/* ===== 设计令牌（全站统一） ===== */
:root {
    --brand: #2b5ce6;          /* 品牌蓝：按钮、链接、选中态 */
    --brand-dark: #1b47c4;     /* 品牌蓝加深：hover */
    --brand-soft: #eef4ff;     /* 品牌色浅底：图标底、卡片 hover 边 */
    --ink: #1f2a44;            /* 标题深色 */
    --text: #4b5563;           /* 正文灰 */
    --muted: #8a94a6;          /* 次要文字 */
    --line: #eef1f6;           /* 分割线 / 卡片描边 */
    --soft: #f7f9fc;           /* 浅色区块底 */
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
    font-family: -apple-system, "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
    color: #111827;
    background: #fff;
    font-size: 15px;
    line-height: 1.7;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }

.container { width: 100%; max-width: 1440px; margin: 0 auto; padding: 0 24px; }
.muted { color: #9ca3af; font-size: 13px; }

/* header */
.site-header {
    position: sticky; top: 0; z-index: 50;
    background: #fff;
    border-bottom: 1px solid var(--line);
}
.header-inner { display: flex; align-items: center; height: 72px; gap: 16px; }
.logo { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 18px; flex: 0 0 auto; }
.logo-img { height: 30px; width: auto; display: block; }
.logo-tag {
    font-size: 12.5px; color: #8a94a6; background: #f4f6fa;
    border-radius: 14px; padding: 5px 12px; white-space: nowrap;
}
.logo-mark {
    width: 30px; height: 30px; border-radius: 8px;
    background: var(--brand); color: #fff;
    display: flex; align-items: center; justify-content: center;
    font-size: 15px;
}
.nav { display: flex; gap: 2px; flex: 1; justify-content: center; }
.nav a {
    position: relative; padding: 26px 14px; font-size: 15px; color: #3d4451; border-radius: 0;
}
.nav a:hover { color: var(--brand); background: transparent; }
.nav a.active { color: var(--brand); font-weight: 500; background: transparent; }
.nav a.active::after {
    content: ''; position: absolute; left: 14px; right: 14px; bottom: 0;
    height: 3px; border-radius: 2px 2px 0 0; background: var(--brand);
}

/* 产品中心下拉 */
.nav-drop { position: relative; display: flex; align-items: center; }
.nav-drop-toggle { display: inline-flex; align-items: center; gap: 4px; }
.nav-drop-toggle .caret { font-size: 10px; color: #9ca3af; transition: .15s; }
.nav-drop:hover .nav-drop-toggle .caret { color: var(--brand); transform: rotate(180deg); }
.nav-drop-menu {
    position: absolute; left: 14px; top: 100%;
    min-width: 178px; padding: 6px;
    background: #fff; border: 1px solid var(--line); border-radius: 8px;
    box-shadow: 0 14px 34px rgba(15,23,42,.10);
    opacity: 0; visibility: hidden; transform: translateY(4px);
    transition: .16s; z-index: 60;
}
.nav-drop:hover .nav-drop-menu,
.nav-drop:focus-within .nav-drop-menu { opacity: 1; visibility: visible; transform: translateY(0); }
.nav-drop-menu a {
    display: block; padding: 9px 12px; border-radius: 6px;
    font-size: 14px; color: #3d4451; background: transparent; white-space: nowrap;
}
.nav-drop-menu a:hover { background: #f5f9ff; color: var(--brand); }
.header-actions { display: flex; align-items: center; gap: 18px; flex: 0 0 auto; }
.header-actions .hd-link { font-size: 14px; color: #5b6474; }
.header-actions .hd-link:hover { color: var(--brand); }
.header-actions .btn { border-radius: 4px; padding: 8px 20px; font-size: 14px; }

