/*
 * DocFlow 核心样式：白底极简、商务大气，PC 优先并适配手机浏览器。
 */

:root {
    --brand: #2563eb;
    --brand-dark: #1e40af;
    --brand-light: #3b82f6;
    --brand-soft: #e8f0ff;
    --accent: #7c3aed;
    --ink: #111827;
    --ink-soft: #475569;
    --ink-light: #64748b;
    --line: #e6ebf4;
    --line-soft: #eef1f8;
    --card: #ffffff;
    --canvas: #f8fafc;
    --ok: #059669;
    --warn: #f97316;
    --radius-lg: 24px;
    --radius: 16px;
    --radius-sm: 12px;
    --shadow-sm: 0 2px 8px rgba(17, 24, 39, .05);
    --shadow: 0 12px 32px rgba(17, 24, 39, .07);
    --shadow-lg: 0 26px 70px rgba(17, 24, 39, .12);
    --shell: 1200px;
    --font: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
    margin: 0;
    font-family: var(--font);
    background: linear-gradient(180deg, #ffffff 0%, var(--canvas) 46%, var(--canvas) 100%);
    color: var(--ink);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
h1, h2, h3 { margin: 0; line-height: 1.22; letter-spacing: -.02em; font-weight: 800; }
p { margin: 0; }
img, canvas { max-width: 100%; display: block; }
button, input, select { font-family: inherit; font-size: 15px; }
:focus-visible { outline: 3px solid rgba(37, 99, 235, .45); outline-offset: 2px; }
.shell { width: min(var(--shell), calc(100% - 48px)); margin: 0 auto; }
.eyebrow {
    display: inline-flex; align-items: center; gap: 8px;
    font-size: 13px; font-weight: 700; color: var(--brand);
    background: var(--brand-soft); padding: 7px 14px; border-radius: 999px;
}
.eyebrow i { width: 6px; height: 6px; border-radius: 50%; background: var(--brand); }
.eyebrow.light { background: rgba(255, 255, 255, .14); color: #fff; }
.primary-button, .secondary-button {
    display: inline-flex; align-items: center; justify-content: center; gap: 8px;
    min-height: 46px; padding: 0 24px; border-radius: 14px; border: 1px solid transparent;
    font-weight: 700; font-size: 15px; cursor: pointer; transition: .18s ease;
}
.primary-button { background: var(--ink); color: #fff; box-shadow: 0 8px 20px rgba(17, 24, 39, .18); }
.primary-button:hover { background: #020617; transform: translateY(-1px); }
.primary-button.inverse { background: #fff; color: var(--ink); }
.secondary-button { background: #fff; border-color: var(--line); color: var(--ink); }
.secondary-button:hover { border-color: var(--brand); color: var(--brand); }
.primary-button[disabled] { opacity: .45; cursor: not-allowed; transform: none; }
.full { display: flex; width: 100%; }
.text-button { background: none; border: none; color: var(--brand); font-weight: 700; font-size: 14px; cursor: pointer; padding: 0; }

/* ===================== 头部导航 ===================== */
.site-header { position: sticky; top: 0; z-index: 60; background: rgba(255, 255, 255, .88); backdrop-filter: blur(14px); border-bottom: 1px solid var(--line-soft); }
.nav-wrap { display: flex; align-items: center; gap: 24px; min-height: 68px; }
.brand { display: inline-flex; align-items: center; gap: 12px; flex: 0 0 auto; }
.brand span { display: grid; line-height: 1.1; }
.brand strong { font-size: 18px; letter-spacing: -.02em; }
.brand small { font-size: 12px; color: var(--ink-light); }
.brand-mark { position: relative; width: 36px; height: 36px; border-radius: 12px; background: var(--ink); display: grid; place-items: center; }
.brand-mark i { position: absolute; background: #fff; border-radius: 3px; }
.brand-mark i:nth-child(1) { width: 14px; height: 4px; top: 9px; }
.brand-mark i:nth-child(2) { width: 10px; height: 4px; top: 16px; }
.brand-mark i:nth-child(3) { width: 6px; height: 4px; top: 23px; }
.main-nav { display: flex; gap: 6px; margin-left: auto; }
.main-nav a { padding: 9px 14px; border-radius: 11px; font-size: 14px; font-weight: 600; color: var(--ink-soft); }
.main-nav a:hover { background: var(--canvas); color: var(--brand); }
.quota-pill {
    display: inline-flex; align-items: center; gap: 9px; min-height: 40px; padding: 0 16px;
    border: 1px solid var(--line); background: #fff; border-radius: 999px;
    font-size: 13px; font-weight: 700; color: var(--ink); cursor: pointer; transition: .18s;
