:root {
            --bg: #0a0812;
            --bg-alt: #0f0d14;
            --surface: rgba(25,22,38,0.6);
            --accent: #38bdf8;
            --accent2: #a78bfa;
            --pink: #f472b6;
            --coral: #fb7185;
            --text: #e8e4ef;
            --muted: #94a3b8;
            --border: rgba(167,139,250,0.1);
        }
        * { box-sizing: border-box; margin: 0; padding: 0; }
        /* 恢复鼠标指针（覆盖全局 style.css 的 cursor: none） */
        html, body { cursor: auto; }
        body { background: var(--bg); color: var(--text); font-family: 'Segoe UI', system-ui, sans-serif; min-height: 100vh; line-height: 1.6; }
        a { color: inherit; text-decoration: none; }
        a:hover { cursor: pointer; }
        button, .cta-btn { cursor: pointer; }

        .top-nav {
            position: sticky; top: 0; z-index: 100;
            background: rgba(10,8,18,0.85); backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--border);
            display: flex; align-items: center; justify-content: space-between;
            padding: 0 24px; height: 52px;
        }
        .zhizao-case-nav-left { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; }
        .nav-back { display: inline-flex; align-items: center; gap: 8px; color: var(--muted); font-size: 0.875rem; transition: color 0.2s; }
        .nav-back:hover { color: var(--pink); }
        .nav-title { font-size: 0.9rem; font-weight: 600; color: var(--text); }
        .nav-title span { color: var(--pink); }

        .hero {
            text-align: center; padding: 48px 24px 24px;
            background: radial-gradient(ellipse 80% 60% at 50% 0%, rgba(244,114,182,0.08) 0%, transparent 55%);
        }
        .hero-badge {
            display: inline-flex; align-items: center; gap: 6px;
            padding: 6px 14px; border-radius: 999px;
            font-size: 0.75rem; font-weight: 600; letter-spacing: 0.02em;
            background: linear-gradient(135deg, rgba(244,114,182,0.2), rgba(251,113,133,0.1));
            border: 1px solid rgba(244,114,182,0.35);
            color: var(--pink); margin-bottom: 20px;
        }
        .hero h1 {
            font-size: clamp(1.6rem, 5vw, 2.25rem); font-weight: 800; line-height: 1.3;
            color: #fff; max-width: 520px; margin: 0 auto 14px;
            letter-spacing: -0.02em;
        }
        .hero .tagline {
            font-size: 1rem; color: var(--muted); max-width: 400px; margin: 0 auto;
        }

        /* 顶部关键信息条（类似概述页规格条） */
        .hero-spec-strip {
            max-width: 720px;
            margin: 16px auto 0;
            padding: 10px 18px;
            border-radius: 999px;
            border: 1px solid rgba(148,163,184,0.4);
            background: radial-gradient(circle at 0 0, rgba(56,189,248,0.08), transparent 55%);
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 10px;
            font-size: 0.78rem;
            color: var(--muted);
        }
        .hero-spec-item {
            display: flex;
            flex-direction: column;
            align-items: flex-start;
            gap: 2px;
            min-width: 0;
        }
        .hero-spec-label {
            text-transform: uppercase;
            letter-spacing: 0.08em;
            font-size: 0.7rem;
            color: rgba(148,163,184,0.9);
        }
        .hero-spec-value {
            font-size: 0.85rem;
            color: #e5e7eb;
            white-space: nowrap;
        }
        @media (max-width: 640px) {
            .hero-spec-strip {
                flex-direction: column;
                align-items: flex-start;
                border-radius: 16px;
            }
            .hero-spec-item {
                align-items: flex-start;
            }
        }

        /* 视频区 - 首屏核心 */
        .video-block {
            max-width: 880px; margin: 0 auto 56px; padding: 0 24px;
        }
        .video-wrap {
            position: relative; border-radius: 20px; overflow: hidden;
            background: #000;
            box-shadow: 0 32px 64px rgba(0,0,0,0.5), 0 0 0 1px rgba(244,114,182,0.15);
        }
        .video-wrap .ratio { padding-bottom: 56.25%; }
        .video-wrap .inner {
            position: absolute; inset: 0;
            display: flex; flex-direction: column; align-items: center; justify-content: center;
            background: linear-gradient(160deg, #1a0f28 0%, #0d1117 100%);
            color: var(--muted);
        }
        .video-wrap .inner i { font-size: 3.5rem; opacity: 0.35; color: var(--pink); margin-bottom: 12px; }
        .video-wrap .inner span { font-size: 0.9rem; }
        .video-wrap video, .video-wrap iframe { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; }
        .video-wrap .inner { transition: opacity 0.3s; }
        .video-wrap .inner.hidden { opacity: 0; pointer-events: none; }
        .video-wrap .mute-btn {
            position: absolute; right: 12px; bottom: 12px; z-index: 2;
            width: 40px; height: 40px; border-radius: 50%;
            background: rgba(0,0,0,0.5); border: none;
            color: #fff; cursor: pointer; display: flex; align-items: center; justify-content: center;
            transition: background 0.2s;
        }
        .video-wrap .mute-btn:hover { background: rgba(0,0,0,0.75); }

