/* =========================================================
   聚核号 · 手机套餐营销博客样式
   现代 / 清新 / 科技感 · 移动优先
   ========================================================= */

:root {
    --bg: #f5f8ff;
    --bg-soft: #eef4ff;
    --surface: #ffffff;
    --ink: #0b1b33;
    --ink-2: #3d516e;
    --ink-3: #6b7f9c;
    --line: #e3eaf7;
    --brand: #2f6bff;
    --brand-2: #12d3e8;
    --brand-3: #7c5cff;
    --grad: linear-gradient(120deg, #2f6bff 0%, #12c9e6 55%, #6a5cff 100%);
    --grad-soft: linear-gradient(135deg, rgba(47, 107, 255, .12), rgba(18, 211, 232, .10));
    --telecom: #0f7be8;
    --mobile: #e8382f;
    --unicom: #e6392b;
    --cbn: #12a4a0;
    --ok: #10b981;
    --warm: #f59e0b;
    --radius: 18px;
    --radius-sm: 12px;
    --shadow-sm: 0 4px 16px rgba(23, 60, 120, .07);
    --shadow: 0 16px 40px rgba(23, 60, 120, .10);
    --shadow-lg: 0 30px 70px rgba(23, 60, 120, .16);
    --max: 1180px;
    --font: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB",
        "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }

body {
    margin: 0;
    font-family: var(--font);
    color: var(--ink);
    background: var(--bg);
    line-height: 1.7;
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; height: auto; }
a { color: var(--brand); text-decoration: none; transition: color .2s ease; }
a:hover { color: #1646c0; }
h1, h2, h3, h4 { line-height: 1.3; margin: 0 0 .6em; color: var(--ink); font-weight: 700; letter-spacing: -.01em; }
p { margin: 0 0 1em; }
ul, ol { margin: 0; padding: 0; }

.container { width: 100%; max-width: var(--max); margin: 0 auto; padding: 0 20px; }
.container-narrow { max-width: 860px; }
.container-article { max-width: 820px; }

.sr-only {
    position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
    overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}
.skip-link {
    position: absolute; left: -9999px; top: 0; z-index: 999;
    background: var(--brand); color: #fff; padding: 10px 16px; border-radius: 0 0 10px 0;
}
.skip-link:focus { left: 0; color: #fff; }

/* ---------------- 按钮 ---------------- */
.btn {
    display: inline-flex; align-items: center; justify-content: center; gap: 6px;
    padding: 10px 20px; border-radius: 999px; font-size: 15px; font-weight: 600;
    border: 1px solid transparent; cursor: pointer; transition: .22s ease; white-space: nowrap;
}
.btn-primary {
    background: var(--grad); color: #fff;
    box-shadow: 0 10px 24px rgba(47, 107, 255, .30);
}
.btn-primary:hover { transform: translateY(-2px); color: #fff; box-shadow: 0 16px 30px rgba(47, 107, 255, .38); }
.btn-ghost { background: rgba(255, 255, 255, .8); color: var(--ink); border-color: var(--line); }
.btn-ghost:hover { border-color: var(--brand); color: var(--brand); background: #fff; }
.btn-light { background: #fff; color: var(--brand); }
.btn-light:hover { transform: translateY(-2px); color: #1646c0; }
.btn-lg { padding: 13px 28px; font-size: 16px; }
.btn-block { display: flex; width: 100%; }
.btn-sm { padding: 7px 14px; font-size: 13px; }

/* ---------------- 顶部导航 ---------------- */
.site-header {
    position: sticky; top: 0; z-index: 100;
    background: rgba(255, 255, 255, .78);
    backdrop-filter: saturate(180%) blur(14px);
    -webkit-backdrop-filter: saturate(180%) blur(14px);
    border-bottom: 1px solid rgba(227, 234, 247, .9);
}
.header-inner { display: flex; align-items: center; gap: 18px; height: 68px; }
.logo { display: flex; align-items: center; gap: 10px; color: var(--ink); }
.logo-mark { display: flex; }
.logo-text { display: flex; flex-direction: column; line-height: 1.15; }
.logo-text strong { font-size: 19px; letter-spacing: .5px; }
.logo-text small { font-size: 11px; color: var(--ink-3); letter-spacing: .12em; }

.main-nav { margin-left: auto; }
.main-nav > ul { display: flex; align-items: center; gap: 4px; list-style: none; }
.main-nav a { display: inline-flex; align-items: center; gap: 5px; padding: 9px 14px; border-radius: 10px; color: var(--ink-2); font-size: 15px; font-weight: 500; }
.main-nav li:hover > a, .main-nav li.is-active > a { color: var(--brand); background: rgba(47, 107, 255, .08); }
.caret { opacity: .6; }
.has-sub { position: relative; }
.sub-menu {
    position: absolute; top: calc(100% + 8px); left: 0; min-width: 230px; list-style: none;
    background: #fff; border: 1px solid var(--line); border-radius: 16px; padding: 8px;
    box-shadow: var(--shadow); opacity: 0; visibility: hidden; transform: translateY(8px);
    transition: .2s ease; z-index: 50;
}
.has-sub:hover .sub-menu, .has-sub:focus-within .sub-menu { opacity: 1; visibility: visible; transform: translateY(0); }
.sub-menu a { display: flex; justify-content: space-between; align-items: center; width: 100%; padding: 9px 12px; font-size: 14px; color: var(--ink-2); }
.sub-menu a:hover { background: var(--bg-soft); color: var(--brand); }
.sub-menu em { font-style: normal; font-size: 12px; color: var(--ink-3); }
.sub-all { border-top: 1px dashed var(--line); margin-top: 4px; }
.header-cta { padding: 9px 20px; font-size: 14px; }
.nav-toggle { display: none; }

/* ---------------- 面包屑 ---------------- */
.bc-wrap { padding-top: 14px; }
.breadcrumb ol { display: flex; flex-wrap: wrap; align-items: center; gap: 6px; list-style: none; font-size: 13px; color: var(--ink-3); }
.breadcrumb li { display: flex; align-items: center; gap: 6px; max-width: 60vw; }
.breadcrumb a { color: var(--ink-3); }
.breadcrumb a:hover { color: var(--brand); }
.breadcrumb [aria-current] { color: var(--ink-2); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.bc-sep { color: #c3cede; }