}
.quota-pill:hover { border-color: var(--brand); color: var(--brand); }
.quota-dot { width: 8px; height: 8px; border-radius: 50%; background: var(--ok); box-shadow: 0 0 0 4px rgba(5, 150, 105, .16); }
.quota-dot.low { background: var(--warn); box-shadow: 0 0 0 4px rgba(249, 115, 22, .16); }
.nav-toggle { display: none; margin-left: auto; width: 40px; height: 40px; border: 1px solid var(--line); border-radius: 12px; background: #fff; cursor: pointer; }
.nav-toggle span { display: block; width: 16px; height: 2px; background: var(--ink); margin: 3px auto; border-radius: 2px; }

/* ===================== 首页 ===================== */
.hero { position: relative; padding: clamp(48px, 6vw, 92px) 0 clamp(40px, 5vw, 68px); overflow: hidden; }
.hero-orb { position: absolute; border-radius: 50%; filter: blur(60px); opacity: .5; }
.orb-one { width: 460px; height: 460px; background: rgba(37, 99, 235, .16); top: -170px; left: -110px; }
.orb-two { width: 420px; height: 420px; background: rgba(124, 58, 237, .14); top: 90px; right: -140px; }
.hero-grid { position: relative; display: grid; grid-template-columns: 1.05fr .95fr; gap: clamp(28px, 4vw, 60px); align-items: center; }
.hero-copy h1 { margin: 22px 0 18px; font-size: clamp(38px, 5.4vw, 68px); letter-spacing: -.035em; }
.hero-copy h1 em { font-style: normal; background: linear-gradient(96deg, var(--brand), var(--accent)); -webkit-background-clip: text; background-clip: text; color: transparent; }
.hero-copy > p { font-size: clamp(16px, 1.4vw, 19px); color: var(--ink-soft); max-width: 30em; }
.hero-actions { display: flex; align-items: center; gap: 22px; margin-top: 32px; flex-wrap: wrap; }
.trust-row { display: flex; gap: 22px; margin-top: 34px; flex-wrap: wrap; }
.trust-row span { display: inline-flex; align-items: center; gap: 8px; font-size: 14px; font-weight: 600; color: var(--ink-soft); }
.trust-row b { width: 20px; height: 20px; border-radius: 50%; background: rgba(5, 150, 105, .12); color: var(--ok); font-size: 12px; display: grid; place-items: center; }
.hero-visual { position: relative; }
.visual-window { background: #fff; border: 1px solid var(--line); border-radius: var(--radius-lg); box-shadow: var(--shadow-lg); overflow: hidden; }
.window-head { display: flex; align-items: center; gap: 6px; padding: 12px 16px; background: var(--canvas); border-bottom: 1px solid var(--line-soft); }
.window-head span { width: 10px; height: 10px; border-radius: 50%; background: #dbe3ef; }
.window-head b { margin-left: 12px; font-size: 12px; font-weight: 500; color: var(--ink-light); }
.window-body { position: relative; padding: 26px; min-height: 288px; display: grid; gap: 12px; }
.mini-file { display: flex; align-items: center; gap: 14px; padding: 14px 16px; border: 1px solid var(--line-soft); border-radius: var(--radius); background: var(--canvas); }
.mini-file i { font-style: normal; font-size: 11px; font-weight: 800; padding: 6px 8px; border-radius: 8px; background: #fff; color: var(--brand); border: 1px solid var(--brand-soft); }
.mini-file span { flex: 1; display: grid; gap: 5px; }
.mini-file span b { height: 7px; border-radius: 4px; background: #e3e9f4; }
.mini-file span b:nth-child(2) { width: 78%; }
.mini-file span b:nth-child(3) { width: 52%; }
.file-a { transform: translateX(-6px); }
.file-b { transform: translateX(6px); }
.flow-line { position: absolute; left: 46px; top: 74px; bottom: 74px; width: 2px; background: repeating-linear-gradient(180deg, var(--brand) 0 6px, transparent 6px 12px); opacity: .35; }
.result-box { margin-top: 4px; display: flex; align-items: center; gap: 12px; padding: 14px 16px; border-radius: var(--radius); background: rgba(5, 150, 105, .08); border: 1px solid rgba(5, 150, 105, .2); }
.result-box span { width: 28px; height: 28px; border-radius: 9px; background: var(--ok); color: #fff; display: grid; place-items: center; font-size: 15px; font-weight: 700; }
.result-box strong { font-size: 14px; }
.result-box small { display: block; font-size: 12px; color: var(--ink-light); }
