*,
        *::before,
        *::after {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        :root {
            --bg: #faf8f4;
            --bg-warm: #f3efe8;
            --ink: #1a1714;
            --ink-soft: #3d3830;
            --muted: #8a8279;
            --accent: #0055ff;
            --accent-light: #e8f0ff;
            --coral: #ff5a3c;
            --coral-light: #fff0ec;
            --mint: #00b87a;
            --mint-light: #e6f9f2;
            --amber: #f59e0b;
            --amber-light: #fef3c7;
            --violet: #7c3aed;
            --violet-light: #ede9fe;
            --line: rgba(26,23,20,.08);
            --line-dark: rgba(26,23,20,.14);
            --card: #ffffff;
            --shadow: 0 1px 3px rgba(26,23,20,.04),0 6px 24px rgba(26,23,20,.06);
            --shadow-lg: 0 4px 12px rgba(26,23,20,.04),0 20px 60px rgba(26,23,20,.1);
        }
        html {
            scroll-behavior: smooth;
            font-size: 16px;
            overflow-x: hidden;
        }
        body {
            font-family: 'DM Sans', sans-serif;
            background: var(--bg);
            color: var(--ink);
            overflow-x: hidden;
            line-height: 1.6;
        }
        ::selection {
            background: var(--accent);
            color: #fff;
        }
        a {
            text-decoration: none;
            color: inherit;
            transition: all .3s cubic-bezier(.22,1,.36,1);
        }
        ul {
            list-style: none;
        }
        .container {
            width: 100%;
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 clamp(20px,4vw,48px);
        }
        h1,
        h2,
        h3 {
            font-family: 'Instrument Serif', serif;
            font-weight: 400;
            letter-spacing: -.02em;
        }

        nav {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 999;
            backdrop-filter: blur(20px) saturate(1.6);
            -webkit-backdrop-filter: blur(20px) saturate(1.6);
            background: rgba(250,248,244,.8);
            border-bottom: 1px solid var(--line);
            transition: box-shadow .3s ease;
        }
        nav.scrolled {
            box-shadow: 0 1px 8px rgba(26,23,20,.06);
        }
        .nav-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 64px;
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-family: 'Instrument Serif', serif;
            font-size: 1.35rem;
            font-weight: 400;
            color: var(--ink);
        }
        .logo-icon {
            width: 32px;
            height: 32px;
            border-radius: 8px;
            background: linear-gradient(135deg, var(--accent), var(--violet));
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 2px 8px rgba(0,85,255,.25);
            transition: transform .3s ease;
        }
        .logo:hover .logo-icon {
            transform: rotate(-8deg) scale(1.08);
        }
        .nav-right {
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .nav-right a {
            padding: 8px 16px;
            border-radius: 8px;
            font-size: .88rem;
            font-weight: 500;
            color: var(--ink-soft);
            transition: all .2s ease;
        }
        .nav-right a:hover {
            background: rgba(26,23,20,.04);
            color: var(--ink);
        }
        .nav-right a.active {
            background: var(--accent-light);
            color: var(--accent);
        }
        .mobile-btn {
            display: none;
            background: none;
            border: none;
            color: var(--ink);
            font-size: 1.4rem;
            cursor: pointer;
        }

        .breadcrumb {
            padding: 84px 0 0;
            position: relative;
            z-index: 1;
            font-family: 'JetBrains Mono', monospace;
            font-size: .78rem;
            color: var(--muted);
        }
        .breadcrumb a {
            color: var(--muted);
        }
        .breadcrumb a:hover {
            color: var(--accent);
        }
        .breadcrumb .sep {
            margin: 0 8px;
            opacity: .4;
        }

        .hero {
            padding: clamp(20px,2vh,36px) 0 clamp(20px,2vh,36px);
            position: relative;
            z-index: 1;
            text-align: center;
        }
        .hero h1 {
            font-size: clamp(2.8rem,6vw,5rem);
            line-height: 1;
            margin-bottom: 20px;
        }
        .hero h1 em {
            font-style: italic;
            background: linear-gradient(135deg, var(--accent), var(--violet));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .hero>p {
            color: var(--muted);
            font-size: 1.05rem;
            max-width: 480px;
            margin: 0 auto 32px;
            line-height: 1.8;
        }

