/* ═══ SAVES 社区 6.0 前台 · 鎏金竞技场（测试版 /preview6） ═══
   论坛专属视觉：深蓝黑夜场 + 鎏金单强调色 + 指针追光 / 磁吸 / 倾斜交互。
   与 6.0 客户端（石墨曜石 + 电光蓝极简）刻意区分。
   圆角制度：容器 16px / 交互件全圆角。数字一律 mono。 */

:root {
    /* 夜场三阶（蓝黑，非客户端石墨） */
    --bg: #0b0e14;
    --surface: #111624;
    --raised: #182031;
    --ink: #f2f4f8;
    --ink-mid: #9aa4b5;
    --ink-dim: #66707f;
    --line: rgba(148, 176, 224, 0.1);
    --line-strong: rgba(148, 176, 224, 0.2);
    --fill: rgba(148, 176, 224, 0.05);
    --fill-hover: rgba(148, 176, 224, 0.09);

    /* 唯一强调色：鎏金（荣誉 / 段位 / 会员） */
    --gold: #e8b85c;
    --gold-ink: #f0cd8a;
    --gold-deep: #b9883a;
    --gold-soft: rgba(232, 184, 92, 0.1);
    --gold-line: rgba(232, 184, 92, 0.34);

    --radius: 16px;
    --font-sans: 'Noto Sans SC', 'Segoe UI', 'Microsoft YaHei UI', system-ui, sans-serif;
    --font-mono: 'IBM Plex Mono', 'Cascadia Code', Consolas, monospace;
    --ease: cubic-bezier(0.16, 1, 0.3, 1);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body.forum6 {
    margin: 0;
    min-height: 100dvh;
    background: var(--bg);
    color: var(--ink);
    font-family: var(--font-sans);
    font-size: 15px;
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
    text-rendering: optimizeLegibility;
    overflow-x: hidden;
}

/* 夜场环境光：顶部金晕 + 侧翼冷蓝，静态低透明 */
body.forum6::before {
    content: '';
    position: fixed;
    inset: 0;
    z-index: 0;
    pointer-events: none;
    background:
        radial-gradient(640px 300px at 72% -8%, rgba(232, 184, 92, 0.07), transparent 66%),
        radial-gradient(900px 480px at -12% 12%, rgba(84, 120, 200, 0.08), transparent 62%);
}

body.forum6 > *:not(.f6-boot):not(.f6-edge-glow) { position: relative; z-index: 1; }

body.forum6 a { color: inherit; text-decoration: none; }

.f6-wrap {
    max-width: 1140px;
    margin: 0 auto;
    padding: 0 24px;
}

::selection { background: rgba(232, 184, 92, 0.32); }

/* ── 导航：66px，滚动后凝实 ── */
.f6-nav {
    position: sticky;
    top: 0;
    z-index: 50;
    border-bottom: 1px solid transparent;
    transition: border-color 0.3s var(--ease), background 0.3s var(--ease);
}

.f6-nav.is-solid {
    background: var(--bg);
    background: color-mix(in srgb, var(--bg) 88%, transparent);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom-color: var(--line);
}

.f6-nav-inner {
    display: flex;
    align-items: center;
    gap: 26px;
    height: 66px;
}

.f6-brand { display: flex; align-items: center; gap: 11px; flex-shrink: 0; }

.f6-brand img { width: 30px; height: 30px; border-radius: 9px; display: block; }

.f6-wordmark {
    font-size: 15px;
    font-weight: 800;
    letter-spacing: 0.16em;
}

.f6-wordmark .six {
    color: var(--gold);
    font-size: 11px;
    font-weight: 800;
    vertical-align: super;
    margin-left: 1px;
}

.f6-nav-links { display: flex; gap: 2px; }

.f6-nav-link {
    position: relative;
    padding: 6px 13px;
    font-size: 13.5px;
    color: var(--ink-mid);
    border-radius: 999px;
    transition: color 0.18s;
}

.f6-nav-link::after {
    content: '';
    position: absolute;
    left: 13px;
    right: 13px;
    bottom: 2px;
    height: 1.5px;
    border-radius: 999px;
    background: var(--gold);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.24s var(--ease);
}

.f6-nav-link:hover { color: var(--ink); }
.f6-nav-link:hover::after { transform: scaleX(1); }