/* buttons */
.btn {
    display: inline-block; padding: 7px 14px; border-radius: 8px;
    border: 1px solid #d1d5db; font-size: 14px; color: #374151; background: #fff;
    cursor: pointer; transition: .15s;
}
.btn:hover { border-color: #9ca3af; }
.btn-primary { background: var(--brand); border-color: var(--brand); color: #fff; }
.btn-primary:hover { background: var(--brand-dark); border-color: var(--brand-dark); }
.btn-ghost { border-color: transparent; color: #4b5563; }
.btn-ghost:hover { background: #f3f4f6; }
.btn-outline { background: #fff; border-color: #c8d6f7; color: var(--brand); }
.btn-outline:hover { border-color: var(--brand); background: #f5f8ff; }
.btn-lg { padding: 11px 22px; font-size: 15px; }
/* 首页大按钮尺寸（复用 .btn / .btn-primary / .btn-outline） */
.btn-xl { height: 46px; padding: 0 26px; border-radius: 6px; font-size: 15px; line-height: 44px; }

/* hero */
.hero {
    background: linear-gradient(160deg, #0f172a 0%, #1e3a8a 100%);
    color: #fff; padding: 84px 0 76px;
}
.hero h1 { font-size: 40px; line-height: 1.25; margin: 0 0 16px; letter-spacing: -.5px; }
.hero-sub { color: #cbd5e1; font-size: 17px; max-width: 720px; margin: 0 0 28px; }
.hero-actions { display: flex; gap: 12px; flex-wrap: wrap; }
.hero .btn-ghost { color: #e2e8f0; border-color: rgba(255,255,255,.28); background: transparent; }
.hero .btn-ghost:hover { background: rgba(255,255,255,.1); }

/* sections */
.section { padding: 56px 0; }
.section-alt { background: #f8fafc; border-top: 1px solid #f1f5f9; border-bottom: 1px solid #f1f5f9; }
.section-head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 22px; }
.section-head h2 { font-size: 22px; margin: 0; }
.more { color: var(--brand); font-size: 14px; }

.grid { display: grid; gap: 18px; }
.grid-2 { grid-template-columns: repeat(2, minmax(0,1fr)); }
.grid-3 { grid-template-columns: repeat(3, minmax(0,1fr)); }
.grid-4 { grid-template-columns: repeat(4, minmax(0,1fr)); }

.card {
    border: 1px solid var(--line); border-radius: 14px; padding: 22px;
    background: #fff; transition: .18s;
}
.card:hover { border-color: #dbeafe; box-shadow: 0 8px 24px rgba(15,23,42,.06); transform: translateY(-2px); }
.card h3 { font-size: 17px; margin: 10px 0 8px; }
.card p { color: #6b7280; font-size: 14px; margin: 0; }
.card-icon { font-size: 22px; }

.news-card {
    display: block; border: 1px solid var(--line); border-radius: 14px; padding: 20px;
    background: #fff; transition: .18s;
}
.news-card:hover { border-color: #dbeafe; box-shadow: 0 8px 24px rgba(15,23,42,.06); }
.news-card h3 { font-size: 16px; margin: 8px 0 6px; }
.news-card p { color: #6b7280; font-size: 14px; margin: 0; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.news-meta { color: #9ca3af; font-size: 12px; }

.help-link {
    display: block; padding: 14px 16px; border: 1px solid var(--line); border-radius: 12px;
    color: #374151; font-size: 14px;
}
.help-link::before { content: "›"; color: #93c5fd; margin-right: 8px; }
.help-link:hover { border-color: #dbeafe; background: #f8fbff; }

/* page head */
.page-head { background: #0f172a; color: #fff; padding: 52px 0; }
.page-head h1 { font-size: 28px; margin: 0 0 8px; }
.page-sub { color: #94a3b8; margin: 0; font-size: 14px; }

/* list layout */
.layout-2col { display: grid; grid-template-columns: 1fr 260px; gap: 32px; padding: 36px 0 64px; }
.col-main { min-width: 0; }
.col-side { display: flex; flex-direction: column; gap: 18px; }