/* ---------------- 首屏 ---------------- */
.hero { position: relative; overflow: hidden; padding: 40px 0 48px; }
.hero-bg {
    position: absolute; inset: 0; z-index: -1;
    background:
        radial-gradient(60% 60% at 8% 10%, rgba(47, 107, 255, .18), transparent 60%),
        radial-gradient(50% 55% at 92% 20%, rgba(18, 211, 232, .20), transparent 62%),
        radial-gradient(45% 50% at 70% 95%, rgba(124, 92, 255, .16), transparent 60%),
        linear-gradient(180deg, #f7faff 0%, #eef5ff 60%, #f5f8ff 100%);
}
.hero-bg::after {
    content: ""; position: absolute; inset: 0;
    background-image: linear-gradient(rgba(47, 107, 255, .055) 1px, transparent 1px),
        linear-gradient(90deg, rgba(47, 107, 255, .055) 1px, transparent 1px);
    background-size: 46px 46px;
    mask-image: radial-gradient(75% 70% at 50% 40%, #000 30%, transparent 75%);
    -webkit-mask-image: radial-gradient(75% 70% at 50% 40%, #000 30%, transparent 75%);
}
/* minmax(0, ...) 取消 fr 轨道的 auto 最小值，避免窄屏时卡片内容撑破栅格 */
.hero-grid { display: grid; grid-template-columns: minmax(0, 1.06fr) minmax(0, .94fr); gap: 44px; align-items: center; }
.hero-copy, .hero-visual { min-width: 0; }
.hero-eyebrow {
    display: inline-flex; align-items: center; gap: 8px; margin: 0 0 12px;
    font-size: 13px; letter-spacing: .06em; color: var(--brand);
    background: rgba(47, 107, 255, .10); border: 1px solid rgba(47, 107, 255, .18);
    padding: 6px 14px; border-radius: 999px; font-weight: 600;
}
.hero-eyebrow .dot { width: 7px; height: 7px; border-radius: 50%; background: var(--brand-2); box-shadow: 0 0 0 4px rgba(18, 211, 232, .25); }
.hero h1 { font-size: clamp(24px, 3.6vw, 38px); font-weight: 800; letter-spacing: -.02em; margin-bottom: 14px; }
.grad-text {
    background: var(--grad); -webkit-background-clip: text; background-clip: text;
    color: transparent; padding: 0 4px;
}
.hero-sub { font-size: 16px; color: var(--ink-2); max-width: 540px; margin-bottom: 16px; }
.hero-pills { display: flex; flex-wrap: wrap; gap: 10px; list-style: none; margin-bottom: 20px; }
.hero-pills li {
    font-size: 13.5px; color: var(--ink-2); background: rgba(255, 255, 255, .85);
    border: 1px solid var(--line); padding: 7px 13px; border-radius: 999px; box-shadow: var(--shadow-sm);
}
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-bottom: 24px; }
.hero-stats { display: grid; grid-template-columns: repeat(4, auto); gap: 26px; margin: 0; justify-content: start; }
.hero-stats dt { display: flex; align-items: baseline; gap: 2px; }
.hero-stats .num { font-size: 28px; font-weight: 800; color: var(--ink); letter-spacing: -.02em; }
.hero-stats .unit { font-size: 13px; color: var(--brand); font-weight: 700; }
.hero-stats dd { margin: 0; font-size: 13px; color: var(--ink-3); }

.hero-visual { position: relative; min-height: 280px; }
.glass-card {
    background: rgba(255, 255, 255, .72); border: 1px solid rgba(255, 255, 255, .85);
    backdrop-filter: blur(16px); -webkit-backdrop-filter: blur(16px);
    border-radius: 22px; box-shadow: var(--shadow);
}
.card-main { padding: 20px; position: relative; z-index: 2; }
.cc-head { display: flex; justify-content: space-between; align-items: center; margin-bottom: 14px; }
.cc-title { font-weight: 700; font-size: 15px; }
.cc-tag { font-size: 11.5px; color: var(--ok); background: rgba(16, 185, 129, .12); padding: 3px 9px; border-radius: 999px; font-weight: 600; }
.cc-row {
    display: grid; grid-template-columns: auto minmax(0, 1fr) auto auto; gap: 10px; align-items: center;
    padding: 12px 12px; border-radius: 14px; background: rgba(245, 248, 255, .8);
    border: 1px solid var(--line); margin-bottom: 10px; font-size: 13.5px;
}
.cc-row:last-child { margin-bottom: 0; }
a.cc-row { text-decoration: none; transition: border-color .2s, box-shadow .2s, transform .2s, background .2s; }
a.cc-row:hover {
    background: #fff; border-color: rgba(47, 107, 255, .35);
    box-shadow: var(--shadow-sm); transform: translateY(-1px);
}
a.cc-row:hover .cc-name { color: var(--brand); }
.cc-badge {
    white-space: nowrap; font-size: 11.5px; font-weight: 700; line-height: 1.6;
    padding: 3px 9px; border-radius: 999px; color: #fff; background: var(--brand);
}
.cc-badge.mb-telecom { background: var(--telecom); }
.cc-badge.mb-mobile { background: var(--mobile); }
.cc-badge.mb-unicom { background: var(--unicom); }
.cc-badge.mb-cbn { background: var(--cbn); }
.cc-name { min-width: 0; font-weight: 600; color: var(--ink); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.cc-data { white-space: nowrap; color: var(--brand); font-weight: 700; font-size: 13px; }
.cc-price { white-space: nowrap; color: var(--ink); font-weight: 800; }