.f6-search { margin-left: auto; }

.f6-search input {
    width: 200px;
    height: 35px;
    padding: 0 15px;
    border: 1px solid var(--line);
    border-radius: 999px;
    background: var(--fill);
    color: var(--ink);
    font-size: 13px;
    font-family: inherit;
    outline: none;
    transition: border-color 0.2s, width 0.28s var(--ease);
}

.f6-search input::placeholder { color: var(--ink-dim); }
.f6-search input:focus { border-color: var(--gold-line); width: 240px; }

.f6-nav-actions { display: flex; align-items: center; gap: 10px; flex-shrink: 0; }

.f6-login {
    height: 35px;
    display: inline-flex;
    align-items: center;
    padding: 0 17px;
    border-radius: 999px;
    border: 1px solid var(--gold-line);
    color: var(--gold-ink);
    font-size: 13px;
    font-weight: 600;
    transition: background 0.18s, transform 0.12s;
}

.f6-login:hover { background: var(--gold-soft); }
.f6-login:active { transform: scale(0.96); }

.f6-logout {
    height: 35px;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 0 14px;
    border-radius: 999px;
    border: 1px solid var(--line-strong);
    background: transparent;
    color: var(--ink-mid);
    font-family: var(--font-sans);
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
    transition: color 0.18s, border-color 0.18s, background 0.18s, transform 0.12s;
}

.f6-logout svg { width: 15px; height: 15px; }
.f6-logout:hover { color: #f28b8b; border-color: rgba(242, 139, 139, 0.45); background: rgba(242, 139, 139, 0.08); }
.f6-logout:active { transform: scale(0.96); }

/* ── 公告条 ── */
.f6-notice {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 0;
    border-bottom: 1px solid var(--line);
    font-size: 12.5px;
    color: var(--ink-mid);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.f6-notice strong {
    flex-shrink: 0;
    color: var(--gold-ink);
    font-weight: 700;
    letter-spacing: 0.06em;
}

/* ── Hero：编辑式大字重，非对称 7/5 ── */
.f6-hero {
    display: grid;
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 52px;
    align-items: center;
    padding: 84px 0 72px;
}

.f6-hero h1 {
    margin: 0 0 20px;
    font-size: clamp(38px, 5.4vw, 62px);
    font-weight: 800;
    line-height: 1.12;
    letter-spacing: -0.025em;
}

/* 鎏金词：唯一的渐变时刻，锁定单词级 */
.f6-gold-word {
    background: linear-gradient(115deg, var(--gold-ink) 12%, var(--gold) 46%, var(--gold-deep) 88%);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.f6-hero-sub {
    margin: 0 0 32px;
    max-width: 27em;
    font-size: 15.5px;
    color: var(--ink-mid);
}

.f6-hero-ctas { display: flex; gap: 14px; flex-wrap: wrap; }

.f6-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    height: 44px;
    padding: 0 24px;
    border-radius: 999px;
    font-size: 14px;
    font-weight: 700;
    white-space: nowrap;
    cursor: pointer;
    transition: transform 0.16s var(--ease), background 0.2s, border-color 0.2s, box-shadow 0.2s;
    will-change: transform;
}

.f6-btn:active { transform: scale(0.96); }

.f6-btn-primary {
    background: var(--gold);
    color: #14100a;
    border: 1px solid transparent;
    box-shadow: 0 6px 26px -10px rgba(232, 184, 92, 0.55);
}

.f6-btn-primary:hover {
    background: var(--gold-ink);
    box-shadow: 0 10px 32px -10px rgba(232, 184, 92, 0.65);
}

.f6-btn-ghost {
    background: transparent;
    color: var(--ink);
    border: 1px solid var(--line-strong);
}

.f6-btn-ghost:hover { background: var(--fill-hover); }

/* 右列：战绩风数据面板（金框 + 追光） */
.f6-hero-panel {
    position: relative;
    padding: 30px 30px 26px;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: var(--surface);
    overflow: hidden;
}

.f6-hero-panel::before {
    content: '';
    position: absolute;
    inset: 0;
    pointer-events: none;
    background: radial-gradient(420px 260px at var(--mx, 70%) var(--my, 0%), rgba(232, 184, 92, 0.1), transparent 62%);
    opacity: 0;
    transition: opacity 0.3s;
}

.f6-hero-panel:hover::before { opacity: 1; }

.f6-hero-panel-title {
    font-size: 12.5px;
    font-weight: 700;
    letter-spacing: 0.14em;
    color: var(--gold-ink);
    margin-bottom: 20px;
}

