/* ============================================================
           🔹 QuickQ 帮助中心 · 主视觉配色（紫青系，与首页一致）
           ============================================================ */
        :root{
            --violet:#7C3AED;
            --violet-deep:#5B21B6;
            --violet-soft:#F4EFFF;
            --cyan:#06B6D4;
            --ink:#1E1B4B;
            --ink-2:#4B4A6F;
            --line:rgba(124,58,237,.08);
            --line-strong:rgba(124,58,237,.16);
            --star:#F5A623;
        }

        *{margin:0;padding:0;box-sizing:border-box}
        body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;background:#FCFBFF;color:var(--ink);line-height:1.6;scroll-behavior:smooth}
        .container{max-width:80%;margin:0 auto;padding:0 40px}
        .navbar{background:rgba(255,255,255,.9);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:100;padding:14px 0}
        .nav-inner{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:12px;position:relative}
        .logo-area{display:flex;align-items:center;gap:8px;font-weight:700;font-size:1.6rem;color:var(--ink);text-decoration:none}
        .logo-area img{height:40px;width:auto;display:block}
        .logo-area span{color:var(--violet)}
        .nav-links{display:flex;gap:24px;align-items:center;flex-wrap:wrap}
        .nav-links a{text-decoration:none;font-weight:500;color:#3B3A5C;font-size:.92rem;transition:.2s;position:relative}
        .nav-links a::after{content:'';position:absolute;bottom:-2px;left:0;width:0;height:2px;background:linear-gradient(90deg,var(--violet),var(--cyan));transition:width .3s}
        .nav-links a:hover::after{width:100%}
        .nav-links a:hover{color:var(--violet)}
        .btn-nav{background:linear-gradient(120deg,var(--violet),#9333EA);color:#fff!important;padding:8px 24px;border-radius:40px;font-weight:600;font-size:.85rem;box-shadow:0 6px 18px rgba(124,58,237,.22);transition:all .3s}
        .btn-nav::after{display:none!important}
        .btn-nav:hover{transform:translateY(-2px);box-shadow:0 10px 26px rgba(124,58,237,.3)}
        .btn-primary{background:linear-gradient(120deg,var(--violet),#9333EA);color:#fff;border:none;padding:14px 38px;border-radius:60px;font-weight:600;font-size:1.05rem;display:inline-flex;align-items:center;gap:10px;box-shadow:0 6px 20px rgba(124,58,237,.22);transition:all .3s;cursor:pointer;text-decoration:none}
        .btn-primary:hover{transform:translateY(-3px);box-shadow:0 12px 30px rgba(124,58,237,.32)}
        .btn-outline{background:0 0;border:1.5px solid var(--line-strong);color:#3B3A5C;padding:14px 28px;border-radius:60px;font-weight:600;font-size:1.05rem;display:inline-flex;align-items:center;gap:10px;transition:.3s;text-decoration:none}
        .btn-outline:hover{border-color:var(--violet);color:var(--violet);background:rgba(124,58,237,.03)}
        .hamburger{display:none;background:0 0;border:none;font-size:1.8rem;color:var(--ink);cursor:pointer;padding:4px 8px;transition:.2s;z-index:101}
        .hamburger:hover{color:var(--violet)}
        .back-to-top{position:fixed;bottom:30px;right:30px;width:48px;height:48px;border-radius:50%;background:linear-gradient(140deg,var(--violet),#9333EA);color:#fff;border:none;font-size:1.2rem;cursor:pointer;box-shadow:0 6px 20px rgba(124,58,237,.32);transition:all .3s ease;opacity:0;visibility:hidden;z-index:999}
        .back-to-top.show{opacity:1;visibility:visible}
        .back-to-top:hover{transform:translateY(-3px);box-shadow:0 12px 28px rgba(124,58,237,.42)}
        .footer{background:#150F35;color:rgba(255,255,255,.7);padding:50px 0 30px;border-top:3px solid var(--violet)}
        .footer a{color:rgba(255,255,255,.6);text-decoration:none;transition:.2s}
        .footer a:hover{color:#fff}
        .footer .footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:36px;margin-bottom:30px}
        .footer .brand-col .logo{font-size:1.8rem;font-weight:700;color:#fff;display:flex;align-items:center;gap:10px;margin-bottom:12px}
        .footer .brand-col .logo i{color:var(--violet)}
        .footer .brand-col .logo span{color:var(--cyan)}
        .footer .brand-col p{font-size:.9rem;line-height:1.7;max-width:340px}
        .footer .col h4{color:#fff;font-size:1rem;font-weight:600;margin-bottom:14px;letter-spacing:.3px}
        .footer .col ul{list-style:none}
        .footer .col ul li{margin-bottom:8px}
        .footer .col ul li a{font-size:.9rem;color:rgba(255,255,255,.6);transition:.2s}
        .footer .col ul li a:hover{color:var(--cyan)}
        .footer .footer-bottom{border-top:1px solid rgba(255,255,255,.06);padding-top:18px;display:flex;flex-wrap:wrap;justify-content:center;align-items:center;gap:12px;font-size:.8rem}
        .footer .footer-bottom .icp{color:rgba(255,255,255,.4);text-align:center}