.card-float, .card-float2 {
    position: absolute; display: flex; gap: 10px; align-items: center;
    padding: 12px 16px; z-index: 3; animation: floaty 5s ease-in-out infinite;
}
.card-float { top: -14px; right: 6px; }
/* 高亮浮动卡：移到左侧并加强视觉层级 */
.card-float2, .card-float2-hl {
    left: -18px; right: auto; bottom: auto; top: 42%; animation-delay: 1.6s;
    padding: 14px 20px 14px 16px; border-radius: 18px;
    background:
        linear-gradient(135deg, rgba(47, 107, 255, .12), rgba(18, 211, 232, .10)),
        rgba(255, 255, 255, .88);
    border: 1px solid rgba(47, 107, 255, .30);
    box-shadow: 0 20px 46px rgba(47, 107, 255, .22), 0 0 0 4px rgba(47, 107, 255, .06);
}
.card-float2-hl::before {
    content: ""; position: absolute; inset: -1px; border-radius: inherit; padding: 1px;
    background: linear-gradient(135deg, rgba(47, 107, 255, .55), rgba(18, 211, 232, .45), rgba(124, 92, 255, .45));
    -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
    -webkit-mask-composite: xor; mask-composite: exclude;
    pointer-events: none;
}
.card-float2-hl::after {
    content: ""; position: absolute; left: 8px; top: 10px; width: 34px; height: 34px;
    border-radius: 12px; background: rgba(47, 107, 255, .28); filter: blur(10px);
    z-index: -1; animation: halo 5s ease-in-out infinite;
}
@keyframes halo { 0%, 100% { opacity: .5; transform: scale(1); } 50% { opacity: .9; transform: scale(1.25); } }
.card-float strong, .card-float2 strong, .card-float2-hl strong { display: block; font-size: 13.5px; color: var(--ink); }
.card-float small, .card-float2 small, .card-float2-hl small { font-size: 11.5px; color: var(--ink-3); }
.card-float2-hl strong { color: var(--brand); }
.card-float2-hl .cf-icon.alt {
    background: var(--grad); color: #fff; box-shadow: 0 8px 18px rgba(47, 107, 255, .35);
}
.cf-icon {
    width: 34px; height: 34px; border-radius: 11px; display: grid; place-items: center;
    background: rgba(16, 185, 129, .15); color: var(--ok); font-weight: 800; font-size: 15px;
}
.cf-icon.alt { background: rgba(47, 107, 255, .15); color: var(--brand); font-size: 12px; }
@keyframes floaty { 0%, 100% { transform: translateY(0); } 50% { transform: translateY(-9px); } }

/* ---------------- 首屏最新文章卡 ---------------- */
.card-new { padding: 18px 20px; position: relative; z-index: 2; margin-top: 16px; }
.cc-more { font-size: 12.5px; color: var(--brand); font-weight: 600; }
/* minmax(0,1fr) 让列表行可被压缩，长标题走省略号而不是撑破卡片 */
.new-list { list-style: none; counter-reset: hot; display: grid; grid-template-columns: minmax(0, 1fr); gap: 8px; }
.new-list li { display: flex; align-items: center; gap: 10px; min-width: 0; }
.new-list li > a {
    display: flex; align-items: center; gap: 10px; flex: 1; min-width: 0;
    padding: 9px 10px; border-radius: 12px; background: rgba(245, 248, 255, .8);
    border: 1px solid var(--line); transition: border-color .2s, box-shadow .2s, transform .2s;
}
.new-list li > a:hover { border-color: rgba(47, 107, 255, .35); box-shadow: var(--shadow-sm); transform: translateY(-1px); }
.new-rank {
    flex: none; width: 24px; height: 24px; border-radius: 8px; display: grid; place-items: center;
    font-size: 11.5px; font-weight: 800; color: var(--brand); background: rgba(47, 107, 255, .12);
}
.new-list li:first-child .new-rank { background: var(--grad); color: #fff; }
.new-title { min-width: 0; font-size: 13.5px; font-weight: 600; color: var(--ink); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.new-list time { flex: none; font-size: 11.5px; color: var(--ink-3); }

/* ---------------- 特点条 ---------------- */
.strip { background: #fff; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.strip-inner { display: flex; flex-wrap: wrap; align-items: center; justify-content: center; gap: 14px; padding: 14px 20px; font-size: 13.5px; color: var(--ink-2); }
.strip-inner i { width: 5px; height: 5px; border-radius: 50%; background: var(--brand-2); display: inline-block; }

/* ---------------- 区块通用 ---------------- */
.section { padding: 20px 0; }
.section-tight { padding: 32px 0 48px; }
.section-alt {
    background: linear-gradient(180deg, #fff 0%, #f7faff 100%);
    border-top: 1px solid var(--line); border-bottom: 1px solid var(--line);
}
.sec-head { text-align: center; max-width: 760px; margin: 0 auto 30px; }
.sec-head-left { text-align: left; margin-left: 0; }
.eyebrow {
    display: inline-block; font-size: 13px; font-weight: 700; letter-spacing: .14em;
    color: var(--brand); text-transform: uppercase; margin-bottom: 10px;
}
.sec-head h2 { font-size: clamp(24px, 3vw, 33px); font-weight: 800; }
.sec-sub { color: var(--ink-2); font-size: 15.5px; }
.sec-more { text-align: center; margin-top: 24px; }
.empty, .empty-box { text-align: center; color: var(--ink-3); padding: 30px 20px; }
.empty-box { background: #fff; border: 1px dashed var(--line); border-radius: var(--radius); grid-column: 1 / -1; }
.result-count { font-size: 14.5px; color: var(--ink-3); margin-bottom: 20px; }
.result-count strong { color: var(--brand); font-size: 18px; }

/* ---------------- 运营商卡片 ---------------- */
.brand-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.brand-card {
    position: relative; display: block; background: #fff; border: 1px solid var(--line);
    border-radius: var(--radius); padding: 24px 22px; overflow: hidden;
    transition: .25s ease; color: var(--ink);
}
.brand-card::before {
    content: ""; position: absolute; inset: 0 0 auto 0; height: 4px; background: var(--c, var(--grad));
    opacity: .9;
}
.brand-card:hover { transform: translateY(-6px); box-shadow: var(--shadow); border-color: transparent; color: var(--ink); }
.brand-ico {
    width: 52px; height: 52px; border-radius: 16px; display: grid; place-items: center;
    font-size: 22px; font-weight: 800; color: #fff; background: var(--c, var(--grad));
    margin-bottom: 14px; box-shadow: 0 8px 18px rgba(30, 70, 150, .22);
}
.brand-card h3 { font-size: 19px; margin-bottom: 6px; }
.brand-card p { font-size: 13.5px; color: var(--ink-3); min-height: 30px; margin-bottom: 0px; }
.brand-count { font-size: 13.5px; font-weight: 600; color: var(--brand); }
.brand-count i { font-style: normal; transition: transform .2s; display: inline-block; }
.brand-card:hover .brand-count i { transform: translateX(5px); }
.bc-telecom { --c: var(--telecom); }
.bc-mobile { --c: var(--mobile); }
.bc-unicom { --c: var(--unicom); }
.bc-cbn { --c: var(--cbn); }
.brand-grid-sm { grid-template-columns: repeat(3, 1fr); }

