*,
        *::before,
        *::after {
            margin: 0;
            padding: 0;
            box-sizing: border-box
        }
        :root {
            --bg: #0b0a06;
            --bg-alt: #12100a;
            --ink: #f5f0e6;
            --muted: #a09880;
            --primary: #d97706;
            --primary-bright: #f59e0b;
            --accent: #fbbf24;
            --accent-warm: #f97316;
            --success: #10b981;
            --warning: #f59e0b;
            --rose: #ef4444;
            --glass: rgba(255, 255, 255, .022);
            --glass-hover: rgba(255, 255, 255, .045);
            --line: rgba(255, 255, 255, .06);
            --line-bright: rgba(255, 255, 255, .11);
            --card-hover: rgba(245, 158, 11, .05);
            --radius-sm: 8px;
            --radius: 14px;
            --radius-lg: 20px;
            --ease: cubic-bezier(.22, 1, .36, 1);
            --font-display: 'Syne', sans-serif;
            --font-body: 'Space Grotesk', sans-serif;
            --font-mono: 'DM Mono', monospace;
        }
        html {
            scroll-behavior: smooth;
            font-size: 16px;
            overflow-x: hidden;
            -webkit-text-size-adjust: 100%
        }
        body {
            font-family: var(--font-body);
            background: var(--bg);
            color: var(--ink);
            overflow-x: hidden;
            line-height: 1.6;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale
        }
        ::selection {
            background: #f59e0b;
            color: #0b0a06
        }
        a {
            text-decoration: none;
            color: inherit;
            transition: all .3s var(--ease)
        }
        ul {
            list-style: none
        }
        .container {
            width: 100%;
            max-width: 1400px;
            margin: 0 auto;
            padding: 0 clamp(20px, 4vw, 60px)
        }
        h1,
        h2,
        h3,
        h4 {
            font-family: var(--font-display);
            font-weight: 800;
            letter-spacing: -.02em
        }
        body::before {
            content: '';
            position: fixed;
            inset: 0;
            z-index: 0;
            pointer-events: none;
            background:
                radial-gradient(ellipse 70% 50% at 15% 85%, rgba(245, 158, 11, .04), transparent),
                radial-gradient(ellipse 55% 45% at 85% 15%, rgba(251, 191, 36, .035), transparent),
                radial-gradient(ellipse 40% 35% at 50% 50%, rgba(249, 115, 22, .015), transparent)
        }

        /* 导航栏 */
        nav {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 999;
            backdrop-filter: blur(20px) saturate(1.4);
            -webkit-backdrop-filter: blur(20px) saturate(1.4);
            border-bottom: 1px solid var(--line);
            background: rgba(11, 10, 6, .72)
        }
        .nav-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 60px
        }
        .logo {
            font-family: var(--font-display);
            font-size: 1.35rem;
            font-weight: 800;
            letter-spacing: .05em;
            background: linear-gradient(135deg, #f59e0b, #fbbf24, #f97316);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            flex-shrink: 0
        }
        .nav-right {
            display: flex;
            align-items: center;
            gap: 26px
        }
        .nav-right a {
            font-size: .8rem;
            font-weight: 500;
            color: var(--muted);
            letter-spacing: .02em;
            white-space: nowrap
        }
        .nav-right a:hover {
            color: var(--ink)
        }
        .nav-right a.active {
            color: var(--accent)
        }
        .nav-download {
            padding: 8px 18px;
            border-radius: 6px;
            border: 1px solid rgba(245, 158, 11, .35);
            color: #f59e0b !important;
            font-weight: 600;
            font-size: .8rem;
            transition: all .3s ease;
            white-space: nowrap
        }
        .nav-download:hover {
            background: rgba(245, 158, 11, .1);
            box-shadow: 0 0 20px rgba(245, 158, 11, .14)
        }
        .mobile-btn {
            display: none;
            background: none;
            border: none;
            color: var(--ink);
            font-size: 1.4rem;
            cursor: pointer;
            padding: 4px
        }