.privacy-float { position: absolute; bottom: -22px; left: -26px; display: flex; align-items: center; gap: 12px; padding: 14px 18px; background: var(--ink); color: #fff; border-radius: var(--radius); box-shadow: var(--shadow-lg); }
.privacy-float span { font-size: 18px; }
.privacy-float strong { font-size: 14px; display: block; }
.privacy-float small { font-size: 12px; opacity: .72; }

.promise-strip { padding: 8px 0 12px; }
.promise-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.promise-grid > div { background: #fff; border: 1px solid var(--line-soft); border-radius: var(--radius); padding: 20px; display: flex; gap: 14px; align-items: center; box-shadow: var(--shadow-sm); }
.promise-icon { font-size: 13px; font-weight: 800; color: var(--brand); background: var(--brand-soft); width: 34px; height: 34px; border-radius: 11px; display: grid; place-items: center; flex: 0 0 auto; }
.promise-grid strong { display: block; font-size: 15px; }
.promise-grid small { display: block; font-size: 13px; color: var(--ink-light); }

.section { padding: clamp(52px, 6vw, 92px) 0; }
.section-heading { display: flex; justify-content: space-between; align-items: flex-end; gap: 26px; margin-bottom: 34px; flex-wrap: wrap; }
.section-heading h2 { font-size: clamp(26px, 3.1vw, 40px); margin-top: 14px; }
.section-heading p { color: var(--ink-light); max-width: 30em; font-size: 15px; }
.section-heading.centered { justify-content: center; text-align: center; }
.section-heading.centered p { margin: 0 auto; }

.tool-group { margin-bottom: 40px; }
.group-title { display: flex; align-items: center; gap: 14px; margin-bottom: 18px; }
.group-title h3 { font-size: 17px; }
.group-title span { font-size: 12px; color: var(--ink-light); background: var(--canvas); border: 1px solid var(--line-soft); padding: 3px 10px; border-radius: 999px; }
.tool-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(276px, 1fr)); gap: 18px; }
.tool-card { position: relative; display: grid; grid-template-columns: auto 1fr auto; gap: 16px; align-items: center; padding: 22px; background: #fff; border: 1px solid var(--line-soft); border-radius: var(--radius); transition: .18s; box-shadow: var(--shadow-sm); }
.tool-card:hover { transform: translateY(-3px); border-color: rgba(37, 99, 235, .4); box-shadow: var(--shadow); }
.tool-icon { width: 44px; height: 44px; border-radius: 13px; display: grid; place-items: center; background: var(--brand-soft); color: var(--brand); flex: 0 0 auto; }
.tool-icon i { width: 18px; height: 18px; border: 2.4px solid currentColor; border-radius: 5px; }
.tool-icon.icon-word i { border-radius: 2px; height: 22px; }
.tool-icon.icon-image i { border-radius: 50% 50% 4px 4px; }
.tool-icon.icon-ocr i { border-radius: 3px; height: 22px; }
.tool-icon.icon-split i { border-radius: 3px; width: 22px; }
.tool-icon.icon-excel i { border-radius: 3px; width: 20px; }
.tool-icon.large { width: 64px; height: 64px; border-radius: 18px; }
.tool-icon.large i { width: 24px; height: 24px; }
.tool-card-copy strong { display: block; font-size: 16px; }
.tool-card-copy small { display: block; margin-top: 5px; font-size: 13px; color: var(--ink-light); line-height: 1.5; }
.card-arrow { color: #cbd5e1; font-size: 15px; transition: .18s; }
.tool-card:hover .card-arrow { color: var(--brand); transform: translate(2px, -2px); }

.privacy-banner { padding: 14px 0 clamp(52px, 6vw, 88px); }
.privacy-banner-grid { position: relative; display: grid; grid-template-columns: 220px 1fr 190px; gap: 34px; align-items: center; padding: clamp(30px, 4vw, 52px); border-radius: 30px; background: radial-gradient(120% 140% at 12% 0%, #1d4ed8 0%, #111827 62%); color: #fff; overflow: hidden; }
.privacy-banner-grid h2 { font-size: clamp(24px, 3vw, 36px); margin: 16px 0 14px; }
.privacy-banner-grid p { color: rgba(255, 255, 255, .78); font-size: 15px; max-width: 40em; }
.light-link { display: inline-block; margin-top: 20px; font-weight: 700; font-size: 14px; border-bottom: 1px solid rgba(255, 255, 255, .4); padding-bottom: 2px; }
.shield-visual { position: relative; height: 200px; display: grid; place-items: center; }
