* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    font-family: 'DM Sans', 'Noto Sans SC', -apple-system, BlinkMacSystemFont, sans-serif;
    color: #2d3748;
    background: #f7f6f3;
    line-height: 1.7;
    font-size: 15px;
}
.container { max-width: 1200px; margin: 0 auto; padding: 0 32px; }
img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; transition: color 0.2s; }
ul { list-style: none; }

/* Colors */
:root {
    --primary: #6b7c6b;
    --primary-dark: #556655;
    --bg: #f7f6f3;
    --card: #ffffff;
    --text: #2d3748;
    --text-light: #718096;
    --border: #e2e0da;
}

/* Header */
.site-header {
    position: fixed; top: 0; left: 0; right: 0; z-index: 100;
    background: rgba(247,246,243,0.92);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border);
}
.main-nav {
    display: flex; align-items: center; justify-content: space-between;
    height: 76px;
}
.logo {
    font-size: 22px; font-weight: 700; color: var(--text);
    letter-spacing: 0.5px;
}
.nav-links { display: flex; align-items: center; gap: 32px; }
.nav-links a {
    font-size: 14px; font-weight: 500; color: var(--text-light);
}
.nav-links a:hover { color: var(--primary); }
.nav-cta {
    background: var(--primary); color: #fff !important;
    padding: 10px 22px; transition: background 0.2s;
}
.nav-cta:hover { background: var(--primary-dark); }
.nav-login {
    padding-left: 24px;
    border-left: 1px solid var(--border);
}
.menu-toggle {
    display: none; background: none; border: none; cursor: pointer;
    flex-direction: column; gap: 5px; padding: 8px;
}
.menu-toggle span {
    display: block; width: 22px; height: 2px; background: var(--text);
    transition: 0.3s;
}

/* Buttons */
.btn {
    display: inline-flex; align-items: center; justify-content: center;
    padding: 13px 30px; font-size: 14px; font-weight: 500;
    cursor: pointer; transition: all 0.2s; border-radius: 2px;
}
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-dark); }
.btn-outline { border: 1.5px solid var(--primary); color: var(--primary); background: transparent; }
.btn-outline:hover { background: var(--primary); color: #fff; }
.btn-ghost { background: rgba(255,255,255,0.9); color: var(--text); }
.btn-ghost:hover { background: #fff; }
.btn-sm { padding: 9px 20px; font-size: 13px; }
.btn-full { width: 100%; }

/* Sections */
section { padding: 100px 0; }
.sec-head { margin-bottom: 56px; }
.sec-head.center { text-align: center; }
.sec-tag {
    display: inline-block;
    font-size: 12px; font-weight: 600; color: var(--primary);
    letter-spacing: 2px; margin-bottom: 12px;
    text-transform: uppercase;
}
.sec-head h2 {
    font-size: 38px; font-weight: 700; line-height: 1.25;
    color: var(--text);
}
.sec-desc {
    font-size: 16px; color: var(--text-light); margin-top: 16px;
    max-width: 600px;
}
.sec-head.center .sec-desc { margin-left: auto; margin-right: auto; }
.sec-tag.light { color: rgba(255,255,255,0.6); }
.sec-head.light h2 { color: #fff; }