.f6-hero-stats { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 22px 18px; }

.f6-stat-num {
    font-family: var(--font-mono);
    font-size: 32px;
    font-weight: 600;
    line-height: 1;
    letter-spacing: -0.01em;
    font-variant-numeric: tabular-nums;
}

.f6-stat-label { margin-top: 7px; font-size: 12.5px; color: var(--ink-dim); }

.f6-mock-note {
    margin-top: 20px;
    display: inline-block;
    font-size: 11.5px;
    color: var(--ink-dim);
    border: 1px dashed var(--line-strong);
    border-radius: 999px;
    padding: 2px 11px;
}

/* ── 区块通用 ── */
.f6-section { padding: 64px 0; }

.f6-section + .f6-section { border-top: 1px solid var(--line); }

.f6-section-head {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    gap: 16px;
    margin-bottom: 30px;
}

.f6-section-head h2 {
    margin: 0;
    font-size: 26px;
    font-weight: 800;
    letter-spacing: -0.015em;
}

.f6-section-link { font-size: 13px; color: var(--ink-mid); transition: color 0.18s; }

.f6-section-link:hover { color: var(--gold-ink); }

/* ── 版块：双列卡片，指针追光 + 底缘金线扫过 ── */
.f6-forum-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 14px;
}

.f6-forum-card {
    position: relative;
    display: flex;
    flex-direction: column;
    gap: 8px;
    padding: 24px 24px 20px;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: var(--surface);
    overflow: hidden;
    transition: border-color 0.22s var(--ease), transform 0.22s var(--ease);
}

.f6-forum-card::before {
    content: '';
    position: absolute;
    inset: 0;
    pointer-events: none;
    background: radial-gradient(360px 200px at var(--mx, 50%) var(--my, 0%), rgba(232, 184, 92, 0.09), transparent 60%);
    opacity: 0;
    transition: opacity 0.3s;
}

.f6-forum-card::after {
    content: '';
    position: absolute;
    left: 0;
    right: 0;
    bottom: 0;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--gold), transparent);
    transform: scaleX(0);
    transition: transform 0.3s var(--ease);
}

.f6-forum-card:hover { border-color: var(--line-strong); transform: translateY(-3px); }
.f6-forum-card:hover::before { opacity: 1; }
.f6-forum-card:hover::after { transform: scaleX(1); }

.f6-forum-card h3 { margin: 0; font-size: 17px; font-weight: 700; transition: color 0.2s; }

.f6-forum-card:hover h3 { color: var(--gold-ink); }

.f6-forum-card p { margin: 0; flex: 1; font-size: 13px; color: var(--ink-dim); }

.f6-forum-count {
    font-family: var(--font-mono);
    font-size: 12.5px;
    color: var(--ink-mid);
    font-variant-numeric: tabular-nums;
}

/* -- Tiers: rotating 3D showcase. One tier holds the spotlight; the rest wait
      in the wings. Arrows / tabs / side-cards / swipe all rotate the stage. -- */
.f6-section-sub {
    margin: 8px 0 0;
    font-size: 13px;
    color: var(--ink-dim);
    letter-spacing: 0.02em;
}

.f6-tier-stage {
    position: relative;
    height: 520px;
    perspective: 1300px;
    touch-action: pan-y;
}

.f6-tier-scene {
    position: absolute;
    inset: 0;
    transform-style: preserve-3d;
}

.f6-tier {
    position: absolute;
    left: 50%;
    top: 50%;
    width: min(400px, 86vw);
    display: flex;
    flex-direction: column;
    gap: 14px;
    padding: 27px 25px 21px;
    transform-style: preserve-3d;
    transform: translate(-50%, -50%);
    transition: transform 0.65s cubic-bezier(0.22, 1, 0.36, 1), opacity 0.5s ease, filter 0.5s ease;
    will-change: transform, opacity;
}

.f6-tier.is-front {
    transform: translate(-50%, -50%) rotateX(var(--rx, 0deg)) rotateY(var(--ry, 0deg));
    z-index: 4;
    opacity: 1;
}

.f6-tier.is-front.is-live { transition-duration: 0.09s, 0.5s, 0.5s; }

.f6-tier.is-left {
    transform: translate(-118%, -50%) rotateY(36deg) scale(0.85);
    z-index: 2;
    opacity: 0.42;
    filter: blur(1px) saturate(0.75);
    cursor: pointer;
}