.shield-ring { position: absolute; border-radius: 50%; border: 1px solid rgba(255, 255, 255, .22); }
.ring-a { width: 180px; height: 180px; }
.ring-b { width: 128px; height: 128px; border-color: rgba(255, 255, 255, .34); }
.shield-core { width: 74px; height: 74px; border-radius: 24px; background: rgba(255, 255, 255, .12); border: 1px solid rgba(255, 255, 255, .3); display: grid; place-items: center; font-size: 30px; font-weight: 700; }
.privacy-banner ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 12px; }
.privacy-banner li { display: flex; align-items: center; gap: 10px; padding: 11px 14px; border-radius: 12px; background: rgba(255, 255, 255, .09); font-size: 14px; font-weight: 600; }
.privacy-banner li span { color: #6ee7b7; }

.pricing-section { background: linear-gradient(180deg, rgba(255, 255, 255, 0) 0%, #fff 12%, #fff 100%); }
.pricing-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.price-card { position: relative; background: #fff; border: 1px solid var(--line); border-radius: var(--radius-lg); padding: 28px 24px; display: grid; gap: 14px; box-shadow: var(--shadow-sm); }
.price-card.featured { background: var(--ink); color: #fff; border-color: var(--ink); box-shadow: var(--shadow-lg); transform: translateY(-8px); }
.plan-name { font-size: 13px; font-weight: 700; color: var(--brand); letter-spacing: .04em; }
.price-card.featured .plan-name { color: #93c5fd; }
.popular { position: absolute; top: -12px; right: 20px; background: linear-gradient(96deg, var(--brand), var(--accent)); color: #fff; font-size: 12px; font-weight: 700; padding: 5px 12px; border-radius: 999px; }
.price small { font-size: 16px; color: var(--ink-light); }
.price-card.featured .price small { color: rgba(255, 255, 255, .7); }
.price strong { font-size: 42px; letter-spacing: -.04em; }
.price em { font-style: normal; font-size: 13px; color: var(--ink-light); margin-left: 4px; }
.price-card.featured .price em { color: rgba(255, 255, 255, .7); }
.price-card > p { font-size: 13px; color: var(--ink-light); }
.price-card ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 10px; font-size: 14px; }
.price-card li { display: flex; gap: 9px; align-items: flex-start; }
.price-card li::before { content: "✓"; color: var(--ok); font-weight: 800; }
.price-card.featured li::before { color: #6ee7b7; }
.price-card .full { margin-top: auto; }
.price-card.featured .primary-button { background: #fff; color: var(--ink); }
.addon-row { margin-top: 30px; display: flex; align-items: center; gap: 14px; flex-wrap: wrap; padding: 20px 24px; border: 1px dashed var(--line); border-radius: var(--radius); background: var(--canvas); }
.addon-row > span { font-size: 14px; color: var(--ink-soft); }
.addon-row b { color: var(--ink); }
.chip-button { border: 1px solid var(--line); background: #fff; border-radius: 999px; padding: 9px 18px; font-size: 13px; font-weight: 700; cursor: pointer; transition: .18s; }
.chip-button:hover { border-color: var(--brand); color: var(--brand); }

.final-cta { padding: 0 0 clamp(56px, 6vw, 92px); }
.final-cta .shell { display: flex; align-items: center; justify-content: space-between; gap: 30px; flex-wrap: wrap; padding: clamp(30px, 4vw, 48px); border-radius: 28px; background: var(--brand-soft); }
.final-cta h2 { font-size: clamp(24px, 3vw, 34px); margin: 14px 0 10px; }
.final-cta p { color: var(--ink-soft); }

/* ===================== 功能页 ===================== */
.tool-hero { position: relative; padding: 44px 0 24px; overflow: hidden; }
.tool-hero-orb { position: absolute; width: 420px; height: 420px; border-radius: 50%; right: -120px; top: -180px; background: rgba(37, 99, 235, .12); filter: blur(50px); }
.tool-hero-inner { position: relative; }
.breadcrumbs { display: flex; gap: 8px; font-size: 13px; color: var(--ink-light); margin-bottom: 22px; }
.breadcrumbs a:hover { color: var(--brand); }
.breadcrumbs b { color: var(--ink); }
.tool-title-row { display: flex; gap: 22px; align-items: center; }
.tool-title-row h1 { font-size: clamp(28px, 3.4vw, 44px); margin: 10px 0 10px; }
