:root {
    --blue-900: #063a78;
    --blue-800: #0a4b96;
    --blue-700: #125fad;
    --blue-050: #eef6ff;
    --ink: #1b2733;
    --muted: #6f7d8c;
    --line: #dfe7ef;
    --paper: #ffffff;
    --wash: #f5f8fb;
    --gold: #d99a25;
    --green: #15876c;
    --red: #b42318;
    --shadow: 0 14px 36px rgba(12, 52, 94, .10);
}

* { box-sizing: border-box; }
body {
    margin: 0;
    color: var(--ink);
    background: var(--wash);
    font: 16px/1.65 "Noto Serif SC", "Source Han Serif SC", "Songti SC", "Microsoft YaHei", serif;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; }
input, textarea, select, button { font: inherit; }

.container { width: min(1180px, calc(100% - 32px)); margin: 0 auto; }
.site-header { background: var(--blue-800); color: #fff; box-shadow: 0 2px 16px rgba(2, 31, 69, .18); }
.topbar { width: min(1220px, calc(100% - 28px)); min-height: 76px; margin: 0 auto; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.brand { display: flex; align-items: center; gap: 14px; min-width: 260px; }
.brand-mark { width: 46px; height: 46px; display: grid; place-items: center; border: 2px solid rgba(255,255,255,.72); border-radius: 50%; font-weight: 800; background: rgba(255,255,255,.08); }
.brand strong { display: block; font-size: 22px; letter-spacing: 0; }
.brand small { display: block; margin-top: 2px; color: rgba(255,255,255,.78); font-size: 12px; }
.main-nav { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; justify-content: flex-end; }
.main-nav a, .nav-user { padding: 9px 12px; border-radius: 4px; color: rgba(255,255,255,.9); }
.main-nav a.active, .main-nav a:hover { background: rgba(255,255,255,.14); color: #fff; }
.nav-button { background: var(--gold) !important; color: #fff !important; }

.hero { color: #fff; background: linear-gradient(110deg, rgba(6,58,120,.96), rgba(12,94,165,.82)), radial-gradient(circle at 78% 15%, rgba(217,154,37,.45), transparent 28%), url('../images/hero-pattern.svg'); background-size: cover; }
.hero-inner { min-height: 360px; display: grid; align-items: center; grid-template-columns: 1.1fr .9fr; gap: 38px; padding: 54px 0; }
.hero h1 { margin: 0 0 16px; font-size: clamp(34px, 5vw, 56px); line-height: 1.15; letter-spacing: 0; }
.hero p { margin: 0 0 28px; max-width: 680px; color: rgba(255,255,255,.86); font-size: 19px; }
.hero-panel { background: rgba(255,255,255,.12); border: 1px solid rgba(255,255,255,.25); padding: 28px; backdrop-filter: blur(4px); }
.hero-stats { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; margin-top: 26px; }
.hero-stat { border-left: 3px solid var(--gold); padding-left: 12px; }
.hero-stat strong { display: block; font-size: 26px; }
.hero-stat span { color: rgba(255,255,255,.76); font-size: 13px; }

.btn { display: inline-flex; align-items: center; justify-content: center; min-height: 42px; padding: 9px 18px; border: 1px solid transparent; border-radius: 4px; cursor: pointer; background: var(--blue-800); color: #fff; }
.btn:hover { background: var(--blue-900); }
.btn.secondary { background: #fff; color: var(--blue-800); border-color: var(--line); }
.btn.gold { background: var(--gold); }
.btn.ghost { background: transparent; color: var(--blue-800); border-color: var(--blue-800); }
.btn.small { min-height: 34px; padding: 5px 12px; font-size: 14px; }

