/* ==========================================================================
   薯条云 (cnix.lol) — 视觉系统
   暖色调（薯条/番茄酱配色），浅色背景，专业克制，不走卡通风。
   ========================================================================== */

:root {
    --primary: #d97a1f;
    --primary-dark: #b6620f;
    --primary-light: #f4b860;
    --ink: #3b2c1e;
    --ink-soft: #6f5b47;
    --ink-faint: #9c876f;
    --bg: #fdf8f0;
    --bg-alt: #fbecd4;
    --card: #ffffff;
    --card-alt: #fff6e8;
    --border: #ecdcbd;
    --border-strong: #dcc79b;
    --accent-red: #c1440e;
    --accent-red-bg: #fbe6db;
    --success: #2f7d4f;
    --success-bg: #e7f4ec;
    --shadow-sm: 0 2px 10px rgba(59, 44, 30, 0.06);
    --shadow-md: 0 12px 32px rgba(59, 44, 30, 0.10);
    --radius: 14px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
    font-family: "PingFang SC", "Microsoft YaHei", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    background: var(--bg);
    color: var(--ink);
    line-height: 1.75;
    overflow-x: hidden;
}

a { text-decoration: none; color: inherit; }
ul, ol { list-style: none; }
img { max-width: 100%; display: block; }

/* ---------- Navbar ---------- */
.navbar {
    position: fixed;
    top: 0; left: 0; right: 0;
    min-height: 68px;
    background: rgba(253, 248, 240, 0.92);
    backdrop-filter: blur(10px);
    z-index: 1000;
    border-bottom: 1px solid var(--border);
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 5%;
    flex-wrap: wrap;
    row-gap: 10px;
}
.nav-brand {
    font-size: 21px;
    font-weight: 800;
    color: var(--ink);
    display: flex;
    align-items: center;
    gap: 8px;
    letter-spacing: -0.3px;
    white-space: nowrap;
    flex-shrink: 0;
}
.nav-brand .brand-icon {
    font-size: 22px;
    line-height: 1;
}
.nav-brand .brand-sub {
    font-size: 12px;
    font-weight: 500;
    color: var(--ink-faint);
    margin-left: 4px;
}
.nav-menu-wrapper { display: flex; align-items: center; gap: 26px; }
.nav-links { display: flex; gap: 24px; flex-wrap: wrap; }
.nav-links a { font-weight: 500; font-size: 14.5px; color: var(--ink-soft); transition: color 0.25s; }
.nav-links a:hover { color: var(--primary-dark); }
.nav-actions { display: flex; gap: 12px; align-items: center; }
.menu-toggle { display: none; font-size: 24px; cursor: pointer; color: var(--ink); background: none; border: none; }

.btn {
    display: inline-block;
    padding: 11px 24px;
    border-radius: 10px;
    font-weight: 700;
    font-size: 14.5px;
    text-align: center;
    transition: all 0.25s;
    cursor: pointer;
    border: 2px solid transparent;
}
.btn-primary { background: var(--primary); color: #fff; box-shadow: 0 6px 18px rgba(217, 122, 31, 0.32); }
.btn-primary:hover { background: var(--primary-dark); transform: translateY(-2px); box-shadow: 0 10px 24px rgba(217, 122, 31, 0.4); }
.btn-outline { border-color: var(--border-strong); color: var(--ink); background: transparent; }
.btn-outline:hover { border-color: var(--primary); color: var(--primary-dark); }
.btn-secondary { background: var(--card-alt); border-color: var(--border-strong); color: var(--ink); }
.btn-secondary:hover { border-color: var(--primary); }

/* ---------- Sections ---------- */
section, main.subpage-content { padding: 90px 5%; max-width: 1180px; margin: 0 auto; }
.section-title { text-align: center; font-size: 32px; margin-bottom: 16px; letter-spacing: -0.3px; }
.section-subtitle { text-align: center; color: var(--ink-soft); margin-bottom: 52px; font-size: 16.5px; max-width: 620px; margin-left: auto; margin-right: auto; }