.tool-title-row p { color: var(--ink-soft); max-width: 40em; }
.workspace-section { padding: 22px 0 clamp(48px, 6vw, 84px); }
.workspace-grid { display: grid; grid-template-columns: 1fr 336px; gap: 24px; align-items: start; }
.workspace-card, .aside-card { background: #fff; border: 1px solid var(--line-soft); border-radius: var(--radius-lg); box-shadow: var(--shadow-sm); }
.workspace-card { padding: clamp(22px, 3vw, 34px); }
.upload-zone { position: relative; border: 2px dashed var(--line); border-radius: 22px; background: var(--canvas); padding: clamp(32px, 5vw, 56px) 24px; text-align: center; cursor: pointer; transition: .18s; }
.upload-zone:hover, .upload-zone.dragover { border-color: var(--brand); background: var(--brand-soft); }
.upload-zone input { position: absolute; inset: 0; opacity: 0; cursor: pointer; }
.upload-symbol { width: 66px; height: 66px; margin: 0 auto 18px; border-radius: 22px; background: #fff; border: 1px solid var(--line); display: grid; place-items: center; box-shadow: var(--shadow-sm); }
.upload-symbol span { font-size: 26px; color: var(--brand); font-weight: 700; }
.upload-zone h2 { font-size: 20px; }
.upload-zone p { margin-top: 8px; font-size: 14px; color: var(--ink-soft); }
.upload-zone p strong { color: var(--brand); }
.upload-zone small { display: block; margin-top: 12px; font-size: 12px; color: var(--ink-light); }
.file-list { display: grid; gap: 10px; margin-top: 20px; }
.file-item { display: grid; grid-template-columns: auto 1fr auto; gap: 12px; align-items: center; padding: 13px 15px; border: 1px solid var(--line-soft); border-radius: var(--radius); background: var(--canvas); }
.file-badge { font-size: 11px; font-weight: 800; padding: 5px 9px; border-radius: 8px; background: #fff; color: var(--brand); border: 1px solid var(--brand-soft); }
.file-meta { min-width: 0; }
.file-meta strong { display: block; font-size: 14px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.file-meta small { font-size: 12px; color: var(--ink-light); }
.file-remove { border: none; background: none; color: var(--ink-light); cursor: pointer; font-size: 18px; line-height: 1; padding: 4px 6px; border-radius: 8px; }
.file-remove:hover { color: #dc2626; background: #fee2e2; }
.parameter-panel { margin-top: 24px; border: 1px solid var(--line-soft); border-radius: var(--radius); padding: 20px; background: var(--canvas); }
.parameter-title { display: flex; align-items: baseline; gap: 12px; margin-bottom: 16px; }
.parameter-title span { font-size: 12px; color: var(--ink-light); }
.field-row { display: grid; gap: 10px; margin-bottom: 14px; }
.field-row > label { font-size: 14px; font-weight: 700; }
.field-row.inline-field { grid-template-columns: auto 96px auto; align-items: center; gap: 10px; }
.segmented { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; }
.segmented label { cursor: pointer; }
.segmented input { position: absolute; opacity: 0; pointer-events: none; }
.segmented span { display: block; text-align: center; padding: 11px 6px; border: 1px solid var(--line); border-radius: 12px; background: #fff; font-size: 13px; font-weight: 600; color: var(--ink-soft); transition: .16s; }
.segmented input:checked + span { border-color: var(--ink); background: var(--ink); color: #fff; }
.form-grid { display: grid; grid-template-columns: 1fr 110px 1fr; gap: 14px; }
.input-field { display: grid; gap: 7px; }
.input-field.wide { grid-column: 1 / -1; }
.input-field span { font-size: 13px; font-weight: 600; color: var(--ink-soft); }
.input-field span b { color: var(--brand); }
.input-field input { height: 44px; padding: 0 14px; border: 1px solid var(--line); border-radius: 12px; background: #fff; }
.input-field input[type="range"] { height: auto; padding: 0; border: none; background: none; accent-color: var(--brand); }
.field-row.inline-field input { height: 44px; padding: 0 12px; border: 1px solid var(--line); border-radius: 12px; background: #fff; }
.range-field { display: grid; gap: 10px; }
.range-field > div { display: flex; justify-content: space-between; font-size: 14px; font-weight: 600; }