/* ---------------- 套餐卡片 ---------------- */
.plan-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.plan-card {
    background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
    padding: 20px; display: flex; flex-direction: column; transition: .25s ease; position: relative;
    overflow: hidden;
}
.plan-card::after {
    content: ""; position: absolute; right: -40px; top: -40px; width: 120px; height: 120px;
    border-radius: 50%; background: var(--grad-soft); z-index: 0;
}
.plan-card > * { position: relative; z-index: 1; }
.plan-card:hover { transform: translateY(-5px); box-shadow: var(--shadow); border-color: transparent; }
.plan-head { display: flex; gap: 8px; align-items: center; margin-bottom: 10px; min-height: 24px; }
.mini-brand {
    font-size: 12px; font-weight: 700; padding: 3px 9px; border-radius: 999px; color: #fff;
    background: var(--brand);
}
.mini-brand.mb-telecom { background: var(--telecom); }
.mini-brand.mb-mobile { background: var(--mobile); }
.mini-brand.mb-unicom { background: var(--unicom); }
.mini-brand.mb-cbn { background: var(--cbn); }
.badge { font-size: 11.5px; font-weight: 700; padding: 3px 9px; border-radius: 999px; }
.badge-hot { color: #fff; background: linear-gradient(120deg, #ff5f6d, #ff9966); }
.badge-warm { color: #b45309; background: rgba(245, 158, 11, .16); }
.badge-ok { color: #047857; background: rgba(16, 185, 129, .14); }
.plan-name { font-size: 18px; margin-bottom: 8px; }
.plan-name a { color: var(--ink); }
.plan-name a:hover { color: var(--brand); }
.plan-price { display: flex; align-items: baseline; gap: 3px; flex-wrap: wrap; margin-bottom: 10px; }
.plan-price .cny { font-size: 16px; color: var(--brand); font-weight: 700; }
.plan-price .num { font-size: 34px; font-weight: 800; color: var(--brand); letter-spacing: -.02em; }
.plan-price .per { font-size: 13px; color: var(--ink-3); }
.plan-old { font-size: 12.5px; color: var(--ink-3); text-decoration: line-through; margin-left: 6px; }
.plan-data { display: flex; align-items: baseline; gap: 7px; padding: 9px 12px; border-radius: 12px; background: linear-gradient(120deg, rgba(47, 107, 255, .10), rgba(18, 211, 232, .10)); margin-bottom: 12px; }
.plan-data .data-num { font-size: 21px; font-weight: 800; color: var(--ink); }
.plan-data .data-txt { font-size: 12.5px; color: var(--ink-2); }
.plan-chips { display: flex; flex-wrap: wrap; gap: 7px; margin-bottom: 12px; }
.chip { font-size: 12px; color: var(--ink-2); background: var(--bg-soft); border: 1px solid var(--line); padding: 3px 9px; border-radius: 8px; }
.plan-sum { font-size: 13.5px; color: var(--ink-3); margin-bottom: 16px; min-height: 42px; }
.plan-foot { display: flex; gap: 10px; margin-top: auto; }
.plan-foot .btn { flex: 1; padding: 10px 12px; font-size: 14px; }
.plan-grid-sm .plan-card { padding: 16px; }
.plan-grid-sm .plan-price .num { font-size: 27px; }

/* ---------------- 为什么选择 ---------------- */
.why-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.why-card { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 26px 22px; transition: .25s; }
.why-card:hover { box-shadow: var(--shadow); transform: translateY(-4px); }
.why-ico {
    display: grid; place-items: center; width: 48px; height: 48px; border-radius: 15px;
    background: var(--grad-soft); font-size: 22px; margin-bottom: 14px;
}
.why-card h3 { font-size: 18px; margin-bottom: 8px; }
.why-card p { font-size: 14px; color: var(--ink-2); margin: 0; }

/* ---------------- 流程 ---------------- */
.section-steps { background: #fff; }
.steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; list-style: none; counter-reset: step; }
.steps li { position: relative; background: linear-gradient(180deg, #f8fbff, #fff); border: 1px solid var(--line); border-radius: var(--radius); padding: 18px 16px; }
.step-no { display: block; font-size: 30px; font-weight: 800; color: rgba(47, 107, 255, .28); letter-spacing: -.03em; margin-bottom: 0px; }
.steps h3 { font-size: 17px; margin-bottom: 6px; }
.steps p { font-size: 13.8px; color: var(--ink-2); margin: 0; }
.steps li:not(:last-child)::after {
    content: "→"; position: absolute; right: -15px; top: 50%; transform: translateY(-50%);
    color: var(--brand); font-size: 18px; z-index: 2; background: #fff; border-radius: 50%;
    width: 26px; height: 26px; display: grid; place-items: center; border: 1px solid var(--line);
}

/* ---------------- 分类 / 文章 ---------------- */
.cat-chips { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 26px; }
.cat-chips-center { justify-content: center; margin-top: 18px; margin-bottom: 0; }
.cat-chips a {
    display: inline-flex; align-items: center; gap: 6px; font-size: 14px; color: var(--ink-2);
    background: #fff; border: 1px solid var(--line); padding: 7px 15px; border-radius: 999px; transition: .2s;
}
.cat-chips a em { font-style: normal; font-size: 12px; color: var(--ink-3); background: var(--bg-soft); border-radius: 999px; padding: 1px 7px; }
.cat-chips a:hover, .cat-chips a.is-on { border-color: var(--brand); color: var(--brand); background: rgba(47, 107, 255, .07); }
.cat-chips a.is-on em { color: var(--brand); }

