:root {
    --accent: #D9531E;
    --accent-hover: #B84415;
    --accent-soft: rgba(217, 83, 30, 0.12);
    --ink: #1F1D1A;
    --ink-soft: #55504A;
    --mute: #8A8578;
    --bg: #FAF9F7;
    --surface: #FFFFFF;
    --line: #E7E3DA;
    --raised: #F3F1EC;
    --shadow-window: 0 24px 60px -18px rgba(31, 29, 26, 0.28);
    --font-serif: "Newsreader", Georgia, "Songti SC", serif;
    --font-sans: system-ui, -apple-system, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
}

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

html { scroll-behavior: smooth; }

body {
    font-family: var(--font-sans);
    color: var(--ink);
    background: var(--bg);
    line-height: 1.6;
}

/* Nav */
.nav {
    position: sticky; top: 0; z-index: 50;
    background: rgba(250, 249, 247, 0.85);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--line);
}
.nav-inner {
    max-width: 1080px; margin: 0 auto; padding: 14px 24px;
    display: flex; align-items: center; justify-content: space-between;
}
.brand { display: flex; align-items: center; gap: 10px; text-decoration: none; color: var(--ink); }
.brand-mark {
    width: 30px; height: 30px; border-radius: 8px; background: var(--accent);
    color: #fff; font-weight: 700; font-size: 16px;
    display: flex; align-items: center; justify-content: center;
}
.brand-name { font-weight: 600; font-size: 16px; letter-spacing: -0.01em; }
.nav-links { display: flex; align-items: center; gap: 22px; }
.nav-links a { text-decoration: none; color: var(--ink-soft); font-size: 14px; }
.nav-links a:hover { color: var(--accent); }
.lang-toggle {
    border: 1px solid var(--line); background: var(--surface); color: var(--ink-soft);
    border-radius: 6px; padding: 3px 10px; font-size: 12px; cursor: pointer;
}
.lang-toggle:hover { border-color: var(--accent); color: var(--accent); }

/* Hero */
.hero {
    max-width: 1080px; margin: 0 auto; padding: 72px 24px 56px;
    display: grid; grid-template-columns: 1fr 1.15fr; gap: 48px; align-items: center;
}
.hero-copy h1 {
    font-family: var(--font-serif); font-size: clamp(34px, 4.6vw, 52px);
    line-height: 1.12; font-weight: 600; letter-spacing: -0.01em;
}
.hero-copy h1 em { color: var(--accent); font-style: italic; }
.hero-sub { margin-top: 18px; font-size: 17px; color: var(--ink-soft); max-width: 42ch; }
.hero-cta { margin-top: 28px; display: flex; gap: 14px; flex-wrap: wrap; }
.btn {
    display: inline-block; text-decoration: none; font-size: 15px; font-weight: 600;
    border-radius: 10px; padding: 11px 22px; transition: all 0.15s ease;
}
.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { background: var(--accent-hover); transform: translateY(-1px); }
.btn-ghost { border: 1px solid var(--line); color: var(--ink); background: var(--surface); }
.btn-ghost:hover { border-color: var(--accent); color: var(--accent); }
.btn-ghost.disabled { opacity: 0.55; cursor: default; }
.hero-note { margin-top: 14px; font-size: 13px; color: var(--mute); }

/* Hero mockup: app window with translated comment */
.mock-window {
    background: var(--surface); border: 1px solid var(--line);
    border-radius: 14px; box-shadow: var(--shadow-window); overflow: hidden;
    font-size: 12px;
}
.mock-titlebar {
    display: flex; align-items: center; gap: 6px; padding: 9px 12px;
    background: var(--raised); border-bottom: 1px solid var(--line);
}
.mock-titlebar i { width: 10px; height: 10px; border-radius: 50%; background: var(--line); }
.mock-titlebar span { margin-left: 8px; font-size: 11px; color: var(--mute); }
.mock-body { display: flex; min-height: 280px; }
.mock-sidebar { width: 96px; border-right: 1px solid var(--line); padding: 10px 8px; display: flex; flex-direction: column; gap: 4px; }
.mock-side-item { padding: 5px 8px; border-radius: 7px; color: var(--mute); }
.mock-side-item.active { background: var(--accent-soft); color: var(--accent); font-weight: 600; }
.mock-main { flex: 1; padding: 14px; }
.mock-row { display: flex; gap: 8px; padding: 8px 6px; }
.mock-rank { color: var(--mute); }
.mock-title-zh { font-weight: 600; font-size: 13px; }
.mock-meta { font-size: 11px; color: var(--mute); margin-top: 2px; }
.mock-comment { margin: 12px 6px 0; border-left: 2px solid var(--line); padding-left: 12px; }
.mock-comment-meta { font-size: 11px; color: var(--mute); }
.mock-comment-en { margin-top: 4px; color: var(--mute); font-style: italic; font-family: var(--font-serif); }
.mock-comment-zh { margin-top: 4px; color: var(--accent); font-weight: 500; }
.mock-digest {
    margin: 14px 6px 4px; background: var(--accent-soft); border: 1px solid rgba(217, 83, 30, 0.25);
    border-radius: 10px; padding: 10px 12px;
}
.mock-digest-badge { font-size: 11px; font-weight: 600; color: var(--accent); }
.mock-digest-line { height: 6px; border-radius: 3px; background: rgba(217, 83, 30, 0.18); margin-top: 8px; }
.mock-digest-line.short { width: 62%; }