        /* ============================================================
           🔸 帮助中心专属模块
           ============================================================ */

        /* ----- 帮助 Hero ----- */
        .hp-hero { padding: 68px 0 56px; background: linear-gradient(140deg, #ffffff 0%, #F3EDFF 52%, #E8F8FF 100%); }
        .hp-hero-inner { display: flex; align-items: center; gap: 56px; flex-wrap: wrap; }
        .hp-hero-left { flex: 1.15; min-width: 320px; }
        .hp-hero-right { flex: 1; min-width: 300px; display: flex; justify-content: flex-end; }
        .hp-hero-badge {
            display: inline-block; background: rgba(124,58,237,0.07);
            border: 1px solid rgba(124,58,237,0.10); border-radius: 40px;
            padding: 6px 22px; font-size: 0.85rem; font-weight: 600;
            color: var(--violet); margin-bottom: 14px;
        }
        .hp-hero h1 {
            font-size: 2.9rem; font-weight: 800; line-height: 1.12;
            color: var(--ink); margin-bottom: 14px;
        }
        .hp-hero h1 .highlight {
            background: linear-gradient(100deg,var(--violet),var(--cyan));
            -webkit-background-clip: text; background-clip: text; color: transparent;
        }
        .hp-hero-desc {
            font-size: 1.06rem; color: var(--ink-2); max-width: 540px;
            margin-bottom: 22px; line-height: 1.85;
        }
        .hp-hero-desc strong { color: var(--ink); }
        .hp-hero-actions { display: flex; flex-wrap: wrap; gap: 14px; }
        .hp-hero-points {
            display: flex; gap: 12px; flex-wrap: wrap; margin-top: 18px;
        }
        .hp-hero-points span {
            display: inline-flex; align-items: center; gap: 8px;
            background: #ffffff; padding: 6px 18px; border-radius: 30px;
            font-size: 0.88rem; font-weight: 500; color: #33325A;
            border: 1px solid var(--line);
            box-shadow: 0 3px 10px rgba(124,58,237,0.04);
        }
        .hp-hero-points i { color: var(--violet); }