        .search-wrap {
            max-width: 560px;
            margin: 0 auto 40px;
            position: relative;
        }
        .search-input {
            width: 100%;
            padding: 16px 20px 16px 52px;
            border-radius: 14px;
            border: 1.5px solid var(--line-dark);
            background: var(--card);
            color: var(--ink);
            font-family: 'DM Sans', sans-serif;
            font-size: 1rem;
            outline: none;
            transition: all .3s ease;
            box-shadow: var(--shadow);
        }
        .search-input::placeholder {
            color: var(--muted);
            font-size: .92rem;
        }
        .search-input:focus {
            border-color: var(--accent);
            box-shadow: 0 0 0 3px rgba(0,85,255,.08),var(--shadow-lg);
        }
        .search-icon {
            position: absolute;
            left: 18px;
            top: 50%;
            transform: translateY(-50%);
            color: var(--muted);
            pointer-events: none;
            transition: color .3s ease;
        }
        .search-input:focus~.search-icon {
            color: var(--accent);
        }
        .search-kbd {
            position: absolute;
            right: 14px;
            top: 50%;
            transform: translateY(-50%);
            font-family: 'JetBrains Mono', monospace;
            font-size: .72rem;
            padding: 3px 8px;
            border-radius: 5px;
            background: rgba(26,23,20,.03);
            border: 1px solid var(--line);
            color: var(--muted);
            pointer-events: none;
        }

        .stats-row {
            display: flex;
            justify-content: center;
            gap: clamp(24px,4vw,56px);
            flex-wrap: wrap;
        }
        .sr-item {
            text-align: center;
        }
        .sr-num {
            font-family: 'Instrument Serif', serif;
            font-size: 1.8rem;
            line-height: 1;
        }
        .sr-item:nth-child(1) .sr-num {
            color: var(--accent);
        }
        .sr-item:nth-child(2) .sr-num {
            color: var(--coral);
        }
        .sr-item:nth-child(3) .sr-num {
            color: var(--mint);
        }
        .sr-label {
            font-family: 'JetBrains Mono', monospace;
            font-size: .72rem;
            color: var(--muted);
            margin-top: 4px;
        }

        .featured {
            padding: clamp(20px,3vh,48px) 0;
            position: relative;
            z-index: 1;
        }
        .feat-row {
            display: grid;
            grid-template-columns: 1fr 1fr 1fr;
            gap: 14px;
        }
        .feat-card {
            background: var(--card);
            border: 1px solid var(--line);
            border-radius: 16px;
            padding: 24px;
            display: flex;
            align-items: flex-start;
            gap: 14px;
            transition: all .3s ease;
            cursor: pointer;
        }
        .feat-card:hover {
            transform: translateY(-3px);
            box-shadow: var(--shadow);
        }
        .feat-num {
            width: 36px;
            height: 36px;
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-family: 'JetBrains Mono', monospace;
            font-size: .78rem;
            font-weight: 500;
            flex-shrink: 0;
        }
        .feat-num.fn1 {
            background: var(--accent-light);
            color: var(--accent);
        }
        .feat-num.fn2 {
            background: var(--coral-light);
            color: var(--coral);
        }
        .feat-num.fn3 {
            background: var(--mint-light);
            color: var(--mint);
        }
        .feat-text {
            flex: 1;
        }
        .feat-text .ft-q {
            font-weight: 600;
            font-size: .92rem;
            line-height: 1.4;
            margin-bottom: 6px;
        }
        .feat-text .ft-a {
            color: var(--muted);
            font-size: .82rem;
            line-height: 1.6;
        }
        .feat-link {
            font-family: 'JetBrains Mono', monospace;
            font-size: .72rem;
            color: var(--accent);
            margin-top: 8px;
            display: flex;
            align-items: center;
            gap: 4px;
        }

        .category-section {
            padding: clamp(40px,5vh,64px) 0;
            position: relative;
        }
        .category-section:nth-child(odd) {
            background: var(--bg-warm);
        }
        .category-section:nth-child(odd)::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 1px;
            background: var(--line);
        }
        .category-section:nth-child(odd)::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            height: 1px;
            background: var(--line);
        }

