:root { --paper-bg: #faf7f0; --paper-card: #fffdf9; --paper-subtle: #f2ece1; --ink-main: #221f1b; --ink-body: #4a453d; --ink-muted: #7a7267; --amber-accent: #b86b14; --amber-soft: #f5e6d0; --border-line: #ded6c6; --border-strong: #bfb39e; --font-sans: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, -apple-system, sans-serif; --font-serif: "Songti SC", "STSong", "SimSun", serif; } * { margin: 0; padding: 0; box-sizing: border-box; } html { scroll-behavior: smooth; background-color: var(--paper-bg); color: var(--ink-main); } body { font-family: var(--font-sans); background-color: var(--paper-bg); color: var(--ink-main); line-height: 1.75; -webkit-font-smoothing: antialiased; } a { color: inherit; text-decoration: none; } ul, ol { list-style: none; } img { display: block; max-width: 100%; height: auto; } .paper-layout { display: grid; grid-template-columns: 290px 1fr; min-height: 100vh; max-width: 1380px; margin: 0 auto; border-left: 1px solid var(--border-line); border-right: 1px solid var(--border-line); background-color: var(--paper-bg); } .sidebar { border-right: 1px solid var(--border-line); background-color: var(--paper-subtle); } .sidebar-inner { position: sticky; top: 0; padding: 36px 28px; display: flex; flex-direction: column; gap: 28px; max-height: 100vh; overflow-y: auto; } .brand-block { display: flex; align-items: flex-start; justify-content: space-between; border-bottom: 2px solid var(--ink-main); padding-bottom: 18px; } .brand-link { display: flex; flex-direction: column; gap: 4px; } .brand-kicker { font-size: 11px; letter-spacing: 2px; color: var(--amber-accent); font-weight: 700; } .brand-name { font-family: var(--font-serif); font-size: 28px; font-weight: 900; letter-spacing: 1px; color: var(--ink-main); line-height: 1.2; } .brand-domain { font-size: 12px; color: var(--ink-muted); font-family: monospace; } .brand-summary { font-size: 13.5px; color: var(--ink-body); line-height: 1.7; } .menu-toggle { display: none; width: 40px; height: 40px; border: 1px solid var(--border-strong); background: var(--paper-card); border-radius: 4px; cursor: pointer; padding: 8px; flex-direction: column; justify-content: center; gap: 5px; } .menu-toggle-bar { display: block; width: 100%; height: 2px; background-color: var(--ink-main); } .nav-caption { font-size: 11px; font-weight: 700; letter-spacing: 1.8px; color: var(--ink-muted); margin-bottom: 12px; } .nav-list { display: flex; flex-direction: column; border-top: 1px solid var(--border-line); } .nav-item { display: flex; align-items: baseline; gap: 12px; padding: 12px 10px; border-bottom: 1px solid var(--border-line); font-size: 14.5px; font-weight: 600; color: var(--ink-body); transition: background-color 0.2s ease, color 0.2s ease, padding-left 0.2s ease; } .nav-item:hover { background-color: var(--paper-card); color: var(--amber-accent); padding-left: 14px; } .nav-item.active { background-color: var(--paper-card); color: var(--ink-main); border-left: 3px solid var(--amber-accent); padding-left: 13px; } .nav-no { font-family: monospace; font-size: 12px; color: var(--amber-accent); font-weight: 700; } .sidebar-note { margin-top: auto; padding: 16px; background-color: var(--paper-card); border: 1px solid var(--border-line); border-left: 3px solid var(--amber-accent); } .note-title { font-size: 12.5px; font-weight: 700; color: var(--ink-main); margin-bottom: 6px; } .note-desc { font-size: 12.5px; color: var(--ink-muted); line-height: 1.65; } .main-sheet { padding: 48px clamp(24px, 5vw, 72px) 64px; background-color: var(--paper-bg); } .editorial-hero { padding-bottom: 44px; border-bottom: 2px solid var(--ink-main); } .hero-meta { display: flex; flex-wrap: wrap; align-items: center; gap: 10px; font-size: 12.5px; font-weight: 700; color: var(--amber-accent); letter-spacing: 1px; margin-bottom: 16px; } .meta-sep { color: var(--border-strong); } .editorial-hero h1 { font-family: var(--font-serif); font-size: clamp(28px, 3.8vw, 44px); font-weight: 900; line-height: 1.3; color: var(--ink-main); letter-spacing: 0.5px; max-width: 860px; } .hero-lead { margin-top: 22px; font-size: 16.5px; color: var(--ink-body); line-height: 1.9; max-width: 840px; } .hero-sub { margin-top: 14px; font-size: 15px; color: var(--ink-muted); line-height: 1.85; max-width: 840px; } .hero-sub strong { color: var(--ink-main); } .hero-actions { margin-top: 28px; display: flex; flex-wrap: wrap; gap: 14px; } .btn-primary, .btn-secondary { display: inline-flex; align-items: center; justify-content: center; padding: 11px 24px; font-size: 14.5px; font-weight: 700; border-radius: 3px; transition: background-color 0.2s ease, color 0.2s ease, border-color 0.2s ease; } .btn-primary { background-color: var(--ink-main); color: var(--paper-card); border: 1px solid var(--ink-main); } .btn-primary:hover { background-color: var(--amber-accent); border-color: var(--amber-accent); } .btn-secondary { background-color: var(--paper-card); color: var(--ink-main); border: 1px solid var(--border-strong); } .btn-secondary:hover { border-color: var(--ink-main); background-color: var(--paper-subtle); } .editorial-section { padding: 52px 0; border-bottom: 1px solid var(--border-line); } .section-header { margin-bottom: 32px; max-width: 820px; } .section-index { display: inline-block; font-family: monospace; font-size: 12px; font-weight: 700; letter-spacing: 2px; color: var(--amber-accent); background-color: var(--amber-soft); padding: 3px 10px; margin-bottom: 10px; } .section-header h2 { font-family: var(--font-serif); font-size: clamp(22px, 2.8vw, 31px); font-weight: 900; color: var(--ink-main); line-height: 1.35; } .section-intro { margin-top: 12px; font-size: 15px; color: var(--ink-muted); line-height: 1.8; } .editorial-split { display: grid; grid-template-columns: 1.35fr 0.95fr; gap: 36px; align-items: start; } .numbered-rows { display: flex; flex-direction: column; border-top: 1px solid var(--border-strong); } .row-item { display: grid; grid-template-columns: 56px 1fr; gap: 18px; padding: 24px 18px; border-bottom: 1px solid var(--border-line); background-color: var(--paper-card); transition: background-color 0.2s ease; } .row-item:hover { background-color: #fffaf0; } .row-item.is-hidden { display: none; } .row-num { font-family: var(--font-serif); font-size: 24px; font-weight: 900; color: var(--amber-accent); line-height: 1.2; padding-top: 2px; } .row-head { display: flex; flex-wrap: wrap; align-items: baseline; justify-content: space-between; gap: 10px; margin-bottom: 8px; } .row-body h3 { font-size: 17.5px; font-weight: 800; color: var(--ink-main); line-height: 1.4; margin-bottom: 8px; } .row-head h3 { margin-bottom: 0; } .row-badge { font-size: 12px; color: var(--amber-accent); background-color: var(--amber-soft); padding: 2px 9px; font-weight: 600; } .row-body p { font-size: 14.5px; color: var(--ink-body); line-height: 1.85; } .concept-figure { background-color: var(--paper-card); border: 1px solid var(--border-strong); padding: 16px; } .concept-figure img { width: 100%; height: auto; background-color: var(--paper-subtle); border: 1px solid var(--border-line); } .concept-figure figcaption { margin-top: 12px; font-size: 12.5px; color: var(--ink-muted); line-height: 1.65; } .editorial-figure-banner { margin-top: 28px; } .horizontal-figure { max-width: 760px; } .filter-bar { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; margin-bottom: 20px; padding: 12px 16px; background-color: var(--paper-subtle); border: 1px solid var(--border-line); } .filter-label { font-size: 13px; font-weight: 700; color: var(--ink-body); margin-right: 4px; } .filter-btn { padding: 6px 14px; font-size: 13px; font-weight: 600; color: var(--ink-body); background-color: var(--paper-card); border: 1px solid var(--border-strong); border-radius: 2px; cursor: pointer; transition: all 0.2s ease; } .filter-btn:hover { border-color: var(--amber-accent); color: var(--amber-accent); } .filter-btn.active { background-color: var(--ink-main); color: var(--paper-card); border-color: var(--ink-main); } .faq-controls { display: flex; align-items: center; gap: 10px; margin-bottom: 14px; } .btn-text { background: none; border: none; font-size: 13px; font-weight: 700; color: var(--amber-accent); cursor: pointer; padding: 4px 2px; text-decoration: underline; } .btn-text:hover { color: var(--ink-main); } .ctrl-sep { color: var(--border-strong); font-size: 12px; } .faq-list { border-top: 1px solid var(--border-strong); } .faq-item { border-bottom: 1px solid var(--border-line); background-color: var(--paper-card); } .faq-question { font-size: 16px; } .faq-trigger { width: 100%; display: grid; grid-template-columns: 44px 1fr 28px; align-items: center; gap: 12px; padding: 20px 18px; background: none; border: none; text-align: left; cursor: pointer; font-family: inherit; color: var(--ink-main); } .faq-trigger:hover { background-color: #fffaf0; } .faq-no { font-family: monospace; font-size: 14px; font-weight: 700; color: var(--amber-accent); } .faq-title { font-size: 16px; font-weight: 800; line-height: 1.45; } .faq-icon { font-family: monospace; font-size: 18px; font-weight: 700; color: var(--amber-accent); text-align: center; } .faq-answer { padding: 0 18px 22px 74px; } .faq-answer p { font-size: 14.5px; color: var(--ink-body); line-height: 1.85; } .editorial-footer { padding-top: 44px; color: var(--ink-muted); font-size: 13.5px; } .footer-grid { display: grid; grid-template-columns: 1.5fr 1fr; gap: 32px; padding-bottom: 28px; border-bottom: 1px solid var(--border-line); } .footer-brand strong, .footer-nav strong { display: block; color: var(--ink-main); font-size: 15px; margin-bottom: 10px; } .footer-brand p { margin-bottom: 6px; line-height: 1.7; } .footer-brand a { color: var(--amber-accent); text-decoration: underline; } .footer-nav ul { display: grid; grid-template-columns: repeat(2, 1fr); gap: 8px; } .footer-nav a:hover { color: var(--amber-accent); text-decoration: underline; } .footer-legal { padding-top: 20px; font-size: 12.5px; } @media (max-width: 980px) { .paper-layout { grid-template-columns: 1fr; } .sidebar { border-right: none; border-bottom: 2px solid var(--ink-main); position: sticky; top: 0; z-index: 50; } .sidebar-inner { position: static; padding: 16px 20px; gap: 12px; max-height: none; } .brand-block { border-bottom: none; padding-bottom: 0; align-items: center; } .brand-summary, .sidebar-note { display: none; } .menu-toggle { display: flex; } .chapter-nav { display: none; padding-top: 12px; border-top: 1px solid var(--border-line); } .chapter-nav.open { display: block; } .editorial-split { grid-template-columns: 1fr; } } @media (max-width: 640px) { .main-sheet { padding: 28px 18px 48px; } .row-item { grid-template-columns: 1fr; gap: 8px; padding: 18px 14px; } .faq-trigger { grid-template-columns: 36px 1fr 24px; padding: 16px 12px; } .faq-answer { padding: 0 14px 18px 14px; } .footer-grid { grid-template-columns: 1fr; gap: 20px; } }