.f6-tier.is-right {
    transform: translate(18%, -50%) rotateY(-36deg) scale(0.85);
    z-index: 2;
    opacity: 0.42;
    filter: blur(1px) saturate(0.75);
    cursor: pointer;
}

.f6-tier.is-left:hover,
.f6-tier.is-right:hover { opacity: 0.68; filter: blur(0) saturate(0.9); }

.f6-tier.is-back {
    transform: translate(-50%, -54%) scale(0.7);
    z-index: 1;
    opacity: 0;
    pointer-events: none;
}

/* Skin: clipped backdrop carrying the orbiting light and unique wash */
.f6-tier-skin {
    position: absolute;
    inset: 0;
    border-radius: var(--radius);
    overflow: hidden;
    background: var(--line);
    transform: translateZ(0);
}

.f6-tier.is-front .f6-tier-skin {
    box-shadow: 0 26px 56px -26px rgba(0, 0, 0, 0.6);
}

/* Orbiting light: one thin bright arc circling the frame */
.f6-tier-halo {
    position: absolute;
    inset: -60%;
    background: conic-gradient(from 0deg,
        transparent 0deg, transparent 84deg,
        var(--halo) 108deg, transparent 132deg, transparent 360deg);
    animation: f6HaloSpin var(--halo-speed, 9s) linear infinite;
    opacity: 0.9;
}

@keyframes f6HaloSpin {
    to { transform: rotate(360deg); }
}

/* Cover sits 1px inside so the halo reads as a travelling border light */
.f6-tier-cover {
    position: absolute;
    inset: 1px;
    border-radius: calc(var(--radius) - 1px);
    overflow: hidden;
    background: var(--tier-wash, var(--surface));
}

/* Rank accent along the top edge */
.f6-tier-cover::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--tier-accent, var(--line-strong));
}

/* Sheen tracking the pointer */
.f6-tier-cover::after {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(340px 240px at var(--mx, 50%) var(--my, 0%), var(--sheen, rgba(232, 184, 92, 0.09)), transparent 62%);
    opacity: 0;
    transition: opacity 0.3s;
}

.f6-tier.is-front:hover .f6-tier-cover::after { opacity: 1; }

/* Signature numeral watermark */
.f6-tier-emblem {
    position: absolute;
    right: 6px;
    bottom: -26px;
    font-family: Georgia, 'Times New Roman', serif;
    font-style: normal;
    font-size: 138px;
    line-height: 1;
    font-weight: 700;
    color: var(--emblem, rgba(148, 163, 184, 0.07));
    user-select: none;
}

/* --- Four identities --- */
.f6-tier--trial {
    --halo: rgba(196, 208, 224, 0.5);
    --halo-speed: 12s;
    --tier-accent: rgba(148, 163, 184, 0.3);
    --sheen: rgba(196, 208, 224, 0.07);
    --emblem: rgba(148, 163, 184, 0.07);
}

.f6-tier--std {
    --halo: rgba(122, 168, 224, 0.6);
    --halo-speed: 10s;
    --tier-accent: rgba(122, 168, 224, 0.5);
    --sheen: rgba(122, 168, 224, 0.08);
    --emblem: rgba(122, 168, 224, 0.08);
    --tier-wash: radial-gradient(circle at 12% -12%, rgba(122, 168, 224, 0.07), transparent 46%), var(--surface);
}

.f6-tier--vip {
    --halo: rgba(232, 184, 92, 0.75);
    --halo-speed: 8s;
    --tier-accent: linear-gradient(90deg, rgba(232, 184, 92, 0.7), rgba(232, 184, 92, 0.15));
    --sheen: rgba(232, 184, 92, 0.1);
    --emblem: rgba(232, 184, 92, 0.09);
    --tier-wash: radial-gradient(circle at 88% -14%, rgba(232, 184, 92, 0.09), transparent 50%), var(--raised);
}

.f6-tier--svip {
    --halo-speed: 6s;
    --tier-accent: linear-gradient(90deg, #c9942f, #f6d492, #c9942f);
    --sheen: rgba(246, 212, 146, 0.13);
    --emblem: rgba(232, 184, 92, 0.12);
    --tier-wash: radial-gradient(circle at 80% -20%, rgba(232, 184, 92, 0.13), transparent 55%), var(--surface);
}

