/* ============================================================
   引导页 · front.css
   暗色玻璃拟态 / 单一强调色随主题变量切换
   圆角规则：卡片 18px · 内嵌 12px · 按钮全胶囊
   ============================================================ */

:root {
    --bg-base: #0b0d12;
    --bg-deep: #07080c;
    --ink: #eef1f6;
    --ink-dim: #a8b0c0;
    --ink-faint: #6d7688;
    --line: rgba(255, 255, 255, 0.09);
    --glass: rgba(18, 21, 30, 0.55);
    --accent: #2dd4bf;
    --accent-soft: rgba(45, 212, 191, 0.16);
    --accent-line: rgba(45, 212, 191, 0.34);
    --accent-ink: #04211d;
    --r-card: 18px;
    --r-in: 12px;
    --pill: 999px;
    --shadow: 0 18px 50px -20px rgba(0, 0, 0, 0.75);
    --font: "Outfit", -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
        "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
}

/* ---------- 主题 ---------- */
[data-theme="aurora"] { --accent: #2dd4bf; --accent-soft: rgba(45, 212, 191, 0.16); --accent-line: rgba(45, 212, 191, 0.34); --accent-ink: #04211d; }
[data-theme="amber"]  { --accent: #f59e0b; --accent-soft: rgba(245, 158, 11, 0.16); --accent-line: rgba(245, 158, 11, 0.34); --accent-ink: #2b1a02; }
[data-theme="rose"]   { --accent: #fb7185; --accent-soft: rgba(251, 113, 133, 0.16); --accent-line: rgba(251, 113, 133, 0.34); --accent-ink: #2d0710; }
[data-theme="violet"] { --accent: #a78bfa; --accent-soft: rgba(167, 139, 250, 0.16); --accent-line: rgba(167, 139, 250, 0.34); --accent-ink: #170b33; }
[data-theme="mint"]   { --accent: #4ade80; --accent-soft: rgba(74, 222, 128, 0.16); --accent-line: rgba(74, 222, 128, 0.34); --accent-ink: #052614; }

/* ---------- 卡片强调色（后台可单独指定，缺省随主题） ---------- */
.card.accent-aurora { --card-accent: #2dd4bf; --card-soft: rgba(45, 212, 191, 0.16); --card-line: rgba(45, 212, 191, 0.34); --card-badge-ink: #b8fff4; }
.card.accent-amber  { --card-accent: #f59e0b; --card-soft: rgba(245, 158, 11, 0.16); --card-line: rgba(245, 158, 11, 0.34); --card-badge-ink: #ffe2ad; }
.card.accent-rose   { --card-accent: #fb7185; --card-soft: rgba(251, 113, 133, 0.16); --card-line: rgba(251, 113, 133, 0.34); --card-badge-ink: #ffd0d8; }
.card.accent-violet { --card-accent: #a78bfa; --card-soft: rgba(167, 139, 250, 0.16); --card-line: rgba(167, 139, 250, 0.34); --card-badge-ink: #e0d6ff; }
.card.accent-mint   { --card-accent: #4ade80; --card-soft: rgba(74, 222, 128, 0.16); --card-line: rgba(74, 222, 128, 0.34); --card-badge-ink: #c6ffd9; }

* { box-sizing: border-box; }

/* 必须压过组件里的 display（如 .modal-mask 的 grid），否则 hidden 属性失效 */
[hidden] { display: none !important; }

html { scroll-behavior: smooth; }

body {
    margin: 0;
    /* 纵向弹性布局：内容少时把页脚顶到视口底部 */
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    min-height: 100dvh;
    font-family: var(--font);
    background: var(--bg-deep);
    color: var(--ink);
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
}

a { color: inherit; text-decoration: none; }
button { font-family: inherit; cursor: pointer; }

.ico { width: 22px; height: 22px; display: block; }
.ico-sm { width: 16px; height: 16px; }
.ico-lg { width: 44px; height: 44px; }

/* ============================================================
   背景层
   ============================================================ */
.bg-layer {
    position: fixed;
    inset: 0;
    z-index: -1;
    overflow: hidden;
    background: var(--bg-base);
}

.bg-photo,
.bg-grad {
    position: absolute;
    inset: -4%;
    background-size: cover;
    background-position: center;
    transform: translate3d(0, 0, 0);
    transition: transform 0.6s cubic-bezier(0.16, 1, 0.3, 1);
    will-change: transform;
}