        .cat-head {
            display: flex;
            align-items: center;
            gap: 20px;
            margin-bottom: clamp(28px,3vw,44px);
            flex-wrap: wrap;
        }
        .ch-num {
            font-family: 'Instrument Serif', serif;
            font-size: clamp(3.5rem,7vw,6rem);
            line-height: .85;
            color: var(--line-dark);
        }
        .ch-info .ch-tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-family: 'JetBrains Mono', monospace;
            font-size: .72rem;
            font-weight: 500;
            letter-spacing: .08em;
            text-transform: uppercase;
            padding: 4px 12px;
            border-radius: 5px;
            margin-bottom: 8px;
        }
        .ch-tag.ct-blue {
            background: var(--accent-light);
            color: var(--accent);
        }
        .ch-tag.ct-violet {
            background: var(--violet-light);
            color: var(--violet);
        }
        .ch-tag.ct-mint {
            background: var(--mint-light);
            color: var(--mint);
        }
        .ch-tag.ct-amber {
            background: var(--amber-light);
            color: var(--amber);
        }
        .ch-tag.ct-coral {
            background: var(--coral-light);
            color: var(--coral);
        }
        .ch-tag.ct-teal {
            background: rgba(0,184,122,.08);
            color: var(--mint);
        }
        .ch-info h2 {
            font-size: clamp(1.6rem,3vw,2.2rem);
            line-height: 1.1;
        }
        .ch-count {
            margin-left: auto;
            font-family: 'JetBrains Mono', monospace;
            font-size: .82rem;
            color: var(--muted);
            padding: 6px 14px;
            border-radius: 8px;
            background: var(--card);
            border: 1px solid var(--line);
        }

        .faq-list {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 0;
        }
        .faq-list.single-col {
            grid-template-columns: 1fr;
        }

        .faq-line {
            padding: 18px 0;
            border-bottom: 1px solid var(--line);
            cursor: pointer;
            transition: background .2s ease;
        }
        .faq-line:last-child {
            border-bottom: none;
        }
        .faq-line:hover {
            background: rgba(0,85,255,.015);
        }
        .faq-line:first-child {
            border-top: 1px solid var(--line);
        }

        .fl-q {
            display: flex;
            align-items: flex-start;
            gap: 12px;
            padding: 0 20px;
        }
        .fl-mark {
            font-family: 'Instrument Serif', serif;
            font-size: 1.4rem;
            line-height: 1.3;
            flex-shrink: 0;
            width: 24px;
        }
        .faq-line.fl-accent .fl-mark {
            color: var(--accent);
        }
        .faq-line.fl-coral .fl-mark {
            color: var(--coral);
        }
        .faq-line.fl-mint .fl-mark {
            color: var(--mint);
        }
        .faq-line.fl-amber .fl-mark {
            color: var(--amber);
        }
        .faq-line.fl-violet .fl-mark {
            color: var(--violet);
        }
        .faq-line.fl-teal .fl-mark {
            color: var(--mint);
        }

        .fl-q-text {
            flex: 1;
            font-weight: 600;
            font-size: .95rem;
            line-height: 1.45;
            padding-right: 8px;
        }
        .fl-toggle {
            width: 24px;
            height: 24px;
            border-radius: 6px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: rgba(26,23,20,.02);
            border: 1px solid transparent;
            flex-shrink: 0;
            margin-top: 2px;
            transition: all .3s ease;
        }
        .faq-line:hover .fl-toggle {
            border-color: var(--line);
        }
        .faq-line.open .fl-toggle {
            background: var(--accent-light);
            border-color: rgba(0,85,255,.15);
        }
        .fl-toggle svg {
            transition: transform .3s ease;
        }
        .faq-line.open .fl-toggle svg {
            transform: rotate(180deg);
        }

        .fl-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height .35s cubic-bezier(.22,1,.36,1);
        }
        .faq-line.open .fl-answer {
            max-height: 400px;
        }
        .fl-answer-inner {
            padding: 14px 20px 4px 56px;
        }
        .fl-answer-inner p {
            color: var(--ink-soft);
            font-size: .9rem;
            line-height: 1.8;
        }
        .fl-answer-inner code {
            font-family: 'JetBrains Mono', monospace;
            font-size: .82rem;
            padding: 2px 8px;
            border-radius: 4px;
            background: var(--accent-light);
            color: var(--accent);
        }
        .fl-answer-inner a {
            color: var(--accent);
            border-bottom: 1px solid rgba(0,85,255,.2);
        }
        .fl-answer-inner a:hover {
            border-bottom-color: var(--accent);
        }
        .fl-answer-inner ul {
            margin-top: 10px;
            display: flex;
            flex-direction: column;
            gap: 6px;
        }
        .fl-answer-inner ul li {
            position: relative;
            padding-left: 16px;
            color: var(--ink-soft);
            font-size: .88rem;
            line-height: 1.7;
        }
        .fl-answer-inner ul li::before {
            content: '';
            position: absolute;
            left: 0;
            top: 9px;
            width: 4px;
            height: 4px;
            border-radius: 50%;
            background: var(--accent);
            opacity: .5;
        }
        .fl-answer-inner .tip {
            margin-top: 12px;
            padding: 10px 14px;
            border-radius: 8px;
            font-size: .82rem;
            line-height: 1.6;
            display: flex;
            align-items: flex-start;
            gap: 8px;
        }
        .fl-answer-inner .tip.tip-blue {
            background: rgba(0,85,255,.04);
            border: 1px solid rgba(0,85,255,.06);
            color: rgba(0,85,255,.7);
        }
        .fl-answer-inner .tip.tip-amber {
            background: rgba(245,158,11,.04);
            border: 1px solid rgba(245,158,11,.06);
            color: rgba(180,130,10,.8);
        }
        .fl-answer-inner .tip .tip-i {
            flex-shrink: 0;
            margin-top: 1px;
        }