.side-box { border: 1px solid var(--line); border-radius: 12px; padding: 14px; }
.side-title { font-size: 13px; color: #6b7280; margin-bottom: 10px; font-weight: 600; }
.side-link { display: block; padding: 7px 8px; border-radius: 8px; font-size: 14px; color: #374151; }
.side-link:hover { background: #f3f4f6; }
.side-link.active { background: #eff6ff; color: var(--brand-dark); }

.list { display: flex; flex-direction: column; gap: 12px; }
.list-item {
    display: flex; justify-content: space-between; gap: 20px;
    padding: 18px 20px; border: 1px solid var(--line); border-radius: 12px; background: #fff;
}
.list-item:hover { border-color: #dbeafe; background: #fbfdff; }
.list-item-main { min-width: 0; }
.list-item-main h3 { font-size: 16px; margin: 0 0 6px; }
.list-item-main p { margin: 0; color: #6b7280; font-size: 14px; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.list-item-meta { display: flex; flex-direction: column; align-items: flex-end; gap: 6px; white-space: nowrap; }
.tag { display: inline-block; padding: 2px 9px; border-radius: 999px; background: #eff6ff; color: var(--brand-dark); font-size: 12px; }
.date { color: #9ca3af; font-size: 12px; }

.pager { display: flex; align-items: center; gap: 12px; margin-top: 26px; }
.page-btn { padding: 6px 14px; border: 1px solid #e5e7eb; border-radius: 8px; font-size: 14px; color: #374151; }
.page-btn:hover { border-color: #93c5fd; color: var(--brand-dark); }
.page-info { color: #9ca3af; font-size: 13px; }

/* article */
.article-wrap { max-width: 860px; padding: 32px 20px 72px; }
.breadcrumb { color: #9ca3af; font-size: 13px; margin-bottom: 18px; }
.breadcrumb a { color: #6b7280; }
.breadcrumb a:hover { color: var(--brand); }
.article h1 { font-size: 30px; line-height: 1.35; margin: 0 0 14px; }
.article-meta { display: flex; gap: 14px; align-items: center; color: #9ca3af; font-size: 13px; margin-bottom: 24px; }
.article-cover { margin: 0 0 24px; border-radius: 12px; overflow: hidden; }
.article-body { font-size: 15.5px; color: #374151; }
.article-body h2 { font-size: 20px; margin: 32px 0 12px; }
.article-body h3 { font-size: 17px; margin: 26px 0 10px; }
.article-body p { margin: 0 0 16px; }
.article-body img { border-radius: 10px; margin: 18px 0; }
.article-body ul, .article-body ol { padding-left: 22px; margin: 0 0 16px; }
.article-body code { background: #f3f4f6; padding: 2px 6px; border-radius: 5px; font-size: 13px; }
.article-body pre { background: #0f172a; color: #e2e8f0; padding: 16px; border-radius: 10px; overflow: auto; }
.article-body blockquote { margin: 0 0 16px; padding: 10px 16px; border-left: 3px solid #93c5fd; background: #f8fbff; color: #4b5563; }

.related { margin-top: 40px; padding-top: 22px; border-top: 1px solid var(--line); }

/* help */
.chips { display: flex; gap: 8px; flex-wrap: wrap; padding: 24px 0 8px; }
.chip { padding: 6px 14px; border: 1px solid #e5e7eb; border-radius: 999px; font-size: 14px; color: #4b5563; }
.chip:hover { border-color: #93c5fd; color: var(--brand-dark); }
.chip.active { background: var(--brand); border-color: var(--brand); color: #fff; }
.help-card { display: block; padding: 20px; border: 1px solid var(--line); border-radius: 12px; }
.help-card:hover { border-color: #dbeafe; background: #fbfdff; }
.help-card h3 { font-size: 16px; margin: 10px 0 6px; }
.help-card p { margin: 0; color: #6b7280; font-size: 14px; }

/* empty */
.empty-box {
    padding: 56px 20px; text-align: center; color: #9ca3af;
    border: 1px dashed #e5e7eb; border-radius: 14px; background: #fafbfc;
}