/* SVIP: twin counter-arcs, brighter, faster */
.f6-tier--svip .f6-tier-halo {
    background: conic-gradient(from 0deg,
        transparent 0deg, transparent 70deg,
        rgba(246, 212, 146, 0.95) 100deg, transparent 130deg,
        transparent 250deg,
        rgba(232, 184, 92, 0.6) 280deg, transparent 310deg, transparent 360deg);
}

.f6-tier--svip .f6-tier-skin { background: var(--gold-line); }

.f6-tier--svip.is-front .f6-tier-skin {
    box-shadow: 0 26px 58px -24px rgba(232, 184, 92, 0.42);
}

/* Mystery tier: capabilities shown as redacted bars, like a sealed dossier */
.f6-caps--masked li.is-mask {
    padding: 8.5px 0;
}

.f6-caps--masked li.is-mask::before {
    content: '?';
    color: rgba(232, 184, 92, 0.5);
    font-family: var(--font-mono);
    font-weight: 600;
}

.f6-caps--masked li.is-mask i {
    display: block;
    width: var(--wb, 50%);
    height: 8px;
    border-radius: 4px;
    background: linear-gradient(90deg, rgba(232, 184, 92, 0.16), rgba(148, 163, 184, 0.06));
}

/* --- Content floats at distinct depths for parallax --- */
.f6-tier-head {
    position: relative;
    display: flex;
    flex-direction: column;
    transform: translateZ(36px);
}

.f6-tier-step {
    font-family: var(--font-mono);
    font-size: 10.5px;
    letter-spacing: 0.18em;
    color: var(--ink-dim);
}

.f6-tier--svip .f6-tier-step { color: var(--gold-ink); }

.f6-tier-name { margin: 8px 0 0; font-size: 17px; font-weight: 800; letter-spacing: 0.01em; }

.f6-tier--vip .f6-tier-name,
.f6-tier--svip .f6-tier-name { color: var(--gold-ink); }

.f6-tier-gain { margin: 5px 0 0; font-size: 12px; color: var(--ink-dim); }

.f6-tier-badge {
    position: absolute;
    top: 16px;
    right: 16px;
    font-size: 10.5px;
    letter-spacing: 0.1em;
    color: var(--gold-ink);
    border: 1px solid var(--gold-line);
    border-radius: 999px;
    padding: 3px 10px;
    background: rgba(232, 184, 92, 0.08);
    transform: translateZ(44px);
}

.f6-tier-desc {
    position: relative;
    margin: 0;
    font-size: 12.5px;
    line-height: 1.7;
    color: var(--ink-mid);
    transform: translateZ(24px);
}

/* Capability matrix: gold check = owned, dash = locked */
.f6-caps {
    position: relative;
    margin: auto 0 0;
    padding: 12px 0 0;
    list-style: none;
    border-top: 1px solid var(--line);
    transform: translateZ(16px);
}

.f6-caps li {
    display: flex;
    align-items: center;
    gap: 9px;
    padding: 5px 0;
    font-size: 12.5px;
    color: var(--ink-mid);
}

.f6-caps li::before {
    content: '\2713';
    width: 14px;
    flex: none;
    text-align: center;
    font-size: 11px;
    font-weight: 700;
    color: var(--gold);
}

.f6-caps li.is-off { color: var(--ink-dim); opacity: 0.5; }

.f6-caps li.is-off::before { content: '\2013'; color: var(--ink-dim); font-weight: 400; }

/* --- Stage navigation: quiet text tabs with a gold tick, frameless arrows --- */
.f6-tier-nav {
    display: flex;
    align-items: center;
    justify-content: center;
    flex-wrap: wrap;
    gap: 2px 22px;
    margin-top: 24px;
}

.f6-tier-arrow {
    padding: 6px 8px;
    border: 0;
    background: transparent;
    color: var(--ink-dim);
    font-size: 22px;
    line-height: 1;
    cursor: pointer;
    transition: color 0.2s, transform 0.2s;
}

.f6-tier-arrow:hover { color: var(--gold-ink); }

#f6TierPrev:hover { transform: translateX(-2px); }
#f6TierNext:hover { transform: translateX(2px); }