        /* 区块通用 */
        .section { padding: 48px 24px; max-width: 720px; margin: 0 auto; }
        .section-title {
            font-size: 1.1rem; font-weight: 700; color: var(--text);
            margin-bottom: 24px; display: flex; align-items: center; gap: 10px;
        }
        .section-title i { color: var(--pink); font-size: 1rem; }

        /* 痛点 */
        .pain-grid {
            display: grid; grid-template-columns: repeat(2, 1fr); gap: 14px;
        }
        @media (max-width: 560px) { .pain-grid { grid-template-columns: 1fr; } }
        .pain-card {
            background: var(--surface); border: 1px solid var(--border);
            border-radius: 14px; padding: 20px;
            display: flex; align-items: flex-start; gap: 14px;
            transition: border-color 0.2s, transform 0.2s;
        }
        .pain-card:hover { border-color: rgba(244,114,182,0.25); transform: translateY(-2px); }
        .pain-card .icon {
            width: 40px; height: 40px; border-radius: 12px;
            background: rgba(244,114,182,0.12);
            display: flex; align-items: center; justify-content: center;
            color: var(--pink); font-size: 1rem; flex-shrink: 0;
        }
        .pain-card .text { font-size: 0.9rem; color: #c8d0e0; line-height: 1.55; }

        /* 我们不一样 - 亮点卡片 */
        .diff-section { background: var(--bg-alt); }
        .diff-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; }
        @media (max-width: 560px) { .diff-grid { grid-template-columns: 1fr; } }
        .diff-card {
            background: rgba(30,27,45,0.5); border: 1px solid var(--border);
            border-radius: 16px; padding: 24px;
            transition: all 0.25s;
        }
        .diff-card:hover {
            border-color: rgba(56,189,248,0.2);
            box-shadow: 0 12px 40px rgba(0,0,0,0.3);
        }
        .diff-card .icon-wrap {
            width: 48px; height: 48px; border-radius: 14px;
            background: linear-gradient(135deg, rgba(56,189,248,0.2), rgba(167,139,250,0.15));
            display: flex; align-items: center; justify-content: center;
            font-size: 1.35rem; color: var(--accent); margin-bottom: 14px;
        }
        .diff-card h4 { font-size: 1rem; color: #fff; margin-bottom: 6px; font-weight: 700; }
        .diff-card p { font-size: 0.85rem; color: var(--muted); line-height: 1.6; }

        /* 核心功能 - 三列 */
        .feat-row {
            display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px;
        }
        @media (max-width: 640px) { .feat-row { grid-template-columns: 1fr; } }
        .feat-item {
            text-align: center; padding: 28px 20px;
            background: var(--surface); border: 1px solid var(--border);
            border-radius: 16px;
        }
        .feat-item .ico { font-size: 2rem; color: var(--pink); margin-bottom: 12px; opacity: 0.9; }
        .feat-item h4 { font-size: 0.95rem; color: #fff; margin-bottom: 8px; font-weight: 600; }
        .feat-item p { font-size: 0.82rem; color: var(--muted); line-height: 1.5; }

        /* 为什么是指环 */
        .why-ring {
            background: linear-gradient(180deg, rgba(26,15,46,0.4) 0%, transparent 100%);
            border: 1px solid rgba(244,114,182,0.12);
            border-radius: 20px; padding: 32px 28px;
            display: flex; align-items: center; gap: 28px; flex-wrap: wrap;
        }
        @media (max-width: 560px) { .why-ring { flex-direction: column; text-align: center; } }
        .why-ring .visual {
            width: 80px; height: 80px; border-radius: 50%;
            background: linear-gradient(135deg, rgba(244,114,182,0.25), rgba(167,139,250,0.2));
            display: flex; align-items: center; justify-content: center;
            font-size: 2.2rem; color: var(--pink);
        }
        .why-ring .copy h4 { font-size: 1.05rem; color: #fff; margin-bottom: 8px; font-weight: 700; }
        .why-ring .copy p { font-size: 0.9rem; color: var(--muted); line-height: 1.65; }

        /* 一句话亮点列表 */
        .highlights { list-style: none; margin: 0; padding: 0; }
        .highlights li {
            display: flex; align-items: center; gap: 12px;
            padding: 12px 0; border-bottom: 1px solid var(--border);
            font-size: 0.9rem; color: #c8d0e0;
        }
        .highlights li:last-child { border-bottom: none; }
        .highlights li::before {
            content: ''; width: 6px; height: 6px; border-radius: 50%;
            background: var(--pink); flex-shrink: 0;
        }