        /* 面包屑 */
        .breadcrumb {
            position: relative;
            z-index: 1;
            padding: 84px 0 0;
            font-family: var(--font-mono);
            font-size: .78rem;
            color: var(--muted)
        }
        .breadcrumb a {
            color: var(--muted)
        }
        .breadcrumb a:hover {
            color: var(--accent)
        }
        .breadcrumb .sep {
            margin: 0 8px;
            opacity: .4
        }
        .breadcrumb .current {
            color: var(--accent)
        }

        /* FAQ Hero */
        .faq-hero {
            position: relative;
            z-index: 1;
            padding: clamp(28px, 4vh, 48px) 0 clamp(36px, 5vh, 60px);
            text-align: center
        }
        .faq-hero .overline {
            font-family: var(--font-mono);
            font-size: .75rem;
            font-weight: 400;
            color: var(--accent);
            letter-spacing: .2em;
            text-transform: uppercase;
            margin-bottom: 20px;
            display: inline-flex;
            align-items: center;
            gap: 12px
        }
        .faq-hero .overline::before,
        .faq-hero .overline::after {
            content: '';
            width: 28px;
            height: 1px;
            background: var(--accent)
        }
        .faq-hero h1 {
            font-size: clamp(2rem, 4.5vw, 3.4rem);
            line-height: 1.1;
            margin-bottom: 14px
        }
        .faq-hero h1 .grad {
            background: linear-gradient(90deg, #f59e0b, #fbbf24, #f97316);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text
        }
        .faq-hero .sub {
            color: var(--muted);
            font-size: .95rem;
            max-width: 500px;
            margin: 0 auto 32px;
            line-height: 1.7
        }
        .search-wrap {
            position: relative;
            max-width: 520px;
            margin: 0 auto 0
        }
        .search-input {
            width: 100%;
            padding: 14px 48px 14px 20px;
            border-radius: 12px;
            background: var(--glass);
            border: 1px solid var(--line);
            color: var(--ink);
            font-family: var(--font-body);
            font-size: .92rem;
            outline: none;
            transition: all .3s ease
        }
        .search-input::placeholder {
            color: var(--muted);
            opacity: .7
        }
        .search-input:focus {
            border-color: rgba(245, 158, 11, .35);
            box-shadow: 0 0 24px rgba(245, 158, 11, .08);
            background: rgba(255, 255, 255, .03)
        }
        .search-icon {
            position: absolute;
            right: 16px;
            top: 50%;
            transform: translateY(-50%);
            color: var(--muted);
            pointer-events: none;
            font-size: 1.1rem
        }

        /* 分类标签 */
        .category-tabs {
            position: sticky;
            top: 60px;
            z-index: 100;
            backdrop-filter: blur(20px) saturate(1.4);
            -webkit-backdrop-filter: blur(20px) saturate(1.4);
            background: rgba(11, 10, 6, .85);
            border-bottom: 1px solid var(--line);
            margin-bottom: clamp(36px, 4vh, 56px)
        }
        .tabs-inner {
            display: flex;
            gap: 4px;
            overflow-x: auto;
            scrollbar-width: none;
            padding: 0 4px
        }
        .tabs-inner::-webkit-scrollbar {
            display: none
        }
        .cat-btn {
            flex-shrink: 0;
            padding: 14px 22px;
            font-family: var(--font-body);
            font-size: .84rem;
            font-weight: 500;
            color: var(--muted);
            background: none;
            border: none;
            cursor: pointer;
            border-bottom: 2px solid transparent;
            transition: all .3s ease;
            white-space: nowrap;
            letter-spacing: .01em
        }
        .cat-btn:hover {
            color: var(--ink)
        }
        .cat-btn.active {
            color: #f59e0b;
            border-bottom-color: #f59e0b
        }