        .no-results {
            display: none;
            text-align: center;
            padding: clamp(40px,5vh,60px) 20px;
            grid-column: 1/-1;
        }
        .no-results.show {
            display: block;
        }
        .no-results h3 {
            font-size: 1.3rem;
            margin-bottom: 8px;
        }
        .no-results p {
            color: var(--muted);
            font-size: .92rem;
            max-width: 360px;
            margin: 0 auto;
        }

        .contact {
            padding: clamp(60px,8vh,100px) 0;
            position: relative;
            z-index: 1;
        }
        .contact-grid {
            display: grid;
            grid-template-columns: 1fr 1fr 1fr;
            gap: 16px;
        }
        .cc {
            background: var(--card);
            border: 1px solid var(--line);
            border-radius: 20px;
            padding: clamp(24px,2.5vw,36px);
            text-align: center;
            transition: all .3s ease;
        }
        .cc:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow);
        }
        .cc-icon {
            width: 52px;
            height: 52px;
            border-radius: 14px;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 16px;
        }
        .cc-icon.ci1 {
            background: var(--accent-light);
            color: var(--accent);
        }
        .cc-icon.ci2 {
            background: var(--coral-light);
            color: var(--coral);
        }
        .cc-icon.ci3 {
            background: var(--mint-light);
            color: var(--mint);
        }
        .cc h3 {
            font-family: 'DM Sans', sans-serif;
            font-size: 1.05rem;
            font-weight: 700;
            margin-bottom: 8px;
            letter-spacing: 0;
        }
        .cc p {
            color: var(--muted);
            font-size: .88rem;
            line-height: 1.6;
            margin-bottom: 16px;
        }
        .cc-btn {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 10px 20px;
            border-radius: 8px;
            font-weight: 600;
            font-size: .85rem;
            font-family: 'DM Sans', sans-serif;
            border: none;
            cursor: pointer;
            transition: all .3s ease;
        }
        .cc-btn.ccb1 {
            background: var(--ink);
            color: #fff;
        }
        .cc-btn.ccb1:hover {
            background: var(--accent);
            box-shadow: 0 4px 16px rgba(0,85,255,.25);
        }
        .cc-btn.ccb2 {
            background: var(--coral);
            color: #fff;
        }
        .cc-btn.ccb2:hover {
            box-shadow: 0 4px 16px rgba(255,90,60,.25);
        }
        .cc-btn.ccb3 {
            background: var(--mint);
            color: #fff;
        }
        .cc-btn.ccb3:hover {
            box-shadow: 0 4px 16px rgba(0,184,122,.25);
        }

        .footer {
            border-top: 1px solid var(--line);
            padding: 60px 0 28px;
            position: relative;
            z-index: 1;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2.5fr 1fr 1fr 1fr;
            gap: clamp(24px,4vw,60px);
            margin-bottom: 48px;
        }
        .footer-brand p {
            color: var(--muted);
            font-size: .88rem;
            max-width: 280px;
            line-height: 1.7;
            margin-top: 14px;
        }
        .footer-col h4 {
            font-family: 'JetBrains Mono', monospace;
            font-size: .75rem;
            font-weight: 500;
            color: var(--ink);
            margin-bottom: 18px;
            letter-spacing: .1em;
            text-transform: uppercase;
        }
        .footer-col li {
            margin-bottom: 10px;
        }
        .footer-col a {
            color: var(--muted);
            font-size: .88rem;
            transition: all .3s ease;
        }
        .footer-col a:hover {
            color: var(--accent);
        }
        .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding-top: 24px;
            border-top: 1px solid var(--line);
            font-size: .78rem;
            color: var(--muted);
            font-family: 'JetBrains Mono', monospace;
        }