.post-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.post-grid-sm { grid-template-columns: repeat(3, 1fr); gap: 14px; }
.post-item {
    background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
    padding: 22px; display: flex; flex-direction: column; transition: .25s;
}
.post-item:hover { box-shadow: var(--shadow); transform: translateY(-4px); border-color: transparent; }
.post-item__meta { display: flex; align-items: center; gap: 10px; font-size: 12.5px; color: var(--ink-3); margin-bottom: 10px; }
.post-cat { color: var(--brand); background: rgba(47, 107, 255, .09); padding: 2px 9px; border-radius: 7px; font-weight: 600; }
.post-item__title { font-size: 17px; line-height: 1.45; margin-bottom: 9px; }
.post-item__title a { color: var(--ink); }
.post-item__title a:hover { color: var(--brand); }
.post-item__sum { font-size: 14px; color: var(--ink-2); margin-bottom: 14px; flex: 1; }
.post-item__more { font-size: 13.5px; font-weight: 600; color: var(--brand); }
.post-list { display: flex; flex-direction: column; gap: 16px; margin-bottom: 26px; }
.post-list .post-item { padding: 24px 26px; }

/* ---------------- FAQ ---------------- */
.faq-list { display: flex; flex-direction: column; gap: 12px; }
.faq-item { background: #fff; border: 1px solid var(--line); border-radius: var(--radius-sm); overflow: hidden; transition: .2s; }
.faq-item[open] { border-color: rgba(47, 107, 255, .35); box-shadow: var(--shadow-sm); }
.faq-item summary {
    display: flex; align-items: center; gap: 12px; cursor: pointer; list-style: none;
    padding: 17px 20px; font-weight: 600; font-size: 15.5px; color: var(--ink);
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-q {
    flex: 0 0 auto; font-size: 12px; font-weight: 800; color: var(--brand);
    background: rgba(47, 107, 255, .10); border-radius: 8px; padding: 3px 8px;
}
.faq-arrow { margin-left: auto; width: 9px; height: 9px; border-right: 2px solid var(--ink-3); border-bottom: 2px solid var(--ink-3); transform: rotate(45deg); transition: .25s; }
.faq-item[open] .faq-arrow { transform: rotate(225deg); border-color: var(--brand); }
.faq-a { padding: 0 20px 18px 20px; }
.faq-a p { font-size: 14.5px; color: var(--ink-2); margin: 0; }

/* ---------------- CTA ---------------- */
.cta-band { background: var(--grad); color: #fff; padding: 36px 0; margin-top: 0; position: relative; overflow: hidden; }
.cta-band::after {
    content: ""; position: absolute; inset: 0;
    background-image: radial-gradient(circle at 85% 20%, rgba(255, 255, 255, .22), transparent 45%);
}
.cta-band-sm { padding: 30px 0; }
.cta-inner { display: flex; align-items: center; justify-content: space-between; gap: 24px; flex-wrap: wrap; position: relative; z-index: 1; }
.cta-band h2 { color: #fff; font-size: clamp(21px, 2.6vw, 28px); margin-bottom: 6px; }
.cta-band p { color: rgba(255, 255, 255, .88); margin: 0; font-size: 15px; }

/* ---------------- 列表页头 ---------------- */
.page-head { padding: 44px 0 30px; background: linear-gradient(180deg, #f2f7ff, #f5f8ff); border-bottom: 1px solid var(--line); }
.page-head h1 { font-size: clamp(24px, 3.4vw, 34px); font-weight: 800; }
.page-head p { color: var(--ink-2); max-width: 760px; margin: 0; font-size: 15.5px; }
.page-head-actions { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 18px; }
.brand-head { position: relative; overflow: hidden; }
.brand-head::after {
    content: ""; position: absolute; right: -80px; top: -80px; width: 320px; height: 320px;
    border-radius: 50%; background: var(--c, var(--grad)); opacity: .10;
}
.bh-telecom { --c: var(--telecom); }
.bh-mobile { --c: var(--mobile); }
.bh-unicom { --c: var(--unicom); }
.bh-cbn { --c: var(--cbn); }

/* ---------------- 筛选 ---------------- */
.filters {
    display: flex; flex-wrap: wrap; gap: 16px; align-items: flex-end;
    background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
    padding: 18px 20px; box-shadow: var(--shadow-sm); margin-bottom: 22px;
}
.filter-group { display: flex; flex-direction: column; gap: 7px; }
.filter-label { font-size: 12.5px; color: var(--ink-3); font-weight: 600; letter-spacing: .04em; }
.seg { display: flex; flex-wrap: wrap; gap: 7px; }
.seg a {
    font-size: 14px; padding: 7px 15px; border-radius: 999px; color: var(--ink-2);
    background: var(--bg-soft); border: 1px solid transparent; transition: .18s;
}
.seg a:hover { color: var(--brand); }
.seg a.is-on { background: var(--grad); color: #fff; font-weight: 600; }
.input {
    font: inherit; font-size: 14.5px; padding: 9px 14px; border: 1px solid var(--line);
    border-radius: 10px; background: #fff; color: var(--ink); min-width: 190px; outline: none;
    transition: .18s;
}
.input:focus { border-color: var(--brand); box-shadow: 0 0 0 3px rgba(47, 107, 255, .15); }
.input-lg { padding: 13px 18px; font-size: 16px; min-width: 0; }
select.input { cursor: pointer; }

/* ---------------- SEO 文本块 ---------------- */
.seo-block {
    margin-top: 40px; background: #fff; border: 1px solid var(--line);
    border-radius: var(--radius); padding: 26px 28px;
}
.seo-block h2 { font-size: 20px; margin-bottom: 12px; }
.seo-block p { font-size: 14.5px; color: var(--ink-2); }
.seo-block p:last-child { margin-bottom: 0; }