        /* FAQ 内容区 */
        .faq-body {
            position: relative;
            z-index: 1;
            padding-bottom: clamp(60px, 8vh, 100px)
        }
        .faq-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 12px;
            max-width: 1100px;
            margin: 0 auto
        }
        .faq-card {
            border-radius: var(--radius-lg);
            border: 1px solid var(--line);
            background: var(--glass);
            overflow: hidden;
            transition: all .3s ease
        }
        .faq-card:hover {
            border-color: rgba(245, 158, 11, .15);
            background: rgba(255, 255, 255, .02)
        }
        .faq-header {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 18px 22px;
            cursor: pointer;
            user-select: none;
            transition: background .2s ease;
            gap: 12px
        }
        .faq-header:hover {
            background: rgba(255, 255, 255, .015)
        }
        .faq-q {
            font-weight: 600;
            font-size: .92rem;
            display: flex;
            align-items: flex-start;
            gap: 10px;
            flex: 1;
            min-width: 0
        }
        .faq-q .q-icon {
            color: #f59e0b;
            font-family: var(--font-display);
            font-weight: 800;
            flex-shrink: 0;
            margin-top: 1px
        }
        .faq-toggle {
            width: 26px;
            height: 26px;
            border-radius: 7px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: rgba(255, 255, 255, .025);
            border: 1px solid var(--line);
            transition: all .3s ease;
            flex-shrink: 0
        }
        .faq-toggle svg {
            transition: transform .3s ease;
            width: 12px;
            height: 12px;
            fill: none;
            stroke: var(--muted);
            stroke-width: 2;
            stroke-linecap: round
        }
        .faq-card.open .faq-toggle svg {
            transform: rotate(180deg)
        }
        .faq-card.open .faq-toggle {
            background: rgba(245, 158, 11, .08);
            border-color: rgba(245, 158, 11, .2)
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height .45s var(--ease)
        }
        .faq-card.open .faq-answer {
            max-height: 600px
        }
        .faq-answer-inner {
            padding: 0 22px 22px;
            border-top: 1px solid var(--line);
            color: var(--muted);
            font-size: .86rem;
            line-height: 1.7
        }
        .faq-answer-inner p {
            margin-top: 16px
        }
        .faq-answer-inner ul,
        .faq-answer-inner ol {
            margin-top: 12px;
            padding-left: 0;
            display: flex;
            flex-direction: column;
            gap: 8px
        }
        .faq-answer-inner li {
            position: relative;
            padding-left: 18px;
            font-size: .84rem;
            line-height: 1.6
        }
        .faq-answer-inner li::before {
            content: '';
            position: absolute;
            left: 0;
            top: 9px;
            width: 4px;
            height: 4px;
            border-radius: 50%;
            background: #f59e0b;
            opacity: .5
        }
        .faq-answer-inner code {
            font-family: var(--font-mono);
            font-size: .8rem;
            padding: 2px 7px;
            border-radius: 4px;
            background: rgba(245, 158, 11, .06);
            border: 1px solid rgba(245, 158, 11, .1);
            color: #f59e0b
        }

        /* 快速诊断工具条 */
        .quick-tools {
            position: relative;
            z-index: 1;
            padding: clamp(40px, 5vh, 64px) 0
        }
        .tools-inner {
            display: flex;
            gap: 12px;
            flex-wrap: wrap;
            justify-content: center
        }
        .tool-chip {
            display: flex;
            align-items: center;
            gap: 8px;
            padding: 12px 22px;
            border-radius: 40px;
            border: 1px solid var(--line);
            background: var(--glass);
            font-size: .84rem;
            color: var(--muted);
            transition: all .3s ease;
            cursor: pointer;
            white-space: nowrap
        }
        .tool-chip:hover {
            border-color: rgba(245, 158, 11, .25);
            color: #f59e0b;
            background: rgba(245, 158, 11, .04)
        }
        .tool-chip .tool-emoji {
            font-size: 1.1rem
        }