        /* Hero 右侧客服卡 */
        .hp-hero-support {
            background: #ffffff; border-radius: 22px; padding: 26px 28px;
            border: 1px solid var(--line);
            box-shadow: 0 20px 44px -18px rgba(124,58,237,0.18);
            width: 100%; max-width: 400px;
        }
        .hp-hero-support .hs-title {
            font-size: 0.82rem; font-weight: 700; color: var(--violet);
            letter-spacing: .6px; text-transform: uppercase; margin-bottom: 14px;
            display: flex; align-items: center; gap: 8px;
        }
        .hp-hero-support .hs-row {
            display: flex; align-items: center; gap: 14px;
            padding: 12px 0; border-bottom: 1px dashed var(--line);
        }
        .hp-hero-support .hs-row:last-child { border-bottom: none; }
        .hp-hero-support .hs-row .hs-icon {
            width: 40px; height: 40px; border-radius: 12px; flex-shrink: 0;
            background: var(--violet-soft); display: flex; align-items: center; justify-content: center;
            font-size: 1.05rem; color: var(--violet);
        }
        .hp-hero-support .hs-row .hs-body .n { font-weight: 700; color: var(--ink); font-size: 0.9rem; }
        .hp-hero-support .hs-row .hs-body .d { font-size: 0.76rem; color: #7C7AA0; }
        .hp-hero-support .hs-note {
            margin-top: 14px; padding-top: 12px; border-top: 1px solid var(--line);
            font-size: 0.78rem; color: var(--violet); line-height: 1.6;
        }

        /* ----- 通用 section header ----- */
        .section-header { text-align: center; margin-bottom: 36px; }
        .section-badge {
            display: inline-block; background: rgba(124,58,237,0.06);
            border: 1px solid var(--line); border-radius: 40px;
            padding: 4px 20px; font-size: 0.8rem; font-weight: 600;
            color: var(--violet); margin-bottom: 8px;
        }
        .section-title { font-size: 2rem; font-weight: 700; color: var(--ink); }
        .section-title i { color: var(--violet); margin-right: 8px; }
        .section-sub { color: var(--ink-2); font-size: 1rem; }

        /* ----- 快速自查清单 ----- */
        .check-section { padding: 68px 0 78px; background: #ffffff; border-top: 1px solid var(--line); }
        .check-wrap {
            background: linear-gradient(150deg,#F8F5FF,#EFFAFF);
            border-radius: 24px; border: 1px solid var(--line);
            padding: 34px 38px; display: flex; gap: 40px; flex-wrap: wrap;
        }
        .check-left { flex: 1; min-width: 280px; }
        .check-left h3 {
            font-size: 1.3rem; font-weight: 700; color: var(--ink);
            margin-bottom: 10px; display: flex; align-items: center; gap: 10px;
        }
        .check-left h3 i { color: var(--violet); }
        .check-left p { font-size: 0.92rem; color: var(--ink-2); line-height: 1.8; margin-bottom: 16px; }
        .check-left p strong { color: var(--ink); }
        .check-left .cl-tip {
            font-size: 0.82rem; color: #0891B2; background: #ffffff;
            border-left: 3px solid var(--cyan); border-radius: 10px;
            padding: 12px 16px; line-height: 1.7;
        }
        .check-right { flex: 1.2; min-width: 300px; }
        .check-list { list-style: none; padding: 0; }
        .check-list li {
            display: flex; align-items: flex-start; gap: 12px;
            background: #ffffff; border-radius: 14px; padding: 14px 18px;
            margin-bottom: 10px; border: 1px solid var(--line);
            transition: 0.3s; font-size: 0.9rem; color: var(--ink-2);
            line-height: 1.65;
        }
        .check-list li:hover {
            border-color: var(--line-strong);
            box-shadow: 0 8px 20px rgba(124,58,237,0.06);
        }
        .check-list li .ck {
            width: 22px; height: 22px; border-radius: 50%; flex-shrink: 0;
            background: linear-gradient(130deg,var(--violet),#9333EA);
            color: #fff; display: flex; align-items: center; justify-content: center;
            font-size: 0.65rem; margin-top: 1px;
        }
        .check-list li strong { color: var(--ink); }