.bg-grad {
    background:
        radial-gradient(60% 50% at 15% 10%, rgba(45, 212, 191, 0.14), transparent 65%),
        radial-gradient(50% 45% at 85% 15%, rgba(99, 102, 241, 0.13), transparent 65%),
        radial-gradient(55% 55% at 50% 110%, rgba(45, 212, 191, 0.1), transparent 70%),
        linear-gradient(165deg, #101420 0%, #0b0d12 45%, #07080c 100%);
}

.bg-veil {
    position: absolute;
    inset: 0;
    background:
        linear-gradient(180deg, rgba(7, 8, 12, 0.62) 0%, rgba(7, 8, 12, 0.78) 55%, rgba(7, 8, 12, 0.92) 100%);
}

.bg-grain {
    position: absolute;
    inset: 0;
    opacity: 0.5;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='140' height='140'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='3'/%3E%3C/filter%3E%3Crect width='140' height='140' filter='url(%23n)' opacity='0.05'/%3E%3C/svg%3E");
}

.orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(90px);
    opacity: 0.4;
    pointer-events: none;
}
.orb-a {
    width: 420px; height: 420px;
    top: -120px; left: -100px;
    background: var(--accent);
    opacity: 0.16;
    animation: drift 22s ease-in-out infinite alternate;
}
.orb-b {
    width: 360px; height: 360px;
    bottom: -140px; right: -80px;
    background: #6366f1;
    opacity: 0.14;
    animation: drift 26s ease-in-out infinite alternate-reverse;
}

@keyframes drift {
    from { transform: translate3d(0, 0, 0) scale(1); }
    to   { transform: translate3d(70px, 50px, 0) scale(1.15); }
}

/* ============================================================
   顶栏
   ============================================================ */
.topbar {
    position: sticky;
    top: 0;
    z-index: 40;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    padding: 14px clamp(16px, 4vw, 40px);
    background: rgba(9, 10, 15, 0.55);
    backdrop-filter: blur(18px) saturate(140%);
    -webkit-backdrop-filter: blur(18px) saturate(140%);
    border-bottom: 1px solid var(--line);
}

.brand {
    display: flex;
    align-items: center;
    gap: 10px;
    min-width: 0;
}

.brand-mark {
    display: grid;
    place-items: center;
    width: 34px;
    height: 34px;
    border-radius: 10px;
    background: var(--accent);
    color: var(--accent-ink);
    font-weight: 700;
    font-size: 16px;
    flex: none;
    box-shadow: 0 6px 18px -6px var(--accent);
}

.brand-logo {
    display: grid;
    place-items: center;
    width: 36px;
    height: 36px;
    flex: none;
}
.brand-logo img {
    max-width: 36px;
    max-height: 36px;
    object-fit: contain;
    border-radius: 9px;
    display: block;
}

.brand-name {
    font-weight: 600;
    font-size: 16px;
    letter-spacing: 0.01em;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.top-actions {
    display: flex;
    align-items: center;
    gap: 8px;
}

.icon-btn {
    position: relative;
    display: grid;
    place-items: center;
    width: 40px;
    height: 40px;
    border-radius: var(--pill);
    border: 1px solid var(--line);
    background: rgba(255, 255, 255, 0.04);
    color: var(--ink-dim);
    transition: color 0.25s, background 0.25s, border-color 0.25s, transform 0.15s;
}
.icon-btn:hover {
    color: var(--accent);
    border-color: var(--accent-soft);
    background: var(--accent-soft);
}
.icon-btn:active { transform: scale(0.94); }

.dot-ping {
    position: absolute;
    top: 9px; right: 10px;
    width: 7px; height: 7px;
    border-radius: 50%;
    background: #fb7185;
    box-shadow: 0 0 0 0 rgba(251, 113, 133, 0.6);
    animation: ping 1.8s ease-out infinite;
}
@keyframes ping {
    0%   { box-shadow: 0 0 0 0 rgba(251, 113, 133, 0.55); }
    70%  { box-shadow: 0 0 0 8px rgba(251, 113, 133, 0); }
    100% { box-shadow: 0 0 0 0 rgba(251, 113, 133, 0); }
}

/* 主题弹层 */
.theme-wrap { position: relative; }

.theme-pop {
    position: absolute;
    top: calc(100% + 10px);
    right: 0;
    width: 178px;
    padding: 12px;
    border-radius: var(--r-in);
    border: 1px solid var(--line);
    background: rgba(14, 16, 23, 0.92);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    box-shadow: var(--shadow);
    transform-origin: top right;
    animation: pop-in 0.22s cubic-bezier(0.16, 1, 0.3, 1);
}
@keyframes pop-in {
    from { opacity: 0; transform: scale(0.92) translateY(-6px); }
    to   { opacity: 1; transform: scale(1) translateY(0); }
}