.section { padding: 34px 0; }
.section-title { display: flex; align-items: end; justify-content: space-between; gap: 16px; margin-bottom: 18px; border-bottom: 2px solid var(--line); }
.section-title h2 { margin: 0; padding-bottom: 10px; color: var(--blue-900); font-size: 26px; border-bottom: 3px solid var(--gold); }
.grid { display: grid; gap: 18px; }
.grid-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.card { background: var(--paper); border: 1px solid var(--line); box-shadow: var(--shadow); border-radius: 6px; }
.card-body { padding: 22px; }
.card h3 { margin: 0 0 10px; color: var(--blue-900); font-size: 21px; line-height: 1.35; }
.muted { color: var(--muted); }
.badge { display: inline-flex; align-items: center; padding: 3px 9px; border-radius: 2px; background: var(--blue-050); color: var(--blue-800); font-size: 13px; }
.badge.gold { background: #fff4df; color: #985d05; }
.badge.green { background: #e7f6f1; color: var(--green); }
.badge.red { background: #fff0f0; color: var(--red); }

.form-wrap { width: min(520px, calc(100% - 32px)); margin: 38px auto; }
.form-card { background: #fff; border-top: 5px solid var(--blue-800); box-shadow: var(--shadow); padding: 30px; border-radius: 6px; }
.form-card h1 { margin: 0 0 8px; color: var(--blue-900); font-size: 30px; }
.form-row { margin: 16px 0; }
.form-row label { display: block; margin-bottom: 7px; color: #304254; font-weight: 700; }
.input, .textarea, .select { width: 100%; border: 1px solid #cfd9e4; border-radius: 4px; background: #fff; padding: 10px 12px; color: var(--ink); }
.textarea { min-height: 130px; resize: vertical; }
.input:focus, .textarea:focus, .select:focus { outline: 3px solid rgba(18,95,173,.15); border-color: var(--blue-700); }
.form-actions { display: flex; gap: 12px; align-items: center; flex-wrap: wrap; margin-top: 18px; }
.alert { margin: 18px 0; padding: 12px 14px; border-radius: 4px; border: 1px solid var(--line); background: #fff; }
.alert-success { border-color: #bfe4d9; background: #f0fbf7; color: #11614f; }
.alert-error { border-color: #ffd3d3; background: #fff5f5; color: #9b1c1c; }