/* Sections */
.section { max-width: 1080px; margin: 0 auto; padding: 64px 24px; }
.section-alt { background: var(--surface); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.section-header { text-align: center; margin-bottom: 40px; }
.section-header h2 { font-family: var(--font-serif); font-size: clamp(26px, 3.2vw, 34px); font-weight: 600; }
.section-header p { margin-top: 10px; color: var(--ink-soft); font-size: 15px; }

/* Digest cards */
.digest-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.digest-card {
    background: var(--surface); border: 1px solid var(--line); border-radius: 14px;
    padding: 26px 22px; transition: transform 0.15s ease, box-shadow 0.15s ease;
}
.digest-card:hover { transform: translateY(-3px); box-shadow: 0 14px 34px -18px rgba(31, 29, 26, 0.25); }
.digest-card.featured { border-color: rgba(217, 83, 30, 0.4); background: linear-gradient(170deg, #fff 0%, #FDF3EC 100%); }
.digest-icon { font-size: 26px; }
.digest-card h3 { margin-top: 12px; font-size: 17px; font-weight: 600; }
.digest-card p { margin-top: 8px; font-size: 14px; color: var(--ink-soft); }

/* Pricing */
.pricing-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 380px)); gap: 20px; justify-content: center; }
.pricing-card {
    background: var(--bg); border: 1px solid var(--line); border-radius: 16px;
    padding: 30px 28px; position: relative; display: flex; flex-direction: column;
}
.pricing-card.pro { border: 1.5px solid rgba(217, 83, 30, 0.45); }
.pro-badge {
    position: absolute; top: -12px; left: 24px; background: var(--accent); color: #fff;
    font-size: 11px; font-weight: 600; border-radius: 20px; padding: 3px 12px;
}
.pricing-card h3 { font-size: 17px; font-weight: 600; }
.price { font-family: var(--font-serif); font-size: 34px; font-weight: 600; margin: 10px 0 18px; }
.pricing-card ul { list-style: none; flex: 1; margin-bottom: 24px; }
.pricing-card li {
    font-size: 14px; color: var(--ink-soft); padding: 7px 0 7px 26px; position: relative;
    border-bottom: 1px dashed var(--line);
}
.pricing-card li::before { content: "✓"; position: absolute; left: 2px; color: var(--accent); font-weight: 700; }
.pricing-card .btn { text-align: center; }

/* Download */
.dl-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.dl-card {
    text-decoration: none; background: var(--surface); border: 1px solid var(--line);
    border-radius: 14px; padding: 26px 22px; text-align: center;
    transition: transform 0.15s ease, border-color 0.15s ease;
}
.dl-card:hover { transform: translateY(-3px); border-color: var(--accent); }
.dl-os { font-size: 18px; font-weight: 600; }
.dl-os::after { content: " ↓"; color: var(--accent); }
.dl-hint { margin-top: 6px; font-size: 13px; color: var(--mute); }

/* Footer */
.footer {
    max-width: 1080px; margin: 0 auto; padding: 36px 24px 48px;
    border-top: 1px solid var(--line); text-align: center; color: var(--mute); font-size: 13px;
}
.footer a { color: var(--ink-soft); }
.footer p + p { margin-top: 6px; }

/* Responsive */
@media (max-width: 900px) {
    .hero { grid-template-columns: 1fr; padding-top: 48px; }
    .digest-grid, .dl-grid { grid-template-columns: 1fr; }
    .pricing-grid { grid-template-columns: 1fr; }
    .nav-links a:not(.lang-toggle) { display: none; }
}