        /* ----- 问题分类导航 ----- */
        .cat-section { padding: 68px 0 78px; background: #FAF8FF; border-top: 1px solid var(--line); }
        .cat-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
        .cat-card {
            background: #ffffff; border-radius: 20px; padding: 28px 24px 24px;
            border: 1px solid var(--line); transition: 0.3s; text-align: center;
            display: flex; flex-direction: column; position: relative; overflow: hidden;
        }
        .cat-card::before {
            content: ""; position: absolute; top: 0; left: 0; width: 100%; height: 3px;
            background: linear-gradient(90deg,var(--violet),var(--cyan));
            transform: scaleX(0); transform-origin: left; transition: transform .35s;
        }
        .cat-card:hover::before { transform: scaleX(1); }
        .cat-card:hover {
            transform: translateY(-5px); border-color: var(--line-strong);
            box-shadow: 0 18px 36px rgba(124,58,237,0.09);
        }
        .cat-card .cat-icon {
            width: 56px; height: 56px; border-radius: 16px; margin: 0 auto 14px;
            background: var(--violet-soft); display: flex; align-items: center; justify-content: center;
            font-size: 1.6rem; color: var(--violet); border: 1px solid var(--line);
        }
        .cat-card h3 { font-size: 1.05rem; font-weight: 700; color: var(--ink); margin-bottom: 6px; }
        .cat-card p { font-size: 0.84rem; color: var(--ink-2); line-height: 1.65; flex: 1; margin-bottom: 12px; }
        .cat-card .cat-count {
            font-size: 0.74rem; color: var(--violet); font-weight: 600;
            background: var(--violet-soft); border-radius: 30px;
            padding: 3px 14px; display: inline-block; align-self: center;
        }

        /* ----- 分平台排障 ----- */
        .plat-trouble-section { padding: 68px 0 78px; background: #ffffff; border-top: 1px solid var(--line); }
        .plat-trouble-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 26px; }
        .trouble-card {
            background: var(--violet-soft); border-radius: 22px; padding: 30px 28px;
            border: 1px solid var(--line); transition: 0.3s;
        }
        .trouble-card:hover {
            transform: translateY(-4px); border-color: var(--line-strong);
            box-shadow: 0 18px 36px rgba(124,58,237,0.09);
        }
        .trouble-card .tc-head {
            display: flex; align-items: center; gap: 14px; margin-bottom: 16px;
            padding-bottom: 14px; border-bottom: 1px dashed var(--line);
        }
        .trouble-card .tc-head .tc-icon {
            width: 50px; height: 50px; border-radius: 14px; flex-shrink: 0;
            background: #ffffff; display: flex; align-items: center; justify-content: center;
            font-size: 1.5rem; color: var(--violet); border: 1px solid var(--line);
        }
        .trouble-card .tc-head .tc-title { font-size: 1.1rem; font-weight: 700; color: var(--ink); }
        .trouble-card .tc-head .tc-sub { font-size: 0.76rem; color: #7C7AA0; }
        .trouble-card .tc-list { list-style: none; padding: 0; }
        .trouble-card .tc-list li {
            display: flex; align-items: flex-start; gap: 10px;
            font-size: 0.88rem; color: var(--ink-2); line-height: 1.72;
            padding: 7px 0;
        }
        .trouble-card .tc-list li .tc-num {
            width: 20px; height: 20px; border-radius: 6px; flex-shrink: 0;
            background: #ffffff; color: var(--violet); font-size: 0.7rem; font-weight: 700;
            display: flex; align-items: center; justify-content: center;
            margin-top: 3px; border: 1px solid var(--line);
        }
        .trouble-card .tc-list li strong { color: var(--ink); }

        /* ----- 连接优化 ----- */
        .opt-section { padding: 68px 0 78px; background: #FAF8FF; border-top: 1px solid var(--line); }
        .opt-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
        .opt-card {
            background: #ffffff; border-radius: 20px; padding: 30px 26px;
            border: 1px solid var(--line); transition: 0.3s;
            display: flex; flex-direction: column;
        }
        .opt-card:hover {
            transform: translateY(-4px); border-color: var(--line-strong);
            box-shadow: 0 16px 32px rgba(124,58,237,0.08);
        }
        .opt-card .o-icon {
            width: 52px; height: 52px; border-radius: 14px; margin-bottom: 16px;
            background: var(--violet-soft); display: flex; align-items: center; justify-content: center;
            font-size: 1.5rem; color: var(--violet); border: 1px solid var(--line);
        }
        .opt-card h3 { font-size: 1.08rem; font-weight: 700; color: var(--ink); margin-bottom: 8px; }
        .opt-card p { font-size: 0.9rem; color: var(--ink-2); line-height: 1.78; margin-bottom: 12px; flex: 1; }
        .opt-card p strong { color: var(--ink); }
        .opt-card .o-tip {
            font-size: 0.78rem; color: var(--violet); background: var(--violet-soft);
            border-radius: 10px; padding: 8px 12px; line-height: 1.6;
        }