.f6-tier-tab {
    position: relative;
    padding: 8px 2px 14px;
    border: 0;
    background: transparent;
    font-family: var(--font-mono);
    font-size: 11px;
    letter-spacing: 0.1em;
    color: var(--ink-dim);
    cursor: pointer;
    transition: color 0.2s;
}

.f6-tier-tab::after {
    content: '';
    position: absolute;
    left: 50%;
    bottom: 6px;
    width: 18px;
    height: 2px;
    border-radius: 2px;
    background: var(--gold);
    transform: translateX(-50%) scaleX(0);
    transition: transform 0.28s var(--ease);
}

.f6-tier-tab:hover { color: var(--ink-mid); }

.f6-tier-tab.is-active { color: var(--gold-ink); }

.f6-tier-tab.is-active::after { transform: translateX(-50%) scaleX(1); }

@media (max-width: 900px) {
    .f6-tier.is-left { transform: translate(-136%, -50%) rotateY(38deg) scale(0.82); opacity: 0.25; }
    .f6-tier.is-right { transform: translate(36%, -50%) rotateY(-38deg) scale(0.82); opacity: 0.25; }
}

@media (max-width: 640px) {
    .f6-tier-stage { height: 560px; }
    .f6-tier.is-left, .f6-tier.is-right { opacity: 0; pointer-events: none; }
}

@media (prefers-reduced-motion: reduce) {
    .f6-tier { transition: none; }
    .f6-tier-halo { animation: none; opacity: 0.35; }
}

/* ── 热帖：荣誉榜，金位次 + 标题划线 ── */
.f6-hot-list { display: grid; }

.f6-hot-row {
    display: grid;
    grid-template-columns: 44px minmax(0, 1fr) auto;
    gap: 18px;
    align-items: center;
    padding: 17px 16px;
    margin: 0 -16px;
    border-radius: var(--radius);
    transition: background 0.2s var(--ease);
}

.f6-hot-row:not(:last-child) { border-bottom: 1px solid var(--line); }

.f6-hot-row:hover { background: var(--fill); }

.f6-hot-rank {
    font-family: var(--font-mono);
    font-size: 17px;
    font-weight: 600;
    color: var(--ink-dim);
    font-variant-numeric: tabular-nums;
    transition: transform 0.22s var(--ease);
}

.f6-hot-row:nth-child(1) .f6-hot-rank { color: var(--gold); }
.f6-hot-row:nth-child(2) .f6-hot-rank { color: var(--gold-ink); }
.f6-hot-row:nth-child(3) .f6-hot-rank { color: var(--gold-deep); }

.f6-hot-row:hover .f6-hot-rank { transform: translateX(3px); }

.f6-hot-title {
    display: inline;
    font-size: 14.5px;
    font-weight: 600;
    background-image: linear-gradient(var(--gold-ink), var(--gold-ink));
    background-repeat: no-repeat;
    background-size: 0% 1.5px;
    background-position: 0 100%;
    transition: background-size 0.3s var(--ease), color 0.2s;
}

.f6-hot-row:hover .f6-hot-title { color: var(--gold-ink); background-size: 100% 1.5px; }

.f6-hot-titlebox { min-width: 0; }

.f6-hot-titlebox > div:first-child {
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.f6-hot-meta {
    margin-top: 3px;
    font-size: 12px;
    color: var(--ink-dim);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.f6-hot-stats {
    font-family: var(--font-mono);
    font-size: 12.5px;
    color: var(--ink-mid);
    font-variant-numeric: tabular-nums;
    white-space: nowrap;
}

/* ── 页脚 ── */
.f6-footer {
    border-top: 1px solid var(--line);
    padding: 32px 0 44px;
    display: flex;
    justify-content: space-between;
    gap: 16px;
    font-size: 12.5px;
    color: var(--ink-dim);
}

.f6-footer a:hover { color: var(--gold-ink); }

/* === Boot sequence: engraved nameplate. Typography-first, one gold hairline, one pass of light. === */

.f6-boot {
    position: fixed;
    inset: 0;
    z-index: 200;
    background: var(--bg);
    color: var(--ink);
    cursor: pointer;
    overflow: hidden;
    transform: scale(1);
    transition:
        opacity 0.65s cubic-bezier(0.4, 0, 0.2, 1),
        transform 0.65s cubic-bezier(0.4, 0, 0.2, 1),
        visibility 0.65s;
}

.f6-boot.is-done {
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transform: scale(1.02);
}