/* footer */
.site-footer { background: #fafbfc; border-top: 1px solid var(--line); color: #7b8494; }
.footer-top { display: grid; grid-template-columns: repeat(4, 1fr); gap: 40px; padding: 52px 0 42px; }
.f-col h4 { margin: 0 0 16px; font-size: 15px; color: var(--ink); font-weight: 600; }
.f-col a, .f-col p { display: block; margin: 0; font-size: 13.5px; line-height: 2.15; color: #7b8494; }
.f-col a:hover { color: var(--brand); }
.footer-bottom {
    border-top: 1px solid var(--line); padding: 18px 0 26px;
    text-align: center; font-size: 12.5px; color: #9aa3b2; line-height: 1.95;
}
.footer-bottom span { margin: 0 8px; }

/* 全站右侧悬浮按钮 */
.site-rail { position: fixed; right: 0; top: 128px; z-index: 40; display: flex; flex-direction: column; gap: 8px; }
.rail-item { position: relative; }
.rail-btn {
    display: block;
    width: 54px; padding: 10px 6px; border-radius: 8px 0 0 8px;
    background: var(--brand); color: #fff; font-size: 12px; text-align: center;
    line-height: 1.5; word-break: break-all;
    box-shadow: 0 10px 22px rgba(43,92,230,.24); transition: filter .15s;
}
.rail-btn.c-orange { background: #f28b23; box-shadow: 0 10px 22px rgba(242,139,35,.24); }
.rail-btn.c-green { background: #2f9e6e; box-shadow: 0 10px 22px rgba(47,158,110,.24); }
.rail-btn.c-dark { background: #2b3445; box-shadow: 0 10px 22px rgba(43,52,69,.24); }
.rail-btn:hover { filter: brightness(1.05); }

/* 悬停展开的面板（参考大麦 IP 的「联系我们」） */
.rail-pop {
    position: absolute; right: calc(100% + 10px); top: 50%;
    min-width: 168px; max-width: 260px;
    padding: 14px 16px; background: #fff; border: 1px solid var(--line); border-radius: 10px;
    box-shadow: 0 16px 40px rgba(15,23,42,.14);
    transform: translateY(-50%) translateX(8px);
    opacity: 0; visibility: hidden; pointer-events: none;
    transition: opacity .18s, transform .18s, visibility .18s;
    text-align: left; white-space: normal;
}
.rail-pop::after {
    content: ''; position: absolute; right: -5px; top: 50%; width: 8px; height: 8px;
    background: #fff; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line);
    transform: translateY(-50%) rotate(-45deg);
}
.rail-item:hover .rail-pop { opacity: 1; visibility: visible; pointer-events: auto; transform: translateY(-50%) translateX(0); }
.rail-pop-title { font-size: 13px; font-weight: 600; color: var(--ink); margin-bottom: 6px; }
.rail-qr { width: 120px; height: 120px; object-fit: contain; border-radius: 6px; margin: 4px 0 8px; border: 1px solid var(--line); }
.rail-pop-desc { font-size: 12.5px; color: #6b7280; line-height: 1.85; white-space: pre-line; }
.rail-pop-link { display: inline-block; margin-top: 8px; font-size: 12.5px; color: var(--brand); }
.rail-pop-link:hover { text-decoration: underline; }

/* 404 */
.notfound { min-height: 100vh; display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 10px; }
.notfound .code { font-size: 84px; font-weight: 800; color: #e5e7eb; line-height: 1; }
.notfound h1 { font-size: 24px; margin: 0; }
.notfound p { color: #6b7280; margin: 0; }
.notfound-actions { display: flex; gap: 10px; margin-top: 14px; }

