icon {
    font-size: 16px;
    color: var(--md-primary);
}

/* 网格整体：左时间列 28px + 7 日均分（--cw 相对于条目区解析，避免重复减时间列） */
.sg {
    --cw: calc(100% / 7);
    border: 1px solid var(--md-outline-variant);
    border-radius: var(--radius-m);
    overflow: hidden;
    background: var(--md-surface);
}

/* 顶部星期栏（左角「10月」+ 周一~周日） */
.sg-head {
    display: flex;
    align-items: stretch;
    height: 30px;
    border-bottom: 1px solid color-mix(in srgb, var(--md-outline-variant) 45%, transparent);
}

.sg-corner {
    width: 28px;
    flex: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 10px;
    font-weight: 700;
    color: var(--md-on-surface-variant);
    border-right: 1px solid color-mix(in srgb, var(--md-outline-variant) 45%, transparent);
}

.sg-day {
    flex: 1;
    min-width: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    font-weight: 700;
    border-right: 1px solid color-mix(in srgb, var(--md-outline-variant) 45%, transparent);
}

.sg-day:last-child { border-right: none; }

.sg-day i {
    font-style: normal;
    font-size: 8px;
    font-weight: 500;
    line-height: 1;
    color: var(--md-on-surface-variant);
    margin-top: 1px;
}

/* 今日：secondaryContainer 底 + onPrimaryContainer 字（同 DayHeader） */
.sg-today {
    background: var(--md-secondary-container);
    color: var(--md-on-primary-container);
    border-radius: 8px;
}

.sg-today i { color: var(--md-on-primary-container); }

/* 主体：左时间列 + 网格线 + 课程块三层 */
.sg-body {
    position: relative;
    height: 220px; /* 5 节 × 44px */
}

.sg-axis {
    position: absolute;
    top: 0;
    left: 0;
    bottom: 0;
    width: 28px;
    display: flex;
    flex-direction: column;
}

.sg-sec {
    height: 44px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 1px;
    border-bottom: 1px solid color-mix(in srgb, var(--md-outline-variant) 45%, transparent);
}

.sg-sec:last-child { border-bottom: none; }

.sg-sec b {
    font-size: 13px;
    line-height: 1;
}

.sg-sec em {
    font-style: normal;
    font-size: 8px;
    line-height: 1;
    color: var(--md-on-surface-variant);
}

.sg-grid {
    position: absolute;
    top: 0;
    left: 28px;
    right: 0;
    bottom: 0;
    display: flex;
}

.sg-col {
    flex: 1;
    border-right: 1px solid color-mix(in srgb, var(--md-outline-variant) 45%, transparent);
    background: repeating-linear-gradient(to bottom,
        color-mix(in srgb, var(--md-outline-variant) 45%, transparent) 0 1px,
        transparent 1px 44px);
}

.sg-col:last-child { border-right: none; }

.sg-courses {
    position: absolute;
    top: 0;
    left: 28px;
    right: 0;
    bottom: 0;
}

/* 课程卡：src/课表页同构（哈希配色底 · 圆角 8 · 边框 · @地点） */
.sg-block {
    position: absolute;
    width: var(--cw);
    padding: 5px;
    border-radius: 8px;
    border: 1px solid rgba(102, 102, 102, 0.25);
    display: flex;
    flex-direction: column;
    gap: 2px;
    overflow: hidden;
    color: var(--md-on-surface);
}

[data-theme="dark"] .sg-block { border-color: rgba(204, 204, 204, 0.25); }

.sg-block b {
    font-size: 11px;
    line-height: 1.3;
    font-weight: 700;
}

.sg-block i {
    font-style: normal;
    font-size: 9px;
    line-height: 1.2;
    font-weight: 700;
    opacity: 0.85;
}

/* 课程哈希配色（DEFAULT_COLOR_MAPS 浅/深对，src 哈希取色） */
.c1 { background: color-mix(in srgb, #FFE699 90%, transparent); }
.c3 { background: color-mix(in srgb, #CCFF99 90%, transparent); }
.c7 { background: color-mix(in srgb, #99E6FF 90%, transparent); }
.c8 { background: color-mix(in srgb, #B399FF 90%, transparent); }