.dashboard { display: grid; grid-template-columns: 230px minmax(0, 1fr); gap: 22px; padding: 28px 0; }
.side-nav { background: #fff; border: 1px solid var(--line); border-radius: 6px; padding: 14px; align-self: start; }
.side-nav a { display: block; padding: 10px 12px; border-radius: 4px; color: #33485c; }
.side-nav a.active, .side-nav a:hover { background: var(--blue-050); color: var(--blue-800); }
.content-panel { min-width: 0; }
.table { width: 100%; border-collapse: collapse; background: #fff; border: 1px solid var(--line); }
.table th, .table td { padding: 12px 14px; border-bottom: 1px solid var(--line); text-align: left; vertical-align: top; }
.table th { background: #f0f5fa; color: var(--blue-900); }
.table tr:hover td { background: #fbfdff; }
.sentence-card { margin-bottom: 16px; background: #fff; border: 1px solid var(--line); border-radius: 6px; padding: 18px; }
.sentence-source { margin: 0 0 12px; padding-left: 13px; border-left: 3px solid var(--blue-800); font-size: 18px; }
.feedback-box { background: #f8fbff; border: 1px solid var(--line); padding: 12px; border-radius: 4px; margin-top: 10px; }
.qr-panel { display: grid; grid-template-columns: minmax(0, 1fr) 180px; gap: 22px; align-items: center; }
.qr-card { margin-top: 18px; }
.qr-link { margin-top: 14px; font-size: 14px; }
.qr-image-wrap { justify-self: end; padding: 10px; background: #fff; border: 1px solid var(--line); border-radius: 6px; }
.qr-image { display: block; width: 160px; height: 160px; }
.ai-card { margin-bottom: 18px; }
.ai-header { display: flex; justify-content: space-between; gap: 18px; align-items: center; }
.ai-summary-grid { display: grid; grid-template-columns: 180px minmax(0, 1fr); gap: 16px; margin-top: 16px; }
.ai-score-card { min-height: 136px; display: grid; align-content: center; justify-items: center; border: 1px solid #c9dcee; border-radius: 6px; background: linear-gradient(180deg, #f4f9ff, #ffffff); }
.ai-score-card span, .ai-score-card small { color: var(--muted); }
.ai-score-card strong { display: block; color: var(--blue-900); font-size: 44px; line-height: 1.1; }
.ai-summary-text, .ai-list-box, .ai-sentence-card { border: 1px solid var(--line); border-radius: 6px; background: #fff; padding: 16px; }
.ai-summary-text h4, .ai-list-box h4, .ai-sentence-list h4 { margin: 0 0 8px; color: var(--blue-900); }
.ai-summary-text p { margin: 0; }
.ai-list-grid { margin-top: 16px; }
.ai-list-box ul { margin: 0; padding-left: 20px; }
.ai-sentence-list { margin-top: 18px; }
.ai-sentence-card { margin-top: 12px; }
.ai-sentence-head { display: flex; justify-content: space-between; align-items: center; gap: 12px; margin-bottom: 10px; }
.mqm-error { margin-top: 10px; padding: 12px; border-left: 4px solid var(--blue-700); background: #f8fbff; border-radius: 4px; }
.mqm-error.major { border-left-color: var(--gold); background: #fffaf0; }
.mqm-error.critical { border-left-color: var(--red); background: #fff5f5; }
.mqm-error-title { display: flex; justify-content: space-between; gap: 12px; color: var(--blue-900); font-weight: 700; }
.mqm-error-title em { font-style: normal; color: var(--muted); }
.mqm-error p { margin: 8px 0 0; }
.json-details { margin-top: 16px; }
.json-details summary { cursor: pointer; color: var(--blue-800); font-weight: 700; }
.json-output { max-height: 520px; overflow: auto; margin: 14px 0 0; padding: 14px; border: 1px solid var(--line); border-radius: 4px; background: #071d34; color: #eef6ff; font: 13px/1.6 "SFMono-Regular", Consolas, monospace; white-space: pre-wrap; }
.ai-batch-card { margin-top: 18px; }
.ai-progress-wrap { margin-top: 18px; }
.ai-progress-meta { display: flex; justify-content: space-between; gap: 12px; margin-bottom: 8px; color: var(--blue-900); }
.ai-progress { height: 14px; overflow: hidden; border-radius: 999px; background: #e5edf6; }
.ai-progress div { width: 0; height: 100%; border-radius: inherit; background: linear-gradient(90deg, var(--blue-700), var(--green)); transition: width .25s ease; }
.ai-progress-stats { display: flex; gap: 16px; flex-wrap: wrap; margin-top: 10px; color: var(--muted); }
.ai-chart-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; margin-top: 20px; }
.chart-box { min-width: 0; padding: 16px; border: 1px solid var(--line); border-radius: 6px; background: #fff; }
.chart-box h4 { margin: 0 0 10px; color: var(--blue-900); }
.chart-canvas { width: 100%; height: 300px; }
.site-footer { margin-top: 34px; padding: 24px 0; background: #0b335e; color: rgba(255,255,255,.72); }

@media (max-width: 820px) {
    .topbar, .hero-inner, .dashboard { grid-template-columns: 1fr; display: grid; }
    .main-nav { justify-content: start; }
    .grid-2, .grid-3, .hero-stats, .qr-panel { grid-template-columns: 1fr; }
    .qr-image-wrap { justify-self: start; }
    .ai-header { display: block; }
    .ai-summary-grid { grid-template-columns: 1fr; }
    .ai-chart-grid { grid-template-columns: 1fr; }
    .hero-inner { min-height: auto; padding: 34px 0; }
}