/* Hero */
.hero {
    padding-top: 180px; padding-bottom: 100px;
    background: linear-gradient(180deg, #f0eee9 0%, var(--bg) 100%);
}
.hero-inner {
    display: grid; grid-template-columns: 1.2fr 1fr;
    gap: 72px; align-items: center;
}
.hero-tag {
    display: inline-block; padding: 6px 16px;
    background: rgba(107,124,107,0.1); color: var(--primary);
    font-size: 13px; font-weight: 500; border-radius: 2px;
    margin-bottom: 28px;
}
.hero-content h1 {
    font-size: 54px; font-weight: 700; line-height: 1.15;
    color: var(--text); margin-bottom: 28px;
}
.hero-sub {
    font-size: 16px; color: var(--text-light); line-height: 1.8;
    margin-bottom: 40px; max-width: 560px;
}
.hero-btns {
    display: flex; align-items: center; gap: 12px;
    margin-bottom: 56px; flex-wrap: wrap;
}
.tel-link {
    display: inline-flex; align-items: center; gap: 8px;
    font-size: 15px; font-weight: 500; color: var(--text);
    margin-left: 16px;
}
.tel-icon { font-size: 18px; }
.hero-stats {
    display: flex; gap: 48px; padding-top: 32px;
    border-top: 1px solid var(--border);
}
.hero-stats div strong {
    display: block; font-size: 32px; font-weight: 700;
    color: var(--primary); font-family: 'DM Sans', sans-serif;
}
.hero-stats div span {
    font-size: 13px; color: var(--text-light);
}
.hero-visual { position: relative; }
.hero-img {
    width: 100%; border-radius: 8px;
    box-shadow: 0 20px 60px rgba(0,0,0,0.08);
}
.hero-card {
    position: absolute; background: #fff;
    padding: 14px 18px; border-radius: 8px;
    box-shadow: 0 8px 30px rgba(0,0,0,0.1);
    display: flex; align-items: center; gap: 12px;
    font-size: 13px;
}
.card-1 { bottom: 30px; left: -30px; }
.card-2 { top: 30px; right: -20px; }
.hero-card strong { display: block; font-weight: 600; font-size: 13px; }
.hero-card p { color: var(--text-light); font-size: 12px; margin: 0; }
.dot {
    width: 10px; height: 10px; border-radius: 50%;
}
.dot.green { background: #68b684; }
.dot.blue { background: #6b8cff; }

/* Platforms */
.plat-grid {
    display: grid; grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}
.plat-card {
    background: var(--card); padding: 36px 32px;
    border: 1px solid var(--border); border-radius: 6px;
    transition: all 0.3s;
}
.plat-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 40px rgba(0,0,0,0.06);
    border-color: var(--primary);
}
.plat-icon {
    width: 56px; height: 56px;
    border-radius: 8px;
    display: flex; align-items: center; justify-content: center;
    margin-bottom: 24px;
    color: #fff;
}
.icon-dy { background: #1a1a1a; }
.icon-xhs { background: #ff2442; }
.icon-wx { background: #07c160; }
.icon-ks { background: #ff4906; }
.icon-bili { background: #00a1d6; }
.icon-all { background: var(--primary); }
.plat-card h3 {
    font-size: 20px; font-weight: 600; margin-bottom: 12px;
}
.plat-card p {
    font-size: 14px; color: var(--text-light); line-height: 1.7;
    margin-bottom: 20px;
}
.plat-link {
    font-size: 14px; font-weight: 500; color: var(--primary);
}
.plat-link:hover { color: var(--primary-dark); }

/* Services */
.services { background: #fff; }
.svc-cat {
    display: flex; justify-content: center; gap: 8px;
    flex-wrap: wrap; margin-bottom: 48px;
}
.cat-btn {
    background: transparent; border: 1px solid var(--border);
    padding: 10px 24px; font-size: 14px; font-weight: 500;
    color: var(--text-light); cursor: pointer; border-radius: 2px;
    transition: all 0.2s; font-family: inherit;
}
.cat-btn.active, .cat-btn:hover {
    background: var(--primary); border-color: var(--primary); color: #fff;
}
.cat-panel { display: none; }
.cat-panel.active { display: block; }
.svc-grid {
    display: grid; grid-template-columns: repeat(2, 1fr);
    gap: 24px;
}
.svc-card {
    background: var(--bg); padding: 36px; border-radius: 6px;
    border: 1px solid transparent;
    transition: all 0.3s;
    display: flex; flex-direction: column;
}
.svc-card.feature {
    grid-column: span 1;
    background: #fff;
    border-color: var(--border);
}
.svc-card:hover {
    border-color: var(--primary);
}
.svc-tag {
    display: inline-block; padding: 4px 12px;
    background: var(--primary); color: #fff;
    font-size: 12px; border-radius: 2px; margin-bottom: 20px;
    align-self: flex-start;
}
.svc-card h3 {
    font-size: 20px; font-weight: 600; margin-bottom: 14px;
}
.svc-desc {
    font-size: 14px; color: var(--text-light); line-height: 1.7;
    margin-bottom: 20px; flex: 1;
}
.svc-items {
    margin-bottom: 24px;
    display: grid; grid-template-columns: 1fr 1fr; gap: 8px;
}
.svc-items li {
    font-size: 13px; color: #555;
}
.svc-footer {
    display: flex; align-items: center; justify-content: space-between;
    padding-top: 20px; border-top: 1px solid var(--border);
}
.svc-price {
    font-size: 17px; font-weight: 600; color: var(--primary);
}