.theme-pop-t {
    margin: 0 0 8px;
    font-size: 11px;
    letter-spacing: 0.16em;
    text-transform: uppercase;
    color: var(--ink-faint);
}

.theme-list { display: grid; gap: 4px; }

.theme-dot {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 8px 10px;
    border: 1px solid transparent;
    border-radius: 10px;
    background: transparent;
    color: var(--ink-dim);
    font-size: 13.5px;
    text-align: left;
    transition: background 0.2s, border-color 0.2s, color 0.2s;
}
.theme-dot i {
    width: 16px; height: 16px;
    border-radius: 50%;
    background: var(--sw);
    flex: none;
    box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.25);
}
.theme-dot:hover { background: rgba(255, 255, 255, 0.05); color: var(--ink); }
.theme-dot.is-cur {
    border-color: var(--accent-soft);
    background: var(--accent-soft);
    color: var(--ink);
}

/* ============================================================
   Hero
   ============================================================ */
.wrap {
    width: min(1180px, 100% - clamp(32px, 8vw, 80px));
    margin-inline: auto;
    flex: 1; /* 吃掉剩余高度，让页脚始终贴底 */
}

.hero {
    padding: clamp(56px, 9vh, 96px) 0 clamp(36px, 5vh, 56px);
}

.hero-eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 7px 14px;
    border-radius: var(--pill);
    border: 1px solid var(--line);
    background: rgba(255, 255, 255, 0.04);
    font-size: 12.5px;
    letter-spacing: 0.06em;
    color: var(--ink-dim);
}

.live-dot {
    width: 7px; height: 7px;
    border-radius: 50%;
    background: var(--accent);
    animation: blink 2.4s ease-in-out infinite;
}
@keyframes blink { 50% { opacity: 0.35; } }

.hero-title {
    margin: 20px 0 0;
    font-size: clamp(2.4rem, 6vw, 4rem);
    line-height: 1.06;
    letter-spacing: -0.02em;
    font-weight: 700;
    background: linear-gradient(180deg, #fff 25%, rgba(255, 255, 255, 0.68));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    max-width: 16ch;
}

.hero-sub {
    margin: 16px 0 0;
    max-width: 56ch;
    font-size: clamp(15px, 1.6vw, 17.5px);
    line-height: 1.7;
    color: var(--ink-dim);
}

.hero-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 26px;
}

.meta-pill {
    display: inline-flex;
    align-items: center;
    gap: 7px;
    padding: 8px 14px;
    border-radius: var(--pill);
    border: 1px solid var(--line);
    background: rgba(255, 255, 255, 0.035);
    font-size: 13px;
    color: var(--ink-dim);
}
.meta-pill .ico-sm { color: var(--accent); }
.meta-pill b { color: var(--ink); font-variant-numeric: tabular-nums; }

/* ============================================================
   卡片网格
   ============================================================ */
.cards {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(255px, 1fr));
    gap: clamp(14px, 2vw, 20px);
    padding-bottom: clamp(56px, 8vh, 88px);
}

.card {
    position: relative;
    display: flex;
    flex-direction: column;
    --card-accent: var(--accent);
    --card-soft: var(--accent-soft);
    --card-line: var(--accent-line);
    --card-badge-ink: #b8fff4;
    padding: 22px;
    border-radius: var(--r-card);
    border: 1px solid var(--line);
    background: var(--glass);
    backdrop-filter: blur(16px) saturate(130%);
    -webkit-backdrop-filter: blur(16px) saturate(130%);
    box-shadow: var(--shadow);
    overflow: hidden;
    transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1),
                border-color 0.35s, box-shadow 0.35s;
    transform: perspective(900px) rotateX(var(--rx, 0deg)) rotateY(var(--ry, 0deg)) translateY(0);
}

.card:hover {
    border-color: var(--card-line);
    box-shadow: 0 26px 60px -24px rgba(0, 0, 0, 0.85),
                0 0 0 1px var(--card-soft);
    transform: perspective(900px) rotateX(var(--rx, 0deg)) rotateY(var(--ry, 0deg)) translateY(-5px);
}

/* 顶部扫光 */
.card-sheen {
    position: absolute;
    top: 0; left: -60%;
    width: 45%; height: 100%;
    background: linear-gradient(100deg, transparent, var(--card-soft), transparent);
    transform: skewX(-18deg);
    pointer-events: none;
    transition: left 0.7s cubic-bezier(0.16, 1, 0.3, 1);
}
.card:hover .card-sheen { left: 120%; }