        /* ----- 设备管理 ----- */
        .device-section { padding: 68px 0 78px; background: #ffffff; border-top: 1px solid var(--line); }
        .device-flex { display: flex; gap: 44px; flex-wrap: wrap; align-items: stretch; }
        .device-left { flex: 1.05; min-width: 300px; display: flex; flex-direction: column; justify-content: center; }
        .device-left h3 { font-size: 1.35rem; font-weight: 700; color: var(--ink); margin-bottom: 12px; }
        .device-left h3 i { color: var(--violet); margin-right: 8px; }
        .device-left p { font-size: 0.94rem; color: var(--ink-2); line-height: 1.85; margin-bottom: 14px; }
        .device-left p strong { color: var(--ink); }
        .device-left .dev-note {
            background: linear-gradient(120deg,#F6F1FF,#EAF9FF);
            border-left: 4px solid var(--violet); border-radius: 10px;
            padding: 14px 18px; font-size: 0.86rem; color: var(--ink-2); line-height: 1.7;
        }
        .device-left .dev-note strong { color: var(--violet); }
        .device-right { flex: 1; min-width: 300px; }
        .device-panel {
            background: var(--violet-soft); border-radius: 22px; padding: 26px 28px;
            border: 1px solid var(--line); height: 100%;
        }
        .device-panel .dp-title {
            font-size: 0.82rem; font-weight: 700; color: var(--violet);
            letter-spacing: .6px; text-transform: uppercase; margin-bottom: 16px;
            display: flex; align-items: center; gap: 8px;
        }
        .device-item {
            display: flex; align-items: center; gap: 14px;
            background: #ffffff; border-radius: 14px; padding: 14px 18px;
            border: 1px solid var(--line); margin-bottom: 10px; transition: 0.3s;
        }
        .device-item:hover { border-color: var(--line-strong); box-shadow: 0 8px 20px rgba(124,58,237,0.06); }
        .device-item .di-icon {
            width: 40px; height: 40px; border-radius: 12px; flex-shrink: 0;
            background: var(--violet-soft); display: flex; align-items: center; justify-content: center;
            font-size: 1.1rem; color: var(--violet);
        }
        .device-item .di-body { flex: 1; }
        .device-item .di-body .n { font-size: 0.9rem; font-weight: 600; color: var(--ink); }
        .device-item .di-body .s { font-size: 0.74rem; color: #7C7AA0; }
        .device-item .di-status {
            font-size: 0.72rem; font-weight: 600; color: #16A34A;
            background: rgba(34,197,94,0.09); border-radius: 30px;
            padding: 3px 12px; flex-shrink: 0;
        }

        /* ----- 联系客服 ----- */
        .contact-section { padding: 68px 0 78px; background: #FAF8FF; border-top: 1px solid var(--line); }
        .contact-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
        .contact-card {
            background: #ffffff; border-radius: 22px; padding: 32px 28px;
            border: 1px solid var(--line); transition: 0.3s; text-align: center;
            display: flex; flex-direction: column;
        }
        .contact-card:hover {
            transform: translateY(-5px); border-color: var(--line-strong);
            box-shadow: 0 18px 36px rgba(124,58,237,0.09);
        }
        .contact-card .ct-icon {
            width: 60px; height: 60px; border-radius: 18px; margin: 0 auto 16px;
            background: linear-gradient(135deg,var(--violet),#9333EA);
            display: flex; align-items: center; justify-content: center;
            font-size: 1.7rem; color: #fff;
            box-shadow: 0 10px 24px rgba(124,58,237,0.22);
        }
        .contact-card h3 { font-size: 1.1rem; font-weight: 700; color: var(--ink); margin-bottom: 8px; }
        .contact-card p { font-size: 0.89rem; color: var(--ink-2); line-height: 1.72; margin-bottom: 16px; flex: 1; }
        .contact-card .ct-btn {
            display: inline-flex; align-items: center; justify-content: center; gap: 8px;
            background: linear-gradient(120deg,var(--violet),#9333EA); color: #fff;
            padding: 12px 24px; border-radius: 40px; font-weight: 600; font-size: 0.88rem;
            text-decoration: none; transition: 0.3s; border: none; cursor: pointer;
            box-shadow: 0 6px 16px rgba(124,58,237,0.18);
        }
        .contact-card .ct-btn:hover { transform: translateY(-2px); box-shadow: 0 10px 24px rgba(124,58,237,0.28); }