/* Advantages */
.advantages { background: var(--primary); color: #fff; }
.adv-grid {
    display: grid; grid-template-columns: repeat(3, 1fr);
    gap: 36px;
}
.adv-item {
    padding: 32px; background: rgba(255,255,255,0.08);
    border-radius: 6px;
}
.adv-icon {
    width: 52px; height: 52px;
    background: rgba(255,255,255,0.15);
    border-radius: 8px;
    display: flex; align-items: center; justify-content: center;
    margin-bottom: 24px; color: #fff;
}
.adv-item h3 {
    font-size: 18px; font-weight: 600; margin-bottom: 12px;
}
.adv-item p {
    font-size: 14px; color: rgba(255,255,255,0.75); line-height: 1.7;
}

/* Process */
.proc-steps {
    display: grid; grid-template-columns: repeat(4, 1fr);
    gap: 24px; position: relative;
}
.step { text-align: center; position: relative; }
.step-num {
    width: 60px; height: 60px;
    background: var(--bg); border: 2px solid var(--primary);
    color: var(--primary);
    border-radius: 50%;
    display: flex; align-items: center; justify-content: center;
    font-size: 22px; font-weight: 700;
    margin: 0 auto 24px;
    font-family: 'DM Sans', sans-serif;
    position: relative; z-index: 2;
}
.step-line {
    position: absolute; top: 30px;
    left: calc(50% + 30px); right: calc(-50% + 30px);
    height: 2px; background: var(--border);
    z-index: 1;
}
.step:last-child .step-line { display: none; }
.step h3 {
    font-size: 17px; font-weight: 600; margin-bottom: 10px;
}
.step p {
    font-size: 14px; color: var(--text-light); line-height: 1.7;
}

/* Promise */
.promise-grid {
    display: grid; grid-template-columns: repeat(2, 1fr);
    gap: 24px;
}
.promise-item {
    padding: 32px; background: #fff;
    border-radius: 6px; border-left: 4px solid var(--primary);
}
.promise-item h4 {
    font-size: 17px; font-weight: 600; margin-bottom: 12px;
}
.promise-item p {
    font-size: 14px; color: var(--text-light); line-height: 1.7;
}

/* News */
.news { background: var(--bg); }
ul.article-cards {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: 24px;
    list-style: none; margin: 0; padding: 0; width: 100%;
    box-sizing: border-box;
}
ul.article-cards > li.article-card {
    min-width: 0; width: auto; max-width: none;
    margin: 0; float: none; box-sizing: border-box;
    background: #fff; border-radius: 6px; overflow: hidden;
    border: 1px solid var(--border);
    transition: all 0.3s;
}
ul.article-cards > li.article-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 40px rgba(0,0,0,0.08);
}
.article-card a { display: block; }
.article-card .card-thumb { width: 100%; overflow: hidden; }
.article-card .card-thumb img {
    display: block; width: 100%; max-width: 100%;
    height: 200px; object-fit: cover;
    transition: transform 0.5s;
}
.article-card:hover .card-thumb img { transform: scale(1.05); }
.article-card .card-body { padding: 24px; }
.article-card .card-title {
    overflow-wrap: anywhere;
    font-size: 16px; font-weight: 600; line-height: 1.5;
    margin-bottom: 10px; color: var(--text);
}
.article-card .card-date {
    display: block; font-size: 12px; color: var(--text-light);
    margin-bottom: 8px;
}
.article-card .card-summary {
    overflow-wrap: anywhere;
    font-size: 13px; color: var(--text-light); line-height: 1.6;
    display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical;
    overflow: hidden;
}

/* FAQ */
.faq-wrap { max-width: 800px; margin: 0 auto; }
.faq-item {
    border-bottom: 1px solid var(--border);
}
.faq-q {
    width: 100%; background: none; border: none; cursor: pointer;
    padding: 24px 0; text-align: left;
    font-size: 16px; font-weight: 500; color: var(--text);
    display: flex; justify-content: space-between; align-items: center;
    gap: 16px; font-family: inherit;
}
.faq-icon {
    font-size: 22px; font-weight: 300; color: var(--primary);
    transition: transform 0.3s; font-style: normal;
    width: 24px; text-align: center;
}
.faq-item.open .faq-icon { transform: rotate(45deg); }
.faq-a {
    max-height: 0; overflow: hidden; transition: max-height 0.3s;
}
.faq-item.open .faq-a { max-height: 300px; }
.faq-a p {
    padding-bottom: 24px; font-size: 14px;
    color: var(--text-light); line-height: 1.8;
}