.card-top {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 16px;
}

.card-ico-box {
    display: grid;
    place-items: center;
    width: 48px;
    height: 48px;
    border-radius: 14px;
    flex: none;
    background: var(--card-soft);
    border: 1px solid var(--card-line);
    color: var(--card-accent);
    transition: transform 0.35s cubic-bezier(0.34, 1.56, 0.64, 1);
}
.card:hover .card-ico-box { transform: translateY(-3px) rotate(-6deg); }

.card-ico { width: 26px; height: 26px; display: block; }
.card-ico-box img.card-ico {
    width: 30px; height: 30px;
    object-fit: contain;
    border-radius: 7px;
}

.card-badge {
    padding: 4px 10px;
    border-radius: var(--pill);
    background: var(--card-soft);
    border: 1px solid var(--card-line);
    color: var(--card-badge-ink);
    font-size: 11.5px;
    letter-spacing: 0.04em;
}

.card-copy {
    margin-left: auto;
    display: grid;
    place-items: center;
    width: 32px; height: 32px;
    border-radius: 10px;
    border: 1px solid transparent;
    background: transparent;
    color: var(--ink-faint);
    opacity: 0;
    transform: translateX(6px);
    transition: opacity 0.25s, transform 0.25s, background 0.2s, color 0.2s;
}
.card:hover .card-copy,
.card-copy:focus-visible { opacity: 1; transform: translateX(0); }
.card-copy:hover {
    background: rgba(255, 255, 255, 0.07);
    color: var(--ink);
}

.card-title {
    margin: 0;
    font-size: 18.5px;
    font-weight: 600;
    letter-spacing: 0.01em;
}

.card-desc {
    margin: 8px 0 0;
    font-size: 13.8px;
    line-height: 1.65;
    color: var(--ink-dim);
    flex: 1;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

/* 装饰按钮：胶囊 + 渐变 + 箭头位移 */
.card-btn {
    position: relative;
    overflow: hidden;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    margin-top: 18px;
    padding: 11px 18px;
    border-radius: var(--pill);
    background: var(--card-accent);
    color: #0a0c10;
    font-size: 14px;
    font-weight: 600;
    letter-spacing: 0.02em;
    transition: transform 0.2s cubic-bezier(0.16, 1, 0.3, 1), box-shadow 0.25s, filter 0.2s;
    box-shadow: 0 10px 24px -12px var(--card-accent);
}
.card-btn:hover { filter: brightness(1.08); transform: translateY(-2px); box-shadow: 0 16px 30px -12px var(--card-accent); }
.card-btn:active { transform: translateY(0) scale(0.98); }
.btn-arrow { transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1); }
.card-btn:hover .btn-arrow { transform: translateX(4px); }

.card-btn .ripple {
    position: absolute;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.5);
    transform: scale(0);
    pointer-events: none;
    animation: ripple 0.6s ease-out forwards;
}
@keyframes ripple {
    to { transform: scale(3.2); opacity: 0; }
}

/* 空状态 */
.empty-front {
    grid-column: 1 / -1;
    display: grid;
    place-items: center;
    gap: 12px;
    padding: 72px 20px;
    border: 1px dashed var(--line);
    border-radius: var(--r-card);
    color: var(--ink-faint);
    background: rgba(255, 255, 255, 0.02);
}
.empty-front .ico-lg { color: var(--accent); }
.empty-front p { margin: 0; font-size: 15px; }

/* ============================================================
   Footer
   ============================================================ */
.foot {
    border-top: 1px solid var(--line);
    background: rgba(7, 8, 12, 0.6);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
}
.foot-in {
    width: min(1180px, 100% - clamp(32px, 8vw, 80px));
    margin-inline: auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 10px;
    padding: 20px 0;
    font-size: 13px;
    color: var(--ink-faint);
}
.beian:hover { color: var(--accent); }

/* ============================================================
   公告弹窗
   ============================================================ */
.modal-mask {
    position: fixed;
    inset: 0;
    z-index: 90;
    display: grid;
    place-items: center;
    padding: 20px;
    background: rgba(4, 5, 8, 0.66);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    animation: fade-in 0.25s ease;
}
@keyframes fade-in { from { opacity: 0; } }

.modal {
    width: min(430px, 100%);
    padding: 30px 28px 26px;
    border-radius: var(--r-card);
    border: 1px solid var(--line);
    background: linear-gradient(180deg, rgba(20, 23, 32, 0.98), rgba(13, 15, 21, 0.98));
    box-shadow: 0 40px 80px -30px rgba(0, 0, 0, 0.9);
    text-align: center;
    animation: modal-in 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}
@keyframes modal-in {
    from { opacity: 0; transform: translateY(18px) scale(0.96); }
    to   { opacity: 1; transform: none; }
}