.range-field input { accent-color: var(--brand); }
.range-field small { font-size: 12px; color: var(--ink-light); }
.progress-panel { margin-top: 22px; padding: 20px; border-radius: var(--radius); border: 1px solid var(--brand-soft); background: var(--brand-soft); }
.progress-head { display: flex; justify-content: space-between; align-items: center; gap: 14px; margin-bottom: 12px; }
.progress-head > div { display: flex; align-items: center; gap: 10px; }
.progress-head strong { font-size: 15px; }
.progress-head b { font-size: 18px; font-variant-numeric: tabular-nums; }
.status-spinner { width: 18px; height: 18px; border-radius: 50%; border: 2.4px solid rgba(37, 99, 235, .25); border-top-color: var(--brand); animation: spin .8s linear infinite; }
.status-spinner.done { border-color: var(--ok); border-top-color: var(--ok); animation: none; }
@keyframes spin { to { transform: rotate(360deg); } }
.progress-track { height: 9px; border-radius: 999px; background: rgba(37, 99, 235, .16); overflow: hidden; }
.progress-track i { display: block; height: 100%; width: 0; border-radius: 999px; background: linear-gradient(90deg, var(--brand), var(--accent)); transition: width .25s ease; }
.progress-panel p { margin-top: 10px; font-size: 13px; color: var(--ink-soft); }
.result-panel { margin-top: 22px; display: grid; grid-template-columns: auto 1fr auto; gap: 16px; align-items: center; padding: 20px; border-radius: var(--radius); border: 1px solid rgba(5, 150, 105, .25); background: rgba(5, 150, 105, .07); }
.result-check { width: 44px; height: 44px; border-radius: 14px; background: var(--ok); color: #fff; display: grid; place-items: center; font-size: 22px; font-weight: 700; }
.result-panel h3 { font-size: 16px; }
.result-panel p { margin-top: 4px; font-size: 13px; color: var(--ink-soft); }
.form-actions { margin-top: 24px; display: flex; justify-content: space-between; align-items: center; gap: 18px; flex-wrap: wrap; }
.quota-note { display: inline-flex; align-items: center; gap: 9px; font-size: 13px; color: var(--ink-soft); }
.process-button { min-width: 168px; }
.workspace-aside { display: grid; gap: 16px; }
.aside-card { padding: 22px; }
.aside-card strong { display: block; font-size: 15px; margin-bottom: 10px; }
.aside-card p, .aside-card ol { font-size: 13px; color: var(--ink-light); }
.aside-card ol { list-style: none; margin: 0; padding: 0; display: grid; gap: 11px; }
.aside-card li { display: flex; gap: 10px; align-items: center; }
.aside-card li span { width: 22px; height: 22px; border-radius: 8px; background: var(--brand-soft); color: var(--brand); font-size: 12px; font-weight: 800; display: grid; place-items: center; flex: 0 0 auto; }
.secure-card { background: linear-gradient(180deg, #f6f9ff, #fff); border-color: var(--brand-soft); }
.aside-icon { float: left; width: 34px; height: 34px; margin-right: 12px; border-radius: 11px; background: var(--ink); color: #fff; display: grid; place-items: center; font-size: 15px; }
.limit-card > div { display: flex; justify-content: space-between; font-size: 13px; padding: 7px 0; border-bottom: 1px dashed var(--line-soft); }
.limit-card > div:last-of-type { margin-bottom: 14px; }
.limit-card b { color: var(--ink); }
.tool-seo-section { padding: 12px 0 clamp(48px, 6vw, 80px); }
.seo-grid { display: grid; grid-template-columns: .9fr 1.1fr; gap: 34px; align-items: start; }
.seo-grid h2 { font-size: clamp(22px, 2.6vw, 32px); margin: 14px 0 14px; }
.seo-grid p { color: var(--ink-soft); font-size: 15px; }
.feature-list { display: grid; gap: 14px; }
.feature-list article { display: grid; grid-template-columns: auto 1fr; gap: 16px; padding: 20px; background: #fff; border: 1px solid var(--line-soft); border-radius: var(--radius); box-shadow: var(--shadow-sm); }
.feature-list span { font-size: 14px; font-weight: 800; color: var(--brand); }
.feature-list strong { display: block; font-size: 15px; }
.feature-list p { font-size: 13px; color: var(--ink-light); margin-top: 4px; }
.related-section { padding: 0 0 clamp(48px, 6vw, 84px); }