/* ---------- Hero ---------- */
.hero {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 150px 5% 100px;
    position: relative;
    background:
        radial-gradient(ellipse 70% 55% at 15% 0%, rgba(244, 184, 96, 0.35) 0%, transparent 65%),
        radial-gradient(ellipse 60% 50% at 90% 10%, rgba(193, 68, 14, 0.12) 0%, transparent 60%),
        var(--bg);
    border-bottom: 1px solid var(--border);
}
.promo-tag {
    background: var(--accent-red-bg);
    color: var(--accent-red);
    padding: 7px 18px;
    border-radius: 20px;
    font-size: 13.5px;
    font-weight: 700;
    margin-bottom: 26px;
    border: 1px solid rgba(193, 68, 14, 0.25);
    display: inline-block;
}
.hero h1 { font-size: 44px; margin-bottom: 22px; line-height: 1.35; letter-spacing: -0.5px; max-width: 820px; }
.hero p { font-size: 17.5px; color: var(--ink-soft); max-width: 700px; margin-bottom: 36px; }
.hero-btns { display: flex; gap: 16px; flex-wrap: wrap; justify-content: center; }
.hero-notes {
    display: flex; justify-content: center; gap: 14px; margin-top: 34px; flex-wrap: wrap;
}
.hero-notes span {
    background: var(--card);
    border: 1px solid var(--border);
    padding: 8px 16px;
    border-radius: 8px;
    font-size: 13.5px;
    color: var(--ink-soft);
}
.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;
}

/* ---------- Cards / grid ---------- */
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 26px; }
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 26px; }
.card {
    background: var(--card);
    padding: 34px 28px;
    border-radius: var(--radius);
    border: 1px solid var(--border);
    transition: transform 0.25s, box-shadow 0.25s;
    text-align: left;
    box-shadow: var(--shadow-sm);
}
.card:hover { transform: translateY(-6px); box-shadow: var(--shadow-md); }
.card-icon { font-size: 32px; margin-bottom: 16px; display: inline-block; }
.card h3 { font-size: 20px; margin-bottom: 12px; }
.card p { color: var(--ink-soft); font-size: 15px; }

/* ---------- Fact / honesty boxes ---------- */
.fact-box {
    background: var(--card-alt);
    border: 1px dashed var(--border-strong);
    border-radius: 12px;
    padding: 20px 24px;
    margin: 22px 0;
    font-size: 15px;
    color: var(--ink-soft);
}
.fact-box strong { color: var(--ink); }
.note-box {
    background: var(--success-bg);
    border-left: 4px solid var(--success);
    border-radius: 8px;
    padding: 16px 20px;
    margin: 22px 0;
    font-size: 14.5px;
    color: #234f36;
}
.warn-box {
    background: var(--accent-red-bg);
    border-left: 4px solid var(--accent-red);
    border-radius: 8px;
    padding: 16px 20px;
    margin: 22px 0;
    font-size: 14.5px;
    color: #7a2c0a;
}
.tag-unverified {
    display: inline-block;
    font-size: 12px;
    color: var(--ink-faint);
    background: var(--bg-alt);
    border: 1px solid var(--border);
    padding: 2px 9px;
    border-radius: 6px;
    margin-left: 6px;
}

/* ---------- Pricing ---------- */
.pricing-attrib {
    text-align: center;
    color: var(--ink-soft);
    font-size: 14.5px;
    margin-bottom: 44px;
    background: var(--card-alt);
    border: 1px solid var(--border);
    display: inline-block;
    padding: 10px 20px;
    border-radius: 10px;
}
.pricing-attrib-wrap { text-align: center; }
.pricing-card { display: flex; flex-direction: column; text-align: center; position: relative; }
.pricing-card.highlight { border-color: var(--primary); box-shadow: 0 0 0 2px rgba(217,122,31,0.15), var(--shadow-md); }
.highlight-tag {
    position: absolute; top: -14px; left: 50%; transform: translateX(-50%);
    background: var(--primary); color: #fff; padding: 4px 16px; border-radius: 12px;
    font-weight: 700; font-size: 13px; white-space: nowrap;
}
.price { font-size: 40px; font-weight: 800; margin: 16px 0; color: var(--primary-dark); }
.price del { font-size: 20px; color: var(--ink-faint); font-weight: 400; margin-right: 6px; }
.price span { font-size: 16px; color: var(--ink-soft); font-weight: 400; }
.pricing-features { margin: 22px 0; text-align: left; flex-grow: 1; font-size: 14px; }
.pricing-features li { margin-bottom: 12px; display: flex; align-items: flex-start; gap: 8px; color: var(--ink-soft); }
.pricing-features li::before { content: '✓'; color: var(--primary); font-weight: bold; }
.pricing-card .btn { width: 100%; margin-top: 18px; }
.pricing-group-title { text-align: center; margin: 0 0 26px; color: var(--primary-dark); font-size: 20px; }