        /* CTA 引流 */
        .cta-section {
            padding: 56px 24px 64px;
            background: radial-gradient(ellipse 70% 50% at 50% 100%, rgba(244,114,182,0.06) 0%, transparent 60%);
        }
        .cta-box {
            max-width: 480px; margin: 0 auto; text-align: center;
            padding: 40px 32px;
            background: var(--surface); border: 1px solid rgba(244,114,182,0.2);
            border-radius: 24px;
            box-shadow: 0 24px 48px rgba(0,0,0,0.35);
        }
        .cta-box .status {
            display: inline-flex; align-items: center; gap: 6px;
            padding: 6px 14px; border-radius: 999px;
            font-size: 0.78rem; font-weight: 600;
            background: rgba(251,191,36,0.15); color: #fbbf24;
            border: 1px solid rgba(251,191,36,0.3);
            margin-bottom: 20px;
        }
        .cta-box h3 { font-size: 1.35rem; color: #fff; margin-bottom: 10px; font-weight: 700; }
        .cta-box .desc { font-size: 0.9rem; color: var(--muted); margin-bottom: 28px; line-height: 1.6; }
        .cta-btns { display: flex; flex-direction: column; gap: 12px; }
        .cta-btn {
            display: inline-flex; align-items: center; justify-content: center; gap: 10px;
            padding: 14px 24px; border-radius: 12px; font-size: 0.95rem; font-weight: 600;
            border: none; cursor: pointer; transition: filter 0.2s, transform 0.15s;
        }
        .cta-btn:hover { filter: brightness(1.08); transform: translateY(-1px); }
        .cta-btn.primary {
            background: linear-gradient(135deg, var(--pink), var(--coral));
            color: #fff;
        }
        .cta-btn.secondary {
            background: rgba(255,255,255,0.06);
            color: var(--text);
            border: 1px solid var(--border);
        }
        .cta-note { margin-top: 20px; font-size: 0.8rem; color: var(--muted); }

        .opc-presale-progress {
            margin-bottom: 20px; padding: 14px 16px; border-radius: 12px;
            background: rgba(99,102,241,0.08); border: 1px solid rgba(99,102,241,0.22);
            text-align: left;
        }
        .opc-presale-progress-head {
            display: flex; justify-content: space-between; align-items: center;
            font-size: 0.82rem; color: #cbd5e1; margin-bottom: 8px;
        }
        .opc-presale-progress-stat strong { color: #fde68a; font-size: 1rem; }
        .opc-presale-progress-bar {
            height: 6px; border-radius: 999px; background: rgba(15,23,42,0.6); overflow: hidden;
        }
        .opc-presale-progress-fill {
            height: 100%; border-radius: inherit;
            background: linear-gradient(90deg, #6366f1, #ec4899);
            transition: width 0.35s ease;
        }
        .opc-presale-progress-note {
            margin: 8px 0 0; font-size: 0.75rem; color: #94a3b8; line-height: 1.5;
        }
        .case-opc-btn--presale {
            background: linear-gradient(135deg, #6366f1, #ec4899) !important;
            color: #fff !important; border: none !important;
        }

        .back-link {
            display: inline-flex; align-items: center; gap: 8px;
            margin: 0 24px 40px; color: var(--muted); font-size: 0.875rem;
            transition: color 0.2s;
        }
        .back-link:hover { color: var(--pink); }

        .case-opc-section { padding: 0 24px 32px; max-width: 920px; margin: 0 auto; }
        .case-opc-section .section-title {
            font-size: 1.15rem; margin-bottom: 10px; color: #fff;
            display: flex; align-items: center; gap: 10px;
        }
        .case-opc-section .section-lead {
            font-size: 0.88rem; color: var(--muted); line-height: 1.65; margin-bottom: 16px;
        }
        .case-opc-section .section-lead strong { color: var(--pink); }
        .case-opc-inner {
            padding: 16px 18px; border-radius: 14px;
            background: rgba(25,22,38,0.65); border: 1px solid rgba(244,114,182,0.22);
        }
        .case-opc-lead { font-size: 0.84rem; color: #e2e8f0; line-height: 1.65; margin-bottom: 14px; }
        .case-opc-sub { font-size: 0.78rem; color: var(--muted); margin: 14px 0 8px; text-transform: uppercase; letter-spacing: 0.06em; }
        .case-opc-inner .opc-gate-card { margin-bottom: 12px; }
        .case-opc-actions {
            display: flex; flex-wrap: wrap; gap: 10px; margin-top: 14px; align-items: center;
        }
        .case-opc-btn {
            padding: 8px 14px; border-radius: 10px; border: 1px solid rgba(244,114,182,0.35);
            background: rgba(244,114,182,0.12); color: #fbcfe8; font-size: 0.8rem; font-weight: 600; cursor: pointer;
        }
        .case-opc-btn--alt {
            border-color: rgba(56,189,248,0.35); background: rgba(56,189,248,0.1); color: #bae6fd;
        }
        .case-opc-btn:disabled { opacity: 0.65; cursor: default; }
        .case-opc-link { font-size: 0.8rem; color: var(--accent); text-decoration: underline; text-underline-offset: 2px; }