.related-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.related-grid a { display: grid; gap: 10px; padding: 20px; background: #fff; border: 1px solid var(--line-soft); border-radius: var(--radius); transition: .18s; }
.related-grid a:hover { transform: translateY(-2px); border-color: rgba(37, 99, 235, .4); box-shadow: var(--shadow); }
.related-grid strong { font-size: 15px; }
.related-grid small { font-size: 12px; color: var(--brand); }

/* ===================== 法律页 ===================== */
.legal-hero { padding: 48px 0 20px; }
.legal-hero h1 { font-size: clamp(30px, 4vw, 46px); margin: 16px 0 10px; }
.legal-hero p { color: var(--ink-light); font-size: 14px; }
.legal-section { padding: 18px 0 clamp(48px, 6vw, 84px); }
.legal-layout { display: grid; grid-template-columns: 216px 1fr; gap: 34px; align-items: start; }
.legal-layout aside { position: sticky; top: 92px; display: grid; gap: 4px; }
.legal-layout aside a { padding: 10px 14px; border-radius: 11px; font-size: 14px; color: var(--ink-soft); }
.legal-layout aside a:hover { background: #fff; color: var(--brand); }
.legal-layout article { background: #fff; border: 1px solid var(--line-soft); border-radius: var(--radius-lg); padding: clamp(24px, 3.4vw, 40px); box-shadow: var(--shadow-sm); }
.legal-lead { padding: 18px 20px; border-radius: var(--radius); background: var(--brand-soft); color: var(--ink); font-size: 14px; font-weight: 600; margin-bottom: 26px; }
.legal-layout h2 { font-size: 20px; margin: 28px 0 12px; }
.legal-layout p, .legal-layout li { font-size: 14px; color: var(--ink-soft); }
.legal-layout ul { margin: 0; padding-left: 20px; display: grid; gap: 8px; }
.legal-layout a { color: var(--brand); font-weight: 600; }

/* ===================== 支付弹窗 ===================== */
.payment-modal { width: min(880px, calc(100% - 32px)); padding: 0; border: none; border-radius: 26px; background: #fff; color: var(--ink); box-shadow: var(--shadow-lg); }
.payment-modal::backdrop { background: rgba(15, 23, 42, .52); backdrop-filter: blur(3px); }
.modal-layout { display: grid; grid-template-columns: 1fr 306px; }
.modal-copy { padding: clamp(26px, 3vw, 36px); }
.modal-copy h2 { font-size: clamp(22px, 2.6vw, 30px); margin: 14px 0 10px; }
.modal-copy > p { font-size: 14px; color: var(--ink-light); }
.modal-packages { display: grid; gap: 10px; margin-top: 20px; }
.modal-package { display: grid; grid-template-columns: auto 1fr auto; gap: 14px; align-items: center; padding: 15px 17px; border: 1px solid var(--line); border-radius: var(--radius); background: #fff; cursor: pointer; text-align: left; font: inherit; }
.modal-package.active { border-color: var(--ink); background: var(--canvas); }
.modal-package strong { display: block; font-size: 15px; }
.modal-package small { display: block; font-size: 12px; color: var(--ink-light); margin-top: 3px; }
.modal-package b { font-size: 17px; }
.checkout-panel { padding: clamp(26px, 3vw, 36px); background: var(--canvas); border-left: 1px solid var(--line-soft); text-align: center; }
.checkout-label { font-size: 12px; color: var(--ink-light); }
.checkout-price { margin: 8px 0 18px; }
.checkout-price small { font-size: 15px; color: var(--ink-light); }
.checkout-price strong { font-size: 40px; letter-spacing: -.04em; }
#payment-qr { margin: 0 auto; width: 188px; height: 188px; background: #fff; padding: 10px; border-radius: 16px; border: 1px solid var(--line); box-shadow: var(--shadow-sm); }
.pay-methods { display: flex; justify-content: center; gap: 10px; margin: 16px 0; }
.pay-methods span { font-size: 12px; padding: 6px 12px; border-radius: 999px; background: #fff; border: 1px solid var(--line); color: var(--ink-soft); }
.checkout-tip { margin-top: 12px; font-size: 12px; color: var(--ink-light); line-height: 1.5; }
.modal-close { position: absolute; top: 14px; right: 16px; width: 34px; height: 34px; border-radius: 10px; border: 1px solid var(--line); background: #fff; font-size: 20px; line-height: 1; cursor: pointer; color: var(--ink-soft); }
.modal-close:hover { color: #dc2626; border-color: #fecaca; }