        /* ----- 帮助 FAQ ----- */
        .faq-section { padding: 52px 0 72px; background: #ffffff; border-top: 1px solid var(--line); }
        .faq-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; align-items: stretch; }
        .faq-item {
            background: #FAF8FF; border-radius: 16px; padding: 24px 28px;
            border: 1px solid var(--line); transition: 0.3s;
            display: flex; flex-direction: column; height: 100%;
        }
        .faq-item:hover { border-color: var(--line-strong); box-shadow: 0 10px 24px rgba(124,58,237,0.05); }
        .faq-item .q {
            font-weight: 700; font-size: 1rem; color: var(--ink);
            display: flex; align-items: center; gap: 12px; flex-shrink: 0;
        }
        .faq-item .q i { color: var(--violet); font-size: 0.8rem; width: 20px; flex-shrink: 0; }
        .faq-item .a {
            margin-top: 10px; color: var(--ink-2); font-size: 0.92rem;
            line-height: 1.8; flex: 1;
        }
        .faq-item .a .step { display: flex; align-items: flex-start; gap: 10px; margin-top: 6px; padding-left: 4px; }
        .faq-item .a .step:first-child { margin-top: 0; }
        .faq-item .a .step-num {
            display: inline-flex; align-items: center; justify-content: center;
            min-width: 22px; height: 22px;
            background: linear-gradient(130deg,var(--violet),#9333EA);
            color: #fff; border-radius: 50%; font-size: 0.7rem; font-weight: 700;
            flex-shrink: 0; margin-top: 2px;
        }
        .faq-item .a .step-text { flex: 1; }
        .faq-item .a strong { color: var(--ink); }

        /* ----- 下载引导 CTA ----- */
        .partner-cta-wrap {
            padding: 62px 0 72px; background: #FAF8FF;
            border-top: 1px solid var(--line); border-bottom: 1px solid var(--line);
        }
        .partner-cta-box {
            background: linear-gradient(125deg, #5B21B6, #7C3AED 46%, #0891B2);
            border-radius: 28px; padding: 32px 38px;
            display: flex; flex-wrap: wrap; align-items: center;
            justify-content: space-between; gap: 18px;
            box-shadow: 0 20px 44px -10px rgba(124,58,237,0.32);
            margin: 0 auto;
        }
        .cta-info h3 { font-size: 1.3rem; font-weight: 700; color: #fff; display: flex; align-items: center; gap: 10px; }
        .cta-info p { color: rgba(255,255,255,0.82); font-size: 0.9rem; }
        .cta-keywords { display: flex; flex-wrap: wrap; gap: 8px; margin: 12px 0 10px; }
        .cta-keywords a {
            display: inline-block; background: rgba(255,255,255,0.14);
            border: 1px solid rgba(255,255,255,0.18); color: rgba(255,255,255,0.92);
            font-size: 0.75rem; font-weight: 500; padding: 3px 14px;
            border-radius: 30px; white-space: nowrap; text-decoration: none; transition: 0.25s;
        }
        .cta-keywords a:hover {
            background: rgba(255,255,255,0.26); border-color: rgba(255,255,255,0.36);
            color: #fff; transform: translateY(-1px);
        }
        .cta-contact { display: flex; gap: 18px; flex-wrap: wrap; margin-top: 6px; font-size: 0.8rem; color: rgba(255,255,255,0.72); }
        .btn-partner-apply {
            background: #fff; color: var(--violet); padding: 12px 32px;
            border-radius: 60px; font-weight: 700; font-size: 0.95rem;
            text-decoration: none; display: inline-flex; align-items: center;
            gap: 8px; transition: 0.3s; border: none; cursor: pointer;
            box-shadow: 0 6px 18px rgba(0,0,0,0.08); flex-shrink: 0;
        }
        .btn-partner-apply:hover { transform: translateY(-2px); background: #F6F1FF; }