/* ---------- Table ---------- */
.table-wrap { overflow-x: auto; margin: 24px 0; }
table.data-table { width: 100%; border-collapse: collapse; font-size: 14.5px; background: var(--card); border-radius: 10px; overflow: hidden; }
table.data-table th, table.data-table td { padding: 13px 16px; border-bottom: 1px solid var(--border); text-align: left; }
table.data-table th { background: var(--bg-alt); color: var(--ink); font-weight: 700; }
table.data-table tr:last-child td { border-bottom: none; }
table.data-table tr.row-highlight { background: var(--card-alt); }

/* ---------- Feature rows ---------- */
.feature-row { display: flex; align-items: center; gap: 54px; margin-bottom: 84px; }
.feature-row:nth-child(even) { flex-direction: row-reverse; }
.feature-text { flex: 1; }
.feature-text h2 { font-size: 27px; margin-bottom: 16px; }
.feature-text p { color: var(--ink-soft); font-size: 16px; margin-bottom: 10px; }
.feature-visual {
    flex: 1; background: var(--card); border-radius: var(--radius);
    border: 1px solid var(--border); padding: 26px; box-shadow: var(--shadow-sm); width: 100%;
}
.checklist { list-style: none; }
.checklist li { padding-left: 26px; position: relative; margin-bottom: 12px; color: var(--ink-soft); font-size: 15px; }
.checklist li::before { content: '🍟'; position: absolute; left: 0; top: 0; font-size: 13px; }

/* ---------- FAQ ---------- */
.faq-list { max-width: 780px; margin: 0 auto; display: flex; flex-direction: column; gap: 14px; }
details {
    background: var(--card); border: 1px solid var(--border); border-radius: 10px; transition: border-color 0.25s;
}
details[open] { border-color: var(--primary); }
summary {
    padding: 18px 20px; font-size: 16.5px; font-weight: 700; cursor: pointer; outline: none;
    list-style: none; display: flex; justify-content: space-between; align-items: center; gap: 12px;
}
summary::-webkit-details-marker { display: none; }
summary::after { content: '+'; font-size: 22px; color: var(--primary); transition: transform 0.25s; line-height: 1; flex-shrink: 0; }
details[open] summary::after { transform: rotate(45deg); }
details p, details .faq-a { padding: 0 20px 20px; color: var(--ink-soft); margin: 0; line-height: 1.75; font-size: 15px; }

/* ---------- Scenario / who-uses cards reuse .card ---------- */

/* ---------- Bottom CTA ---------- */
.bottom-cta {
    text-align: center; padding: 100px 5%;
    background: linear-gradient(180deg, var(--bg-alt) 0%, var(--bg) 100%);
    border-top: 1px solid var(--border);
}
.bottom-cta h2 { font-size: 34px; margin-bottom: 18px; }
.bottom-cta p { color: var(--ink-soft); margin-bottom: 32px; font-size: 17px; max-width: 560px; margin-inline: auto; }
.bottom-cta .btn { font-size: 17px; padding: 15px 40px; border-radius: 30px; }
.bottom-cta .cta-fine { margin-top: 16px; font-size: 12.5px; color: var(--ink-faint); max-width: 520px; }

/* ---------- Breadcrumb ---------- */
.breadcrumb {
    max-width: 1180px; margin: 0 auto; padding: 96px 5% 0;
    font-size: 13.5px; color: var(--ink-faint);
}
.breadcrumb a { color: var(--ink-soft); }
.breadcrumb a:hover { color: var(--primary-dark); }

/* ---------- Footer ---------- */
footer { border-top: 1px solid var(--border); padding: 56px 5% 32px; background: var(--card-alt); }
.footer-inner { max-width: 1180px; margin: 0 auto; }
.footer-logo { font-size: 20px; font-weight: 800; color: var(--ink); margin-bottom: 8px; text-align: center; }
.footer-tagline { text-align: center; color: var(--ink-faint); font-size: 13.5px; margin-bottom: 34px; }
.footer-links { display: flex; justify-content: center; gap: 30px; margin-bottom: 26px; flex-wrap: wrap; }
.footer-links a { color: var(--ink-soft); font-size: 14.5px; transition: color 0.25s; }
.footer-links a:hover { color: var(--primary-dark); }
.footer-friends { text-align: center; margin-bottom: 26px; font-size: 13.5px; color: var(--ink-faint); line-height: 2.1; }
.footer-friends span.label { opacity: 0.85; margin-right: 6px; }
.footer-friends a { color: var(--ink-soft); margin: 0 9px; }
.footer-friends a:hover { color: var(--primary-dark); }
.footer-disclosure {
    max-width: 760px; margin: 0 auto 20px; text-align: center; font-size: 12.5px; color: var(--ink-faint); line-height: 1.8;
}
.footer-copy { text-align: center; color: var(--ink-faint); font-size: 13px; }