/* ---------------- 套餐详情 ---------------- */
.plan-hero { background: linear-gradient(180deg, #f2f7ff, #f7faff); border-bottom: 1px solid var(--line); padding: 34px 0 44px; }
.plan-hero-grid { display: grid; grid-template-columns: 1.25fr .75fr; gap: 30px; align-items: start; }
.ph-badges { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 14px; }
.ph-badges .badge, .ph-badges .mini-brand { font-size: 12.5px; }
.plan-hero h1 { font-size: clamp(25px, 3.4vw, 36px); font-weight: 800; margin-bottom: 10px; }
.ph-sum { font-size: 15.5px; color: var(--ink-2); max-width: 640px; }
.ph-price {
    display: flex; align-items: baseline; gap: 8px; flex-wrap: wrap; margin: 20px 0;
    padding: 16px 20px; background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
    box-shadow: var(--shadow-sm);
}
.pp-label { font-size: 13px; color: var(--ink-3); }
.ph-price .cny { color: var(--brand); font-weight: 700; font-size: 18px; }
.ph-price .num { font-size: 44px; font-weight: 800; color: var(--brand); letter-spacing: -.03em; line-height: 1; }
.ph-price .per { color: var(--ink-3); font-size: 14px; }
.ph-price del { color: var(--ink-3); font-size: 14px; }
.pp-data { margin-left: auto; font-weight: 700; color: var(--ink); background: rgba(47, 107, 255, .10); padding: 6px 14px; border-radius: 999px; font-size: 14px; }
.ph-actions { display: flex; gap: 12px; flex-wrap: wrap; margin-bottom: 14px; }
.ph-note { font-size: 13px; color: var(--ink-3); margin: 0; }
.ph-card { padding: 22px; position: sticky; top: 86px; }
.ph-card-title { font-size: 17px; margin-bottom: 14px; }
.spec-table { width: 100%; border-collapse: collapse; font-size: 14.5px; margin-bottom: 18px; }
.spec-table th, .spec-table td { padding: 11px 4px; border-bottom: 1px dashed var(--line); text-align: left; vertical-align: top; }
.spec-table th { color: var(--ink-3); font-weight: 500; white-space: nowrap; width: 82px; }
.spec-table td { color: var(--ink); font-weight: 600; }

/* ---------------- 详情布局 ---------------- */
.detail-grid { display: grid; grid-template-columns: 1fr 320px; gap: 26px; align-items: start; }
.card-block {
    background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
    padding: 26px 28px; margin-bottom: 22px;
}
.card-block h2 {
    font-size: 20px; padding-bottom: 14px; margin-bottom: 18px; border-bottom: 2px solid var(--bg-soft);
    position: relative;
}
.card-block h2::after {
    content: ""; position: absolute; left: 0; bottom: -2px; width: 54px; height: 2px; background: var(--grad);
}
.check-list, .num-list, .tick-list, .side-links { list-style: none; }
.check-list li, .tick-list li { position: relative; padding-left: 26px; margin-bottom: 11px; font-size: 14.5px; color: var(--ink-2); }
.check-list li::before, .tick-list li::before {
    content: "✓"; position: absolute; left: 0; top: 0; color: var(--ok); font-weight: 800;
}
.num-list { counter-reset: n; }
.num-list li { counter-increment: n; position: relative; padding-left: 34px; margin-bottom: 12px; font-size: 14.5px; color: var(--ink-2); }
.num-list li::before {
    content: counter(n); position: absolute; left: 0; top: 1px; width: 22px; height: 22px;
    background: rgba(47, 107, 255, .10); color: var(--brand); border-radius: 7px;
    display: grid; place-items: center; font-size: 12px; font-weight: 800;
}
.tip { background: linear-gradient(120deg, rgba(47, 107, 255, .07), rgba(18, 211, 232, .07)); border-left: 3px solid var(--brand); padding: 13px 16px; border-radius: 0 10px 10px 0; font-size: 14px; color: var(--ink-2); margin: 18px 0 0; }

.side-box { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 22px; margin-bottom: 20px; }
.side-box h2 { font-size: 16.5px; margin-bottom: 14px; }
.side-box-alt { background: linear-gradient(160deg, #f5f9ff, #fff); }
.side-list li { list-style: none; border-bottom: 1px dashed var(--line); }
.side-list li:last-child { border-bottom: 0; }
.side-list a { display: grid; grid-template-columns: 1fr auto auto; gap: 8px; align-items: center; padding: 11px 2px; font-size: 13.5px; }
.side-list a:hover .sl-name { color: var(--brand); }
.sl-name { color: var(--ink); font-weight: 600; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.sl-data { color: var(--brand); font-weight: 700; font-size: 12.5px; }
.sl-price { color: var(--ink); font-weight: 800; }
.sl-price::before { content: "¥"; font-size: 11px; }
.side-more { display: inline-block; margin-top: 12px; font-size: 13.5px; font-weight: 600; }
.side-links li { margin-bottom: 10px; font-size: 13.8px; }
.side-links a { color: var(--ink-2); }
.side-links a:hover { color: var(--brand); }
.layout-2col { display: grid; grid-template-columns: 1fr 300px; gap: 28px; align-items: start; }
.sub-h2 { font-size: 20px; margin: 30px 0 16px; }

/* ---------------- 文章 ---------------- */
.article { padding: 34px 0 60px; }
.art-head { margin-bottom: 24px; }
.art-meta { display: flex; flex-wrap: wrap; align-items: center; gap: 12px; font-size: 13.5px; color: var(--ink-3); margin-bottom: 14px; }
.art-head h1 { font-size: clamp(26px, 3.6vw, 38px); font-weight: 800; line-height: 1.3; }
.art-lead {
    font-size: 16px; color: var(--ink-2); background: #fff; border: 1px solid var(--line);
    border-left: 3px solid var(--brand); border-radius: 0 12px 12px 0; padding: 14px 18px; margin: 18px 0 0;
}
.toc {
    background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
    padding: 18px 22px; margin-bottom: 26px;
}
.toc strong { display: block; font-size: 14.5px; color: var(--brand); margin-bottom: 10px; letter-spacing: .05em; }
.toc ol { list-style: none; columns: 2; column-gap: 26px; }
.toc li { margin-bottom: 7px; break-inside: avoid; font-size: 14px; }
.toc li.lvl-3 { padding-left: 14px; font-size: 13.5px; }
.toc a { color: var(--ink-2); }
.toc a:hover { color: var(--brand); }