[data-theme="dark"] .c1 { background: color-mix(in srgb, #664D00 90%, transparent); }
[data-theme="dark"] .c3 { background: color-mix(in srgb, #336600 90%, transparent); }
[data-theme="dark"] .c7 { background: color-mix(in srgb, #004D66 90%, transparent); }
[data-theme="dark"] .c8 { background: color-mix(in srgb, #1A0066 90%, transparent); }

.screens-note {
    text-align: center;
    font-size: 12px;
    color: var(--md-on-surface-variant);
    margin-top: 24px;
}

.screens-note .md-icon {
    font-size: 14px;
    vertical-align: -2px;
}

/* ---------- M3 涟漪（按压反馈，替代悬停上升） ---------- */
.ripple-ink {
    position: absolute;
    border-radius: 50%;
    background: radial-gradient(circle,
        color-mix(in srgb, var(--md-on-surface) 14%, transparent) 0 55%,
        transparent 72%);
    transform: scale(0);
    opacity: 0.6;
    pointer-events: none;
    z-index: 2;
}

.ripple-ink.active {
    animation: m3-ripple 0.55s cubic-bezier(0.2, 0, 0, 1) forwards;
}

@keyframes m3-ripple {
    to {
        transform: scale(1);
        opacity: 0;
    }
}

/* ---------- 页脚 ---------- */
.footer {
    background: color-mix(in srgb, var(--md-on-surface) 92%, var(--md-surface));
    color: var(--md-surface-variant);
    text-align: center;
    padding: 40px 24px;
}

.footer-brand {
    color: color-mix(in srgb, var(--md-on-surface) 40%, var(--md-surface));
    font-weight: 600;
    margin-bottom: 6px;
}

.footer-meta {
    font-size: 14px;
    opacity: 0.8;
}

/* ---------- 回到顶部 FAB ---------- */
.fab {
    position: fixed;
    right: 24px;
    bottom: 24px;
    z-index: 90;
width: 56px;
    height: 56px;
    border: none;
    border-radius: 16px;
    background: var(--md-primary-container);
    color: var(--md-on-primary-container);
    box-shadow: var(--elevation-3);
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    opacity: 0;
    pointer-events: none;
    transform: translateY(12px);
    transition: opacity 0.25s ease, transform 0.25s ease;
}

.fab.show {
    opacity: 1;
    pointer-events: auto;
    transform: none;
}

.fab:hover {
    box-shadow: 0 6px 12px 4px rgba(0, 0, 0, 0.22), 0 2px 4px 0 rgba(0, 0, 0, 0.30);
}

/* ---------- 响应式 ---------- */
@media (max-width: 760px) {
    .nav-links { display: none; }
    .hero { padding-top: 96px; }
    .hero-actions .btn { flex: 1; min-width: 160px; }
    .widget-legend { gap: 10px; }
}

@media (max-width: 480px) {
    .app-bar-inner { padding: 0 12px; gap: 10px; }
    .app-bar-cta span.md-icon { display: none; }
    .section { padding: 48px 16px; }
    .release-panel { padding: 24px; }
    .release-current { font-size: 22px; }
    .fab { right: 16px; bottom: 16px; }
}

/* ---------- iOS 内测入口按钮（hero 显眼位） ---------- */
.btn-beta {
    background: linear-gradient(135deg, var(--md-primary-container), var(--md-tertiary-container));
    color: var(--md-on-primary-container);
    box-shadow: var(--elevation-2);
}

.btn-beta:hover {
    box-shadow: var(--elevation-3);
}

/* ---------- iOS 内测申请页（ios-beta.php） ---------- */
.hero-beta { padding-bottom: 56px; }

.beta-wrap {
    max-width: 640px;
    margin: 0 auto;
}

.beta-panel {
    padding: 28px;
    display: flex;
    flex-direction: column;
    gap: 20px;
}

/* 步骤条：三步等分，当前高亮、已完成描边 */
.beta-steps {
    display: flex;
    gap: 8px;
    list-style: none;
}

.beta-step {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 8px;
    border-radius: var(--radius-full);
    background: color-mix(in srgb, var(--md-on-surface) 6%, transparent);
    color: var(--md-on-surface-variant);
    font-size: 13px;
    font-weight: 600;
    transition: background 0.2s ease, color 0.2s ease;
}