        .back-top {
            position: fixed;
            bottom: 28px;
            right: 28px;
            width: 44px;
            height: 44px;
            border-radius: 12px;
            background: var(--card);
            border: 1px solid var(--line);
            box-shadow: var(--shadow);
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            z-index: 998;
            opacity: 0;
            transform: translateY(16px);
            transition: all .3s ease;
            pointer-events: none;
        }
        .back-top.show {
            opacity: 1;
            transform: translateY(0);
            pointer-events: auto;
        }
        .back-top:hover {
            border-color: var(--accent);
            background: var(--accent-light);
        }

        .reveal {
            opacity: 0;
            transform: translateY(24px);
            transition: all .6s cubic-bezier(.22,1,.36,1);
        }
        .reveal.show {
            opacity: 1;
            transform: translateY(0);
        }
        .reveal-d1 {
            transition-delay: .1s;
        }
        .reveal-d2 {
            transition-delay: .2s;
        }

        @media(max-width:1024px) {
            .faq-list {
                grid-template-columns: 1fr;
            }
            .feat-row {
                grid-template-columns: 1fr 1fr;
            }
            .contact-grid {
                grid-template-columns: 1fr 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }
        @media(max-width:768px) {
            .nav-right a:not(.nav-right a.active) {
                display: none;
            }
            .nav-right a.active {
                display: block;
            }
            .mobile-btn {
                display: block;
            }
            .feat-row {
                grid-template-columns: 1fr;
            }
            .contact-grid {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr;
            }
            .footer-bottom {
                flex-direction: column;
                gap: 8px;
                text-align: center;
            }
            .ch-count {
                display: none;
            }
            .fl-answer-inner {
                padding-left: 20px;
            }
            .search-kbd {
                display: none;
            }
        }

        /* 新增板块样式 */
        .tool-section {
            padding: clamp(50px,7vh,90px) 0;
            border-top: 1px solid var(--line);
        }
        .tool-grid {
            display: grid;
            grid-template-columns: repeat(4,1fr);
            gap: 16px;
        }
        .tool-card {
            background: var(--card);
            border: 1px solid var(--line);
            border-radius: 20px;
            padding: 26px 20px;
            text-align: center;
            transition: all .3s ease;
        }
        .tool-card:hover {
            transform: translateY(-5px);
            box-shadow: var(--shadow-lg);
        }
        .tool-icon {
            width: 56px;
            height: 56px;
            border-radius: 16px;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 14px;
            font-size: 1.8rem;
        }
        .tool-card:nth-child(1) .tool-icon {
            background: var(--accent-light);
            color: var(--accent);
        }
        .tool-card:nth-child(2) .tool-icon {
            background: var(--coral-light);
            color: var(--coral);
        }
        .tool-card:nth-child(3) .tool-icon {
            background: var(--mint-light);
            color: var(--mint);
        }
        .tool-card:nth-child(4) .tool-icon {
            background: var(--violet-light);
            color: var(--violet);
        }
        .tool-card h3 {
            font-family: 'DM Sans', sans-serif;
            font-weight: 700;
            font-size: 1rem;
            margin-bottom: 8px;
            letter-spacing: 0;
        }
        .tool-card p {
            color: var(--muted);
            font-size: .85rem;
            line-height: 1.6;
        }

        .community-section {
            padding: clamp(50px,7vh,90px) 0;
        }
        .comm-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 16px;
        }
        .comm-card {
            background: var(--card);
            border: 1px solid var(--line);
            border-radius: 20px;
            padding: 24px;
            transition: all .3s ease;
        }
        .comm-card:hover {
            box-shadow: var(--shadow);
        }
        .comm-card .comm-quote {
            font-size: .9rem;
            line-height: 1.7;
            color: var(--ink-soft);
            font-style: italic;
            margin-bottom: 12px;
        }
        .comm-card .comm-author {
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .comm-avatar {
            width: 32px;
            height: 32px;
            border-radius: 8px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: .75rem;
            font-weight: 700;
            color: #fff;
            background: var(--accent);
        }
        .comm-author .comm-name {
            font-weight: 600;
            font-size: .85rem;
        }
        .comm-author .comm-role {
            font-size: .75rem;
            color: var(--muted);
        }

        @media(max-width:1024px) {
            .tool-grid {
                grid-template-columns: 1fr 1fr;
            }
            .comm-grid {
                grid-template-columns: 1fr;
            }
        }
        @media(max-width:768px) {
            .tool-grid {
                grid-template-columns: 1fr;
            }
        }