/* Still, quiet field: vignette + film grain, barely-there warmth */
.f6-boot__veil {
    position: absolute;
    inset: 0;
    pointer-events: none;
    background:
        radial-gradient(ellipse 110% 80% at 50% 46%, rgba(232, 184, 92, 0.035) 0%, transparent 55%),
        radial-gradient(ellipse 140% 120% at 50% 50%, transparent 60%, rgba(0, 0, 0, 0.5) 100%);
}

.f6-boot__veil::after {
    content: '';
    position: absolute;
    inset: 0;
    opacity: 0.04;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.6'/%3E%3C/svg%3E");
    background-size: 160px 160px;
}

.f6-boot__anchor {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: min(620px, 92vw);
    display: flex;
    flex-direction: column;
    align-items: center;
    will-change: transform, opacity, filter;
}

/* Exit: the composition takes one quiet breath upward and dissolves */
.f6-boot--exit .f6-boot__anchor {
    animation: f6AnchorExit 0.55s cubic-bezier(0.4, 0, 0.2, 1) forwards;
}

@keyframes f6AnchorExit {
    0% { opacity: 1; transform: translate(-50%, -50%); filter: blur(0); }
    100% { opacity: 0; transform: translate(-50%, -54%); filter: blur(3px); }
}

/* Wordmark: warm ivory, wide tracking, weight 500 - the restraint of an engraving */
.f6-boot__word {
    display: flex;
    justify-content: center;
    margin: 0;
    font-size: clamp(34px, 6.6vw, 58px);
    font-weight: 500;
    letter-spacing: 0.3em;
    text-indent: 0.3em;
    line-height: 1;
    color: rgba(243, 240, 233, 0.95);
    user-select: none;
}

.f6-boot__char {
    position: relative;
    display: inline-block;
    opacity: 0;
    transform: translateY(14px);
    filter: blur(6px);
    will-change: transform, opacity, filter;
}

/* Typeset left to right, each glyph settling like set type */
.f6-boot--reveal .f6-boot__char {
    animation: f6CharIn 0.75s cubic-bezier(0.19, 1, 0.22, 1) forwards;
    animation-delay: calc(0.05s + var(--i) * 0.06s);
}

@keyframes f6CharIn {
    to { opacity: 1; transform: none; filter: none; }
}

/* The single gold accent: a small 6, placed with care */
.f6-boot__six {
    position: absolute;
    top: -0.28em;
    right: -0.02em;
    font-family: var(--font-mono);
    font-size: 0.42em;
    font-weight: 600;
    letter-spacing: 0;
    text-indent: 0;
    line-height: 1;
    color: var(--gold);
    text-shadow: 0 0 18px rgba(232, 184, 92, 0.35);
    opacity: 0;
    transform: scale(0.9);
}

.f6-boot--reveal .f6-boot__six {
    animation: f6SixIn 0.55s cubic-bezier(0.19, 1, 0.22, 1) 0.6s forwards;
}

@keyframes f6SixIn {
    to { opacity: 1; transform: none; }
}

/* Gold hairline: draws from center, then carries one pass of light */
.f6-boot__rule {
    position: relative;
    width: min(300px, 60vw);
    height: 1px;
    margin-top: clamp(24px, 4.2vw, 34px);
    overflow: hidden;
    background: linear-gradient(90deg, transparent, rgba(232, 184, 92, 0.7) 20%, rgba(232, 184, 92, 0.7) 80%, transparent);
    transform: scaleX(0);
}

.f6-boot--reveal .f6-boot__rule {
    animation: f6RuleIn 0.9s cubic-bezier(0.22, 1, 0.36, 1) 0.35s forwards;
}

@keyframes f6RuleIn {
    to { transform: scaleX(1); }
}

.f6-boot__rule-light {
    position: absolute;
    top: 0;
    left: 0;
    width: 26%;
    height: 100%;
    opacity: 0;
    transform: translateX(-100%);
    background: linear-gradient(90deg, transparent, rgba(255, 247, 226, 0.95) 50%, transparent);
}

.f6-boot--charge .f6-boot__rule-light {
    animation: f6RulePass 1.05s cubic-bezier(0.4, 0, 0.2, 1) 0.05s forwards;
}

@keyframes f6RulePass {
    0% { opacity: 0; transform: translateX(-100%); }
    12% { opacity: 1; }
    88% { opacity: 1; }
    100% { opacity: 0; transform: translateX(385%); }
}