/* responsive */
@media (max-width: 1080px) {
    .logo-tag { display: none; }
    .header-actions .hd-link { display: none; }
}
@media (max-width: 960px) {
    .grid-4 { grid-template-columns: repeat(2, minmax(0,1fr)); }
    .layout-2col { grid-template-columns: 1fr; }
    .footer-top { grid-template-columns: repeat(2, 1fr); gap: 28px; padding: 40px 0 32px; }
}
@media (max-width: 720px) {
    .hero { padding: 56px 0 48px; }
    .hero h1 { font-size: 28px; }
    .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
    .nav { display: none; }
    .header-inner { height: 64px; }
    .header-actions { gap: 10px; margin-left: auto; }
    .footer-top { grid-template-columns: repeat(2, minmax(0,1fr)); gap: 22px 18px; }
    .article h1 { font-size: 24px; }
    .list-item { flex-direction: column; gap: 8px; }
    .list-item-meta { flex-direction: row; align-items: center; }
    .site-rail { display: none; }
}

/* member auth */
.auth-wrap { max-width: 460px; padding-top: 8px; padding-bottom: 8px; }
.auth-card {
    border: 1px solid var(--line); border-radius: 16px; padding: 30px;
    background: #fff; box-shadow: 0 12px 32px rgba(15,23,42,.05);
}
.auth-title { font-size: 22px; margin: 0 0 6px; }
.auth-sub { color: #6b7280; font-size: 13px; margin: 0 0 20px; line-height: 1.6; }
.field { margin-bottom: 14px; }
.field label { display: block; font-size: 13px; color: #4b5563; margin-bottom: 6px; }
.field input {
    width: 100%; padding: 10px 12px; border: 1px solid #e5e7eb; border-radius: 9px;
    font-size: 14px; outline: none; transition: .15s; background: #fff;
}
.field input:focus { border-color: #93c5fd; box-shadow: 0 0 0 3px rgba(147,197,253,.18); }
.btn-block { display: block; width: 100%; text-align: center; padding: 11px 0; font-size: 15px; }
.auth-foot {
    display: flex; justify-content: space-between; gap: 10px; flex-wrap: wrap;
    margin-top: 16px; font-size: 13px; color: #6b7280;
}
.auth-foot a { color: var(--brand); }
.alert { padding: 10px 12px; border-radius: 9px; font-size: 13px; margin-bottom: 14px; }
.alert-error { background: #fef2f2; color: #b91c1c; border: 1px solid #fecaca; }

/* member console */
.stat-grid { display: grid; grid-template-columns: repeat(4, minmax(0,1fr)); gap: 16px; }
.stat { border: 1px solid var(--line); border-radius: 14px; padding: 18px; background: #fff; }
.stat-label { color: #6b7280; font-size: 13px; }
.stat-num { font-size: 26px; font-weight: 700; margin: 8px 0 4px; color: #0f172a; }
.stat-num.stat-small { font-size: 18px; }
.stat-note { color: #9ca3af; font-size: 12px; }
.panel { border: 1px solid var(--line); border-radius: 14px; padding: 20px; margin-top: 20px; background: #fff; }
.panel-head { font-weight: 600; margin-bottom: 14px; }
.panel-tip { color: #9ca3af; font-size: 12px; margin: 12px 0 0; }
.quick-grid { display: grid; grid-template-columns: repeat(4, minmax(0,1fr)); gap: 12px; }
.quick-item { display: block; padding: 14px; border: 1px solid var(--line); border-radius: 12px; }
.quick-item strong { display: block; font-size: 14px; margin-bottom: 4px; }
.quick-item span { color: #9ca3af; font-size: 12px; }
.quick-item:hover { border-color: #dbeafe; background: #f8fbff; }
.kv-list { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 10px 24px; }
.kv {
    display: flex; justify-content: space-between; gap: 12px;
    padding: 8px 0; border-bottom: 1px dashed #f1f5f9; font-size: 14px;
}
.kv span { color: #6b7280; }

@media (max-width: 960px) {
    .stat-grid, .quick-grid { grid-template-columns: repeat(2, minmax(0,1fr)); }
    .kv-list { grid-template-columns: 1fr; }
}
@media (max-width: 720px) {
    .stat-grid, .quick-grid { grid-template-columns: 1fr; }
}