.art-body {
    background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
    padding: 30px 32px; font-size: 16px; color: #1c2c44; line-height: 1.85;
}
.art-body h2 {
    font-size: 22px; margin: 34px 0 14px; padding-left: 13px; border-left: 4px solid var(--brand);
}
.art-body h3 { font-size: 18px; margin: 26px 0 12px; color: var(--ink); }
.art-body h4 { font-size: 16px; margin: 20px 0 10px; }
.art-body p { margin: 0 0 16px; }
.art-body ul, .art-body ol { padding-left: 24px; margin: 0 0 16px; }
.art-body li { margin-bottom: 8px; }
.art-body strong { color: #0a1a2f; background: rgba(47, 107, 255, .08); padding: 0 4px; border-radius: 4px; }
.art-body a { color: var(--brand); border-bottom: 1px dashed rgba(47, 107, 255, .4); }
.blockquote, .art-body blockquote {
    background: var(--bg-soft); border-left: 4px solid var(--brand-2); margin: 0 0 16px;
    padding: 13px 18px; border-radius: 0 10px 10px 0; color: var(--ink-2);
}
.art-body table { width: 100%; border-collapse: collapse; margin: 0 0 18px; font-size: 14.5px; }
.art-body th, .art-body td { border: 1px solid var(--line); padding: 10px 12px; text-align: left; }
.art-body th { background: var(--bg-soft); font-weight: 700; }
.art-body tr:nth-child(even) td { background: #fafcff; }
.art-body img { border-radius: 12px; margin: 8px 0 16px; display: block; }
.art-body pre { background: #0f1b30; color: #d7e3f6; padding: 16px 18px; border-radius: 12px; overflow-x: auto; font-size: 14px; }
.art-body code { font-family: "SF Mono", Consolas, monospace; font-size: .93em; }
.art-body hr { border: 0; border-top: 1px dashed var(--line); margin: 26px 0; }

.art-tags { display: flex; flex-wrap: wrap; gap: 9px; align-items: center; margin: 24px 0 18px; font-size: 14px; color: var(--ink-3); }
.tag { font-size: 13px; background: #fff; border: 1px solid var(--line); padding: 5px 13px; border-radius: 999px; color: var(--ink-2); }
.tag:hover { border-color: var(--brand); color: var(--brand); }
.art-share { display: flex; gap: 12px; flex-wrap: wrap; margin-bottom: 26px; }
.art-nav { display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; border-top: 1px solid var(--line); padding-top: 20px; margin-bottom: 30px; font-size: 14px; }
.art-nav a { color: var(--ink-2); max-width: 48%; }
.art-nav a:hover { color: var(--brand); }
.art-plans h2, .art-related h2 { font-size: 21px; margin-bottom: 18px; }
.art-plans, .art-related { margin-bottom: 34px; }

.page-body h2 { font-size: 22px; margin: 30px 0 12px; }
.page-body h3 { font-size: 18px; margin: 22px 0 10px; }

/* ---------------- 搜索 ---------------- */
.search-form { display: flex; gap: 12px; max-width: 620px; margin-top: 20px; }
.search-form .input { flex: 1; }

/* ---------------- 分页 ---------------- */
.pagination { margin-top: 34px; }
.pagination ul { display: flex; flex-wrap: wrap; gap: 8px; justify-content: center; list-style: none; }
.pagination a, .pagination span {
    display: inline-flex; align-items: center; justify-content: center; min-width: 40px; height: 40px;
    padding: 0 12px; border-radius: 11px; font-size: 14.5px; background: #fff;
    border: 1px solid var(--line); color: var(--ink-2);
}
.pagination a:hover { border-color: var(--brand); color: var(--brand); }
.pagination .current { background: var(--grad); color: #fff; border-color: transparent; font-weight: 700; }
.pagination .disabled, .pagination .dots { background: transparent; border-color: transparent; color: var(--ink-3); }

/* ---------------- 404 ---------------- */
.notfound { padding: 80px 0 100px; text-align: center; }
.nf-code {
    font-size: 96px; font-weight: 800; line-height: 1; margin: 0 0 10px;
    background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent;
}
.notfound h1 { font-size: 26px; }
.notfound p { color: var(--ink-2); }
.nf-actions { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; margin: 24px 0 30px; }
.nf-links { display: flex; gap: 18px; justify-content: center; flex-wrap: wrap; font-size: 14.5px; }

/* ---------------- 底部 ---------------- */
.site-footer { background: #0a1730; color: #a9bcd8; padding: 54px 0 26px; margin-top: 0; }
.footer-grid { display: grid; grid-template-columns: 1.5fr 1fr 1fr 1fr; gap: 32px; padding-bottom: 34px; border-bottom: 1px solid rgba(255, 255, 255, .09); }
.footer-col h3 { color: #fff; font-size: 15.5px; margin-bottom: 16px; }
.footer-col ul { list-style: none; }
.footer-col li { margin-bottom: 10px; font-size: 14px; }
.footer-col a { color: #a9bcd8; }
.footer-col a:hover { color: #fff; }
.footer-about p { font-size: 13.8px; line-height: 1.8; color: #93a8c8; }
.footer-logo { margin-bottom: 14px; }
.footer-logo .logo-text strong { color: #fff; font-size: 18px; }
.footer-contact { list-style: none; font-size: 13.5px; color: #93a8c8; }
.footer-bottom { padding-top: 22px; text-align: center; }
.footer-note { font-size: 12.8px; color: #7e93b5; max-width: 900px; margin: 0 auto 10px; }
.footer-copy { font-size: 13px; color: #304e7d; margin: 0; }
.footer-copy a { color: #8fa4c4; }

/* ---------------- 悬浮工具 ---------------- */
.float-tools { position: fixed; right: 18px; bottom: 22px; display: flex; flex-direction: column; gap: 10px; z-index: 90; }
.float-btn {
    width: 44px; height: 44px; border-radius: 14px; display: grid; place-items: center;
    background: rgba(255, 255, 255, .92); border: 1px solid var(--line); color: var(--brand);
    box-shadow: var(--shadow); transition: .2s;
}
.float-btn:hover { transform: translateY(-3px); color: #1646c0; }
.float-top { opacity: 0; visibility: hidden; transform: translateY(8px); }
.float-top.is-show { opacity: 1; visibility: visible; transform: translateY(0); }