/* Understated caption */
.f6-boot__sub {
    margin: 16px 0 0;
    text-align: center;
    font-family: var(--font-mono);
    font-size: clamp(9px, 1.3vw, 10px);
    letter-spacing: 0.34em;
    text-indent: 0.34em;
    text-transform: uppercase;
    color: rgba(243, 240, 233, 0.32);
    opacity: 0;
    transform: translateY(6px);
}

.f6-boot--charge .f6-boot__sub {
    animation: f6SubIn 0.6s cubic-bezier(0.19, 1, 0.22, 1) 0.25s forwards;
}

@keyframes f6SubIn {
    to { opacity: 1; transform: none; }
}

.f6-boot__hint {
    position: absolute;
    bottom: clamp(28px, 6vh, 44px);
    left: 50%;
    transform: translateX(-50%);
    font-size: 11px;
    letter-spacing: 0.12em;
    color: rgba(243, 240, 233, 0.22);
    opacity: 0;
    pointer-events: none;
    animation: f6HintIn 0.6s ease 1s forwards;
}

@keyframes f6HintIn { to { opacity: 1; } }

/* 金环边缘辉光脉冲 */
.f6-edge-glow {
    position: fixed;
    inset: 0;
    z-index: 190;
    pointer-events: none;
    opacity: 0;
    box-shadow:
        inset 0 0 70px 8px rgba(232, 184, 92, 0.3),
        inset 0 0 150px 34px rgba(84, 120, 200, 0.12);
}

.f6-edge-glow.is-pulse { animation: f6EdgePulse 1.35s var(--ease) forwards; }

/* Heartbeat double pulse */
@keyframes f6EdgePulse {
    0% { opacity: 0; }
    20% { opacity: 1; }
    44% { opacity: 0.3; }
    60% { opacity: 0.75; }
    100% { opacity: 0; }
}

/* 分区点亮 */
body.f6-booting .f6-wake { opacity: 0; transform: translateY(20px); }

body.f6-wakeup .f6-wake {
    opacity: 1;
    transform: none;
    transition: opacity 0.75s var(--ease), transform 0.75s var(--ease);
    transition-delay: calc(var(--w, 0) * 105ms);
}

body.f6-wakeup .f6-stat-num {
    text-shadow: 0 0 24px rgba(232, 184, 92, 0.3);
    transition: text-shadow 1.6s ease 1.1s;
}

/* 减弱动效：跳过启动 + 静态化全部动效 */
@media (prefers-reduced-motion: reduce) {
    .f6-boot, .f6-edge-glow { display: none !important; }

    body.f6-booting .f6-wake,
    body.f6-wakeup .f6-wake { opacity: 1; transform: none; transition: none; }

    .f6-boot__beam { animation: none; }
    .f6-tier, .f6-btn, .f6-forum-card { transition: none; }
}

/* ── 响应式 ── */
@media (max-width: 640px) {
    .f6-boot__word {
        letter-spacing: 0.26em;
        text-indent: 0.26em;
    }
}

@media (max-width: 900px) {
    .f6-nav-links { display: none; }
    .f6-search input { width: 150px; }
    .f6-search input:focus { width: 170px; }
}

@media (max-width: 768px) {
    .f6-hero { grid-template-columns: 1fr; gap: 36px; padding: 52px 0 48px; }
    .f6-forum-grid { grid-template-columns: 1fr; }
    .f6-search { display: none; }
    .f6-hero-stats { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}

@media (max-width: 520px) {
    .f6-hero-stats { grid-template-columns: 1fr; }
}

/* -- UI chrome is not selectable: keeps drags/double-clicks from painting text -- */
body.forum6 h1,
body.forum6 h2,
body.forum6 h3,
body.forum6 .f6-nav,
body.forum6 .f6-notice,
body.forum6 .f6-hero-sub,
body.forum6 .f6-hero-ctas,
body.forum6 .f6-hero-panel,
body.forum6 .f6-forum-card,
body.forum6 .f6-tier-stage,
body.forum6 .f6-tier-nav,
body.forum6 .f6-hot-row,
body.forum6 .f6-footer,
body.forum6 .f6-section-head {
    -webkit-user-select: none;
    user-select: none;
}

body.forum6 .f6-search input,
body.forum6 input,
body.forum6 textarea {
    -webkit-user-select: text;
    user-select: text;
}