.beta-step .step-no {
    width: 24px;
    height: 24px;
    flex: none;
    border-radius: 50%;
    background: var(--md-surface-container-highest);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
}

.beta-step.is-active {
    background: var(--md-secondary-container);
    color: var(--md-on-secondary-container);
}

.beta-step.is-active .step-no {
    background: var(--md-primary);
    color: var(--md-on-primary);
}

.beta-step.is-done {
    color: var(--md-primary);
}

.beta-step.is-done .step-no {
    background: var(--md-primary-container);
    color: var(--md-on-primary-container);
}

@media (max-width: 480px) {
    .beta-step { font-size: 12px; padding: 8px 4px; gap: 5px; }
}

/* 名额进度条 */
.beta-quota { width: 100%; }

.beta-quota-bar {
    height: 8px;
    border-radius: var(--radius-full);
    background: var(--md-surface-container-highest);
    overflow: hidden;
}

.beta-quota-fill {
    height: 100%;
    border-radius: var(--radius-full);
    background: linear-gradient(90deg, var(--md-primary), var(--md-tertiary));
    transition: width 0.4s ease;
}

.beta-quota-text {
    margin-top: 6px;
    text-align: center;
    font-size: 13px;
    color: var(--md-on-surface-variant);
}

/* 通用隐藏工具类 */
.is-hidden { display: none !important; }

/* 步骤内容面板 */
.beta-body {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 14px;
    text-align: center;
}

.beta-body.is-hidden { display: none; }

.beta-body h3 {
    font-size: 20px;
    font-weight: 700;
}

.beta-guide {
    text-align: left;
    color: var(--md-on-surface-variant);
    font-size: 15px;
    padding-left: 20px;
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.beta-note {
    display: flex;
    align-items: flex-start;
    gap: 8px;
    width: 100%;
    text-align: left;
    font-size: 13px;
    color: var(--md-on-surface-variant);
}

.beta-note .md-icon {
    font-size: 16px;
    flex: none;
    margin-top: 2px;
}

/* 已捕获 UDID 展示条 */
.beta-captured {
    display: flex;
    align-items: center;
    gap: 12px;
    width: 100%;
    padding: 12px 14px;
    border-radius: var(--radius-m);
    background: color-mix(in srgb, var(--md-primary-container) 60%, transparent);
    text-align: left;
}

.beta-captured > .md-icon {
    color: var(--md-primary);
    flex: none;
}

.beta-captured b {
    display: block;
    font-size: 14px;
}

.beta-captured code {
    display: block;
    font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
    font-size: 12px;
    color: var(--md-on-surface-variant);
    word-break: break-all;
}

/* QQ 表单 */
.beta-form {
    display: flex;
    flex-direction: column;
    gap: 12px;
    width: 100%;
    max-width: 360px;
}

.beta-input {
    height: 48px;
    border-radius: var(--radius-m);
    border: 1px solid var(--md-outline-variant);
    background: var(--md-surface);
    color: var(--md-on-surface);
    padding: 0 16px;
    font: inherit;
    font-size: 16px;
    outline: none;
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.beta-input:focus {
    border-color: var(--md-primary);
    box-shadow: 0 0 0 1px var(--md-primary);
}

.beta-msg {
    font-size: 14px;
    min-height: 20px;
    color: var(--md-on-surface-variant);
}

.beta-msg.is-error { color: var(--md-error); }

.beta-msg.is-ok {
    color: var(--md-primary);
    font-weight: 600;
}

/* 完成态 */
.beta-done {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
}

.beta-done-icon {
    width: 72px;
    height: 72px;
    border-radius: 50%;
    background: var(--md-primary-container);
    color: var(--md-on-primary-container);
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.beta-done-icon .md-icon { font-size: 40px; }

.beta-actions {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
    justify-content: center;
    margin-top: 6px;
}

/* 软提示横幅（建议 Safari 打开等） */
.beta-banner {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    width: 100%;
    padding: 10px 14px;
    border-radius: var(--radius-m);
    background: color-mix(in srgb, var(--md-tertiary-container) 60%, transparent);
    color: var(--md-on-tertiary-container);
    font-size: 13px;
}