.modal-ico {
    display: grid;
    place-items: center;
    width: 54px; height: 54px;
    margin: 0 auto 16px;
    border-radius: 16px;
    background: var(--accent-soft);
    border: 1px solid var(--accent-line);
    color: var(--accent);
}

.modal-title { margin: 0; font-size: 20px; font-weight: 650; }

.modal-body {
    margin: 12px 0 22px;
    font-size: 14.5px;
    line-height: 1.8;
    color: var(--ink-dim);
    text-align: left;
    white-space: pre-wrap;
    max-height: 40vh;
    overflow-y: auto;
}

.modal-btn {
    width: 100%;
    padding: 13px;
    border: none;
    border-radius: var(--pill);
    background: var(--accent);
    color: var(--accent-ink);
    font-size: 15px;
    font-weight: 650;
    transition: filter 0.2s, transform 0.15s;
}
.modal-btn:hover { filter: brightness(1.08); }
.modal-btn:active { transform: scale(0.98); }

/* ============================================================
   Toast
   ============================================================ */
.toast {
    position: fixed;
    left: 50%;
    bottom: 34px;
    z-index: 95;
    transform: translate(-50%, 20px);
    padding: 11px 20px;
    border-radius: var(--pill);
    background: rgba(18, 21, 30, 0.95);
    border: 1px solid var(--accent-soft);
    color: var(--ink);
    font-size: 14px;
    box-shadow: var(--shadow);
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s, transform 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    display: flex;
    align-items: center;
    gap: 8px;
}
.toast.is-show { opacity: 1; transform: translate(-50%, 0); }

/* ============================================================
   入场动画
   ============================================================ */
.reveal {
    opacity: 0;
    transform: translateY(22px);
    transition: opacity 0.7s cubic-bezier(0.16, 1, 0.3, 1),
                transform 0.7s cubic-bezier(0.16, 1, 0.3, 1);
    transition-delay: calc(var(--i, 0) * 70ms);
}
.reveal.is-in { opacity: 1; transform: none; }

/* ============================================================
   响应式
   ============================================================ */
@media (max-width: 767px) {
    .topbar { padding-block: 12px; }
    .brand-name { font-size: 15px; }

    /* Hero 收紧，把纵向空间让给卡片 */
    .hero { padding: 34px 0 26px; }
    .hero-eyebrow { padding: 6px 12px; font-size: 12px; }
    .hero-title { max-width: none; margin-top: 14px; font-size: clamp(1.9rem, 8vw, 2.5rem); }
    .hero-sub { margin-top: 10px; font-size: 14.5px; line-height: 1.6; }
    .hero-meta { margin-top: 16px; gap: 8px; }
    .meta-pill { padding: 6px 11px; font-size: 12px; gap: 6px; }
    .meta-pill .ico-sm { width: 14px; height: 14px; }

    /* 卡片：紧凑化，提升精致度 */
    .cards {
        grid-template-columns: 1fr;
        gap: 12px;
        padding-bottom: 44px;
    }
    .card {
        padding: 16px;
        border-radius: 16px;
        backdrop-filter: blur(12px) saturate(130%);
        -webkit-backdrop-filter: blur(12px) saturate(130%);
        box-shadow: 0 12px 34px -18px rgba(0, 0, 0, 0.8);
    }
    .card:hover { transform: none; }
    .card-top { margin-bottom: 12px; gap: 8px; }
    .card-ico-box { width: 40px; height: 40px; border-radius: 12px; }
    .card:hover .card-ico-box { transform: none; }
    .card-ico { width: 22px; height: 22px; }
    .card-ico-box img.card-ico { width: 25px; height: 25px; border-radius: 6px; }
    .card-badge { padding: 3px 9px; font-size: 11px; }
    .card-copy { width: 30px; height: 30px; opacity: 1; transform: none; }
    .card-title { font-size: 16.5px; line-height: 1.3; }
    .card-desc { margin-top: 6px; font-size: 13px; line-height: 1.55; }
    .card-btn {
        margin-top: 14px;
        padding: 10px 16px;
        font-size: 13.5px;
        box-shadow: 0 8px 18px -12px var(--card-accent);
    }
    .empty-front { padding: 52px 16px; }

    .foot-in { padding: 16px 0; font-size: 12.5px; justify-content: center; text-align: center; }
}

@media (max-width: 400px) {
    .top-actions { gap: 6px; }
    .icon-btn { width: 37px; height: 37px; }
}

/* ============================================================
   无障碍：减少动态
   ============================================================ */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    .reveal { opacity: 1; transform: none; }
    .card { transform: none !important; }
    html { scroll-behavior: auto; }
}