        /* CTA */
        .cta-banner {
            position: relative;
            z-index: 1;
            padding: clamp(50px, 7vh, 80px) 0
        }
        .cta-banner-inner {
            border-radius: var(--radius-xl);
            border: 1px solid var(--line);
            background: var(--glass);
            padding: clamp(36px, 5vw, 60px);
            text-align: center;
            position: relative;
            overflow: hidden
        }
        .cta-banner-inner::before {
            content: '';
            position: absolute;
            top: -100px;
            left: -100px;
            width: 300px;
            height: 300px;
            background: radial-gradient(circle, rgba(245, 158, 11, .06), transparent 60%);
            pointer-events: none
        }
        .cta-banner-inner h3 {
            font-size: clamp(1.4rem, 2.5vw, 1.9rem);
            margin-bottom: 10px
        }
        .cta-banner-inner p {
            color: var(--muted);
            font-size: .92rem;
            margin-bottom: 24px;
            max-width: 420px;
            margin-left: auto;
            margin-right: auto
        }
        .cta-btns {
            display: flex;
            gap: 12px;
            justify-content: center;
            flex-wrap: wrap
        }
        .btn-glow {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 12px 28px;
            border-radius: 8px;
            background: #d97706;
            color: #fff;
            font-weight: 700;
            font-size: .9rem;
            font-family: var(--font-body);
            border: none;
            cursor: pointer;
            transition: all .3s ease
        }
        .btn-glow:hover {
            background: #f59e0b;
            transform: translateY(-2px);
            box-shadow: 0 8px 28px rgba(245, 158, 11, .28)
        }
        .btn-ghost {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 12px 28px;
            border-radius: 8px;
            background: transparent;
            border: 1px solid var(--line-bright);
            color: var(--ink);
            font-weight: 600;
            font-size: .9rem;
            font-family: var(--font-body);
            cursor: pointer;
            transition: all .3s ease
        }
        .btn-ghost:hover {
            border-color: rgba(255, 255, 255, .15);
            background: var(--glass-hover);
            transform: translateY(-2px)
        }

        /* 页脚 */
        .footer {
            position: relative;
            z-index: 1;
            border-top: 1px solid var(--line);
            padding: 50px 0 24px
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2.5fr 1fr 1fr 1fr;
            gap: clamp(20px, 3.5vw, 48px);
            margin-bottom: 36px
        }
        .footer-brand p {
            color: var(--muted);
            font-size: .84rem;
            max-width: 260px;
            line-height: 1.7;
            margin-top: 12px
        }
        .footer-col h4 {
            font-family: var(--font-mono);
            font-size: .72rem;
            font-weight: 500;
            color: var(--ink);
            margin-bottom: 16px;
            letter-spacing: .1em;
            text-transform: uppercase
        }
        .footer-col li {
            margin-bottom: 9px
        }
        .footer-col a {
            color: var(--muted);
            font-size: .84rem;
            transition: all .3s var(--ease)
        }
        .footer-col a:hover {
            color: #f59e0b;
            padding-left: 3px
        }
        .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding-top: 20px;
            border-top: 1px solid rgba(255, 255, 255, .04);
            font-size: .74rem;
            color: var(--muted);
            font-family: var(--font-mono)
        }

        .reveal {
            opacity: 0;
            transform: translateY(28px);
            transition: all .7s var(--ease)
        }
        .reveal.show {
            opacity: 1;
            transform: translateY(0)
        }
        .reveal-d1 {
            transition-delay: .1s
        }
        .reveal-d2 {
            transition-delay: .2s
        }

        @media(max-width:1024px) {
            .faq-grid {
                grid-template-columns: 1fr;
                max-width: 700px
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr
            }
        }
        @media(max-width:768px) {
            .nav-right a:not(.nav-download) {
                display: none
            }
            .mobile-btn {
                display: block
            }
            .footer-grid {
                grid-template-columns: 1fr
            }
            .footer-bottom {
                flex-direction: column;
                gap: 6px;
                text-align: center
            }
            .faq-header {
                padding: 15px 18px
            }
            .faq-answer-inner {
                padding: 0 18px 18px
            }
            .cat-btn {
                padding: 12px 16px;
                font-size: .78rem
            }
            .search-input {
                padding: 12px 40px 12px 16px;
                font-size: .84rem
            }
        }