/* ---------- Subpage ---------- */
.subpage-header {
    padding: 150px 5% 56px; text-align: center;
    background: linear-gradient(180deg, var(--bg-alt) 0%, var(--bg) 100%);
    border-bottom: 1px solid var(--border);
}
.subpage-header h1 { font-size: 32px; margin-bottom: 14px; letter-spacing: -0.3px; }
.subpage-header p { color: var(--ink-soft); font-size: 16px; max-width: 640px; margin: 0 auto; }
.subpage-content { max-width: 820px; margin: 0 auto; color: var(--ink-soft); font-size: 15.5px; }
.subpage-content h2 { color: var(--ink); margin: 42px 0 18px; font-size: 23px; }
.subpage-content h3 { color: var(--ink); margin: 28px 0 12px; font-size: 18px; }
.subpage-content p { margin-bottom: 18px; }
.subpage-content ul, .subpage-content ol { padding-left: 22px; margin-bottom: 18px; }
.subpage-content ul { list-style: disc; }
.subpage-content ol { list-style: decimal; }
.subpage-content li { margin-bottom: 9px; }
.subpage-content a { color: var(--primary-dark); text-decoration: underline; text-underline-offset: 2px; }
.subpage-content strong { color: var(--ink); }
.toc {
    background: var(--card); border: 1px solid var(--border); border-radius: 12px;
    padding: 20px 24px; margin: 28px 0 36px; font-size: 14.5px;
}
.toc h2 { margin: 0 0 12px; font-size: 16px; }
.toc ol { margin-bottom: 0; padding-left: 20px; }
.toc li { margin-bottom: 6px; }
.meta-line { color: var(--ink-faint); font-size: 13.5px; margin-bottom: 8px; }
.related-box {
    background: var(--card); border: 1px solid var(--border); border-radius: 12px;
    padding: 24px 26px; margin-top: 40px;
}
.related-box h3 { margin-bottom: 12px; font-size: 17px; color: var(--ink); }
.related-box ul { list-style: none; padding-left: 0; }
.related-box li { margin-bottom: 8px; }
.related-box a { text-decoration: none; }
.related-box a:hover { text-decoration: underline; }

/* ---------- 404 ---------- */
.error-page {
    min-height: 70vh; display: flex; flex-direction: column; align-items: center; justify-content: center;
    text-align: center; padding: 160px 5% 100px;
}
.error-page .code { font-size: 90px; font-weight: 800; color: var(--primary); margin-bottom: 10px; }

/* ---------- Mobile ---------- */
@media (max-width: 860px) {
    .grid-3, .grid-2 { grid-template-columns: 1fr; }
    .feature-row, .feature-row:nth-child(even) { flex-direction: column; gap: 30px; }
    .feature-text { text-align: left; }
}

@media (max-width: 768px) {
    .nav-menu-wrapper {
        display: none; flex-direction: column; align-items: flex-start; position: absolute;
        top: 68px; left: 0; width: 100%; background: var(--bg); padding: 24px 6%;
        border-bottom: 1px solid var(--border); gap: 18px;
    }
    .nav-menu-wrapper.active { display: flex; }
    .menu-toggle { display: block; }
    .nav-links { flex-direction: column; gap: 16px; width: 100%; }
    .nav-actions { flex-direction: column; width: 100%; gap: 12px; }
    .nav-actions .btn { width: 100%; }

    .hero { padding: 120px 6% 70px; }
    .hero h1 { font-size: 30px; }
    .hero p { font-size: 15.5px; }
    .hero-btns { flex-direction: column; width: 100%; }
    .hero-btns .btn { width: 100%; }

    section, main.subpage-content { padding: 56px 6%; }
    .breadcrumb { padding: 118px 6% 0; }
    .subpage-header { padding: 150px 6% 44px; }
    .nav-actions .btn { padding: 9px 15px; font-size: 13px; }
    .nav-brand { font-size: 18px; }

    .section-title { font-size: 26px; }
    .bottom-cta h2 { font-size: 26px; }
    .footer-friends { line-height: 2.4; }
}