        /* ============================================================
           📱 响应式
           ============================================================ */
        @media (max-width: 1024px) {
            .container { padding: 0 30px; }
            .hp-hero h1 { font-size: 2.5rem; }
            .hp-hero-inner { flex-direction: column; text-align: center; }
            .hp-hero-left { min-width: unset; }
            .hp-hero-right { min-width: unset; justify-content: center; width: 100%; }
            .hp-hero-desc { margin: 0 auto 22px; }
            .hp-hero-actions { justify-content: center; }
            .hp-hero-points { justify-content: center; }
            .check-wrap { flex-direction: column; gap: 26px; padding: 26px; }
            .cat-grid { grid-template-columns: 1fr 1fr; }
            .plat-trouble-grid { grid-template-columns: 1fr; }
            .opt-grid { grid-template-columns: 1fr 1fr; }
            .device-flex { flex-direction: column; gap: 26px; }
            .contact-grid { grid-template-columns: 1fr 1fr; }
            .footer .footer-grid { grid-template-columns: 1fr 1fr; }
            .partner-cta-box { flex-direction: column; text-align: center; padding: 26px; }
            .cta-keywords { justify-content: center; }
            .btn-partner-apply { width: 100%; justify-content: center; }
            .faq-grid { grid-template-columns: 1fr 1fr; }
        }
        @media (max-width: 768px) {
            .container { max-width: 100%; padding: 0 20px; }
            .nav-inner { flex-direction: row; flex-wrap: wrap; }
            .hamburger { display: block; }
            .nav-links {
                display: none; flex-direction: column; width: 100%; gap: 12px;
                padding: 16px 0 8px; border-top: 1px solid var(--line);
                margin-top: 4px; align-items: center;
            }
            .nav-links.active { display: flex; }
            .nav-links a { font-size: 1rem; }
            .btn-nav { width: 100%; text-align: center; justify-content: center; }
            .hp-hero h1 { font-size: 2.1rem; }
            .cat-grid { grid-template-columns: 1fr; }
            .opt-grid { grid-template-columns: 1fr; }
            .contact-grid { grid-template-columns: 1fr; }
            .faq-grid { grid-template-columns: 1fr; }
            .faq-item { padding: 20px; }
            .check-wrap { padding: 20px; }
            .footer .footer-grid { grid-template-columns: 1fr 1fr; gap: 28px; }
            .footer .footer-bottom { flex-direction: column; text-align: center; }
            .back-to-top { bottom: 20px; right: 20px; width: 44px; height: 44px; font-size: 1rem; }
        }
        @media (max-width: 480px) {
            .container { max-width: 100%; padding: 0 14px; }
            .hp-hero h1 { font-size: 1.8rem; }
            .hp-hero-support { padding: 20px 18px; }
            .btn-primary, .btn-outline { padding: 12px 24px; font-size: 0.9rem; }
            .device-panel { padding: 20px 18px; }
            .footer .footer-grid { grid-template-columns: 1fr; gap: 24px; text-align: center; }
            .footer .brand-col p { max-width: 100%; }
            .partner-cta-box { padding: 20px 16px; }
            .faq-item { padding: 16px; }
            .faq-item .a .step { flex-direction: column; gap: 4px; }
            .back-to-top { bottom: 16px; right: 16px; width: 40px; height: 40px; font-size: 0.9rem; }
        }