/* ---------------- 响应式 ---------------- */
@media (max-width: 1080px) {
    .brand-grid, .why-grid { grid-template-columns: repeat(2, 1fr); }
    .plan-grid, .post-grid { grid-template-columns: repeat(2, 1fr); }
    .steps { grid-template-columns: repeat(2, 1fr); }
    .steps li:not(:last-child)::after { display: none; }
    .footer-grid { grid-template-columns: repeat(2, 1fr); }
    .detail-grid { grid-template-columns: 1fr; }
    .layout-2col { grid-template-columns: 1fr; }
    .col-side { display: grid; grid-template-columns: repeat(2, 1fr); gap: 18px; }
}

@media (max-width: 900px) {
    .hero-grid { grid-template-columns: minmax(0, 1fr); gap: 24px; }
    .hero-visual { min-height: auto; }
    /* 悬浮小卡在窄屏会压住主卡片，统一隐藏 */
    .card-float, .card-float2 { display: none; }
    .plan-hero-grid { grid-template-columns: 1fr; }
    .ph-card { position: static; }
    .brand-grid-sm { grid-template-columns: repeat(2, 1fr); }
    .header-cta { display: none; }
    .nav-toggle {
        display: flex; flex-direction: column; justify-content: center; gap: 5px;
        width: 42px; height: 42px; border: 1px solid var(--line); background: #fff;
        border-radius: 12px; cursor: pointer; padding: 0 10px; margin-left: auto;
    }
    .nav-toggle i { display: block; height: 2px; background: var(--ink); border-radius: 2px; transition: .25s; }
    .nav-toggle[aria-expanded="true"] i:nth-child(2) { transform: translateY(7px) rotate(45deg); }
    .nav-toggle[aria-expanded="true"] i:nth-child(3) { opacity: 0; }
    .nav-toggle[aria-expanded="true"] i:nth-child(4) { transform: translateY(-7px) rotate(-45deg); }
    .main-nav {
        position: absolute; top: 68px; left: 0; right: 0; background: #fff;
        border-bottom: 1px solid var(--line); box-shadow: var(--shadow); padding: 10px 16px 16px;
        display: none;
    }
    .main-nav.is-open { display: block; }
    .main-nav > ul { flex-direction: column; align-items: stretch; gap: 2px; }
    .main-nav a { padding: 12px 14px; font-size: 15.5px; }
    .sub-menu { position: static; opacity: 1; visibility: visible; transform: none; box-shadow: none; border: 0; padding: 0 0 0 14px; }
    .site-header { position: sticky; }
    .header-inner { position: relative; }
}

@media (max-width: 720px) {
    .section { padding: 36px 0; }
    .sec-head { margin-bottom: 22px; }
    .sec-more { margin-top: 18px; }
    .plan-grid, .post-grid, .post-grid-sm, .brand-grid, .brand-grid-sm, .why-grid, .steps { grid-template-columns: 1fr; }
    .header-inner { height: 56px; gap: 12px; }
    .main-nav { top: 56px; }
    .logo-text strong { font-size: 17px; }
    .logo-text small { font-size: 10px; }
    .nav-toggle { width: 38px; height: 38px; border-radius: 10px; padding: 0 9px; }
    .main-nav a { padding: 11px 12px; font-size: 15px; }
    .hero { padding: 26px 0 32px; }
    .hero h1 { font-size: 24px; margin-bottom: 12px; }
    .hero-eyebrow { font-size: 12px; padding: 5px 12px; margin-bottom: 10px; }
    .hero-sub { font-size: 14.5px; margin-bottom: 14px; }
    .hero-pills { gap: 8px; margin-bottom: 16px; }
    .hero-pills li { font-size: 12.5px; padding: 6px 11px; }
    .hero-actions { gap: 10px; margin-bottom: 20px; }
    .hero-actions .btn { flex: 1; }
    .btn-lg { padding: 11px 20px; font-size: 15px; }
    .hero-stats { grid-template-columns: repeat(2, 1fr); gap: 14px; }
    .hero-stats .num { font-size: 22px; }
    .hero-stats dd { font-size: 12px; }
    .card-main { padding: 16px; }
    .cc-row { padding: 10px; gap: 8px; font-size: 12.5px; margin-bottom: 8px; }
    .card-new { padding: 14px 16px; margin-top: 12px; }
    .new-list time { display: none; }
    .strip-inner { gap: 10px; padding: 11px 16px; font-size: 12.5px; }
    .plan-price .num { font-size: 28px; }
    .plan-card { padding: 16px; }
    .cta-band { padding: 32px 0; }
    .cta-band .btn { width: 100%; }
    .col-side { grid-template-columns: 1fr; }
    .toc ol { columns: 1; }
    .art-body, .card-block { padding: 22px 18px; }
    .filters { flex-direction: column; align-items: stretch; }
    .filter-brands { overflow-x: auto; -webkit-overflow-scrolling: touch; }
    .seg { flex-wrap: nowrap; }
    .input { min-width: 0; width: 100%; }
    .search-form { flex-direction: column; }
    .ph-price { flex-direction: column; align-items: flex-start; gap: 6px; }
    .pp-data { margin-left: 0; }
    .cta-inner { flex-direction: column; align-items: flex-start; }
    .footer-grid { grid-template-columns: 1fr; gap: 24px; }
    .art-nav a { max-width: 100%; }
}

@media (max-width: 480px) {
    /* 44px 悬浮按钮正好压住卡片右上角，窄屏只保留回顶部 */
    .float-tools .float-btn:not(.float-top) { display: none; }
    .container { padding: 0 16px; }
    .section { padding: 28px 0; }
    .sec-head { margin-bottom: 18px; }
    .sec-head h2 { font-size: 21px; }
    .hero { padding: 22px 0 28px; }
    .hero h1 { font-size: 22px; }
    .hero-actions { flex-direction: column; }
    .hero-actions .btn { width: 100%; flex: none; }
    .hero-stats { gap: 12px; }
    .strip-inner { font-size: 12px; padding: 10px 14px; }
    .plan-price .num { font-size: 26px; }
    .plan-data .data-num { font-size: 19px; }
    .pagination a, .pagination span { min-width: 36px; height: 36px; font-size: 14px; }
    .float-tools { right: 12px; bottom: 16px; }
    .float-btn { width: 40px; height: 40px; border-radius: 12px; }
}

@media (prefers-reduced-motion: reduce) {
    * { animation: none !important; transition: none !important; scroll-behavior: auto !important; }
}