.beta-banner .md-icon { font-size: 16px; flex: none; }

/* 微信/QQ 内打开时的 Safari 引导遮罩 */
.beta-safari-guide {
    position: fixed;
    inset: 0;
    z-index: 200;
    background: color-mix(in srgb, var(--md-surface) 92%, transparent);
    -webkit-backdrop-filter: blur(8px);
    backdrop-filter: blur(8px);
    display: flex;
    align-items: flex-start;
    justify-content: center;
    padding: 96px 24px 24px;
}

.beta-safari-guide[hidden] { display: none; }

.safari-card {
    max-width: 420px;
    width: 100%;
    background: var(--md-surface-container);
    border-radius: var(--radius-xl);
    box-shadow: var(--elevation-3);
    padding: 28px 24px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    text-align: center;
}

.safari-card .safari-arrow {
    font-size: 40px;
    color: var(--md-primary);
    animation: safari-bounce 1.2s ease-in-out infinite;
}

@keyframes safari-bounce {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-8px); }
}

.safari-card h3 {
    font-size: 20px;
    font-weight: 700;
}

.safari-card p {
    color: var(--md-on-surface-variant);
    font-size: 15px;
}

.safari-steps {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 14px;
    border-radius: var(--radius-full);
    background: var(--md-secondary-container);
    color: var(--md-on-secondary-container);
    font-size: 14px;
    font-weight: 600;
}

/* 回传失败诊断面板：展示 iOS 原始回传内容 */
.beta-diag {
    width: 100%;
    text-align: left;
    border: 1px dashed var(--md-outline-variant);
    border-radius: var(--radius-m);
    padding: 10px 12px;
}

.beta-diag summary {
    cursor: pointer;
    font-size: 13px;
    font-weight: 600;
    color: var(--md-on-surface-variant);
}

.beta-diag pre {
    margin-top: 8px;
    padding: 10px;
    border-radius: 8px;
    background: var(--md-surface-container-low);
    color: var(--md-on-surface-variant);
    font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
    font-size: 11px;
    line-height: 1.6;
    white-space: pre-wrap;
    word-break: break-all;
    max-height: 220px;
    overflow: auto;
}

/* ---------- 学习搭子邀请页（buddy/invite） ---------- */
.invite-code-box {
    width: 100%;
    max-width: 360px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
    padding: 16px 20px;
    border-radius: var(--radius-m);
    border: 1px dashed var(--md-outline-variant);
    background: color-mix(in srgb, var(--md-primary-container) 40%, transparent);
}

.invite-label {
    font-size: 12px;
    font-weight: 600;
    letter-spacing: 2px;
    color: var(--md-on-surface-variant);
}

.invite-code-row {
    display: flex;
    align-items: center;
    gap: 8px;
}

.invite-code {
    font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
    font-size: 34px;
    font-weight: 700;
    letter-spacing: 10px;
    text-indent: 10px;
    color: var(--md-primary);
}

@media (max-width: 480px) {
    .invite-code { font-size: 28px; letter-spacing: 8px; text-indent: 8px; }
}

.invite-hint {
    font-size: 12px;
    color: var(--md-on-surface-variant);
}

/* ---------- 隐私政策页 ---------- */
.policy-wrap {
    max-width: 760px;
    margin: 0 auto;
}

.policy-panel {
    padding: 32px;
    display: flex;
    flex-direction: column;
}

.policy-section {
    margin-top: 22px;
}

.policy-section:first-child { margin-top: 4px; }

.policy-section h3 {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 17px;
    font-weight: 700;
    margin-bottom: 10px;
}

.policy-section h3 .md-icon {
    color: var(--md-primary);
    font-size: 20px;
}

.policy-section p {
    color: var(--md-on-surface-variant);
    font-size: 15px;
    line-height: 1.85;
    margin-bottom: 10px;
}

.policy-section p:last-child { margin-bottom: 0; }

.policy-meta {
    text-align: center;
    font-size: 13px;
    color: var(--md-on-surface-variant);
}

@media (max-width: 480px) {
    .policy-panel { padding: 24px 18px; }
}

/* 回到顶部 FAB 占位（保持页尾不被遮挡） */
.beta-info-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 20px;
    max-width: 640px;
    margin: 24px auto 0;
}