/* ===================== 页脚与提示 ===================== */
.site-footer { border-top: 1px solid var(--line-soft); background: #fff; padding: clamp(38px, 4vw, 56px) 0 26px; margin-top: 10px; }
.footer-grid { display: grid; grid-template-columns: 1.2fr 1fr auto; gap: 26px; align-items: start; padding-bottom: 24px; border-bottom: 1px solid var(--line-soft); }
.brand-footer { margin-bottom: 12px; }
.site-footer p { font-size: 13px; color: var(--ink-light); }
.footer-links { display: grid; gap: 10px; font-size: 14px; }
.footer-links a:hover { color: var(--brand); }
.footer-support { font-size: 12px; color: var(--ink-light); text-align: right; }
.footer-support a { font-size: 15px; font-weight: 700; color: var(--ink); }
.disclaimer { margin-top: 18px; font-size: 12px; color: var(--ink-light); line-height: 1.7; }
.toast { position: fixed; left: 50%; bottom: 32px; transform: translate(-50%, 20px); min-width: 240px; max-width: min(460px, calc(100% - 32px)); padding: 14px 18px; border-radius: 14px; background: var(--ink); color: #fff; font-size: 14px; box-shadow: var(--shadow-lg); opacity: 0; pointer-events: none; transition: .22s ease; z-index: 90; }
.toast.show { opacity: 1; transform: translate(-50%, 0); }
.toast.error { background: #b91c1c; }
.toast.success { background: #047857; }
.notfound-body { min-height: 70vh; display: grid; place-items: center; background: var(--canvas); }
.notfound-card { background: #fff; border: 1px solid var(--line-soft); border-radius: var(--radius-lg); padding: 44px; text-align: center; box-shadow: var(--shadow); }
.notfound-card span { font-size: 46px; font-weight: 800; color: var(--brand); }
.notfound-card h1 { font-size: 24px; margin: 12px 0 8px; }
.notfound-card p { color: var(--ink-light); margin-bottom: 22px; }

/* ===================== 响应式 ===================== */
@media (max-width: 1080px) {
    .workspace-grid, .seo-grid, .legal-layout { grid-template-columns: 1fr; }
    .legal-layout aside { position: static; display: flex; flex-wrap: wrap; }
    .pricing-grid { grid-template-columns: repeat(2, 1fr); }
    .related-grid { grid-template-columns: repeat(2, 1fr); }
    .privacy-banner-grid { grid-template-columns: 1fr; }
    .shield-visual { height: 150px; }
    .privacy-banner ul { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 900px) {
    .nav-toggle { display: block; }
    .main-nav { position: absolute; top: 68px; left: 0; right: 0; flex-direction: column; gap: 2px; padding: 12px 24px 18px; background: #fff; border-bottom: 1px solid var(--line-soft); box-shadow: var(--shadow); display: none; }
    .main-nav.open { display: flex; }
    .main-nav a { padding: 12px 14px; }
    .quota-pill { margin-left: 8px; padding: 0 12px; }
    .quota-pill span:not(.quota-dot) { display: none; }
    .hero-grid { grid-template-columns: 1fr; }
    .promise-grid { grid-template-columns: repeat(2, 1fr); }
    .hero-visual { order: -1; }
    .modal-layout { grid-template-columns: 1fr; }
    .checkout-panel { border-left: none; border-top: 1px solid var(--line-soft); }
    .footer-grid { grid-template-columns: 1fr; }
    .footer-support { text-align: left; }
}
@media (max-width: 680px) {
    .shell { width: calc(100% - 32px); }
    .pricing-grid, .related-grid, .promise-grid { grid-template-columns: 1fr; }
    .price-card.featured { transform: none; }
    .form-grid { grid-template-columns: 1fr; }
    .field-row.inline-field { grid-template-columns: 1fr auto auto; }
    .segmented { grid-template-columns: 1fr; }
    .result-panel { grid-template-columns: auto 1fr; }
    .result-panel a { grid-column: 1 / -1; }
    .form-actions { flex-direction: column; align-items: stretch; }
    .process-button { width: 100%; }
    .tool-title-row { flex-direction: column; align-items: flex-start; }
    .privacy-float { left: 0; right: 0; bottom: -14px; }
    .trust-row { gap: 14px; }
    .privacy-banner ul { grid-template-columns: 1fr; }
}
@media (prefers-reduced-motion: reduce) {
    * { animation: none !important; transition: none !important; scroll-behavior: auto; }
}