/* About */
.about { background: #fff; }
.about-grid {
    display: grid; grid-template-columns: 1.5fr 1fr;
    gap: 72px; align-items: start;
}
.about-lead {
    font-size: 18px; line-height: 1.8; margin: 20px 0 24px;
    color: var(--text);
}
.about-text p {
    font-size: 15px; color: #555; line-height: 1.8;
    margin-bottom: 16px;
}
.about .btn { margin-top: 24px; }
.about-data {
    display: grid; grid-template-columns: 1fr 1fr; gap: 1px;
    background: var(--border); border-radius: 6px; overflow: hidden;
}
.data-item {
    background: #fff; padding: 32px 24px; text-align: center;
}
.data-item strong {
    display: block; font-size: 36px; font-weight: 700;
    color: var(--primary); font-family: 'DM Sans', sans-serif;
    margin-bottom: 8px;
}
.data-item span {
    font-size: 14px; color: var(--text-light);
}

/* Apply */
.apply { background: #3d493d; }
.apply-inner {
    display: grid; grid-template-columns: 1fr 1fr;
    gap: 72px; align-items: start;
}
.apply-info h2 {
    font-size: 36px; font-weight: 700; color: #fff;
    line-height: 1.25; margin: 12px 0 24px;
}
.apply-info > p {
    color: rgba(255,255,255,0.7); font-size: 15px; line-height: 1.8;
    margin-bottom: 40px;
}
.contact-list { display: grid; gap: 20px; }
.contact-item {
    padding-bottom: 20px; border-bottom: 1px solid rgba(255,255,255,0.1);
}
.c-label {
    display: block; font-size: 12px; color: rgba(255,255,255,0.5);
    margin-bottom: 6px; text-transform: uppercase; letter-spacing: 1px;
}
.c-value {
    font-size: 18px; font-weight: 500; color: #fff;
}
.c-value:hover { color: rgba(255,255,255,0.8); }
.apply-form {
    background: #fff; padding: 40px; border-radius: 8px;
}
.apply-form h3 {
    font-size: 22px; font-weight: 600; margin-bottom: 28px;
}
.form-row {
    display: grid; grid-template-columns: 1fr 1fr; gap: 16px;
}
.form-grp { margin-bottom: 18px; }
.form-grp label {
    display: block; font-size: 13px; font-weight: 500;
    color: var(--text); margin-bottom: 8px;
}
.form-grp input, .form-grp select, .form-grp textarea {
    width: 100%; padding: 11px 14px;
    border: 1px solid var(--border); border-radius: 4px;
    font-size: 14px; font-family: inherit; color: var(--text);
    background: var(--bg);
    transition: border-color 0.2s;
}
.form-grp textarea { resize: vertical; }
.form-grp input:focus, .form-grp select:focus, .form-grp textarea:focus {
    outline: none; border-color: var(--primary);
    background: #fff;
}
.form-grp input::placeholder, .form-grp textarea::placeholder {
    color: #a0aec0;
}
.form-grp select option { background: #fff; }
.apply-form .btn {
    margin-top: 12px;
}

/* Footer */
.site-footer {
    background: #2d342d; color: rgba(255,255,255,0.6);
    padding: 64px 0 28px; font-size: 14px;
}
.footer-grid {
    display: grid; grid-template-columns: 2fr 1fr 1fr 1fr 1fr;
    gap: 40px; padding-bottom: 48px;
    border-bottom: 1px solid rgba(255,255,255,0.1);
}
.f-brand h3 {
    font-size: 22px; font-weight: 700; color: #fff; margin-bottom: 16px;
}
.f-brand p { margin-bottom: 10px; line-height: 1.7; }
.f-tel { padding-top: 8px; }
.f-tel a { color: #fff; font-weight: 500; }
.f-col h4 {
    font-size: 14px; font-weight: 600; color: #fff; margin-bottom: 20px;
}
.f-col a {
    display: block; padding: 6px 0;
    transition: color 0.2s;
}
.f-col a:hover { color: #fff; }
.footer-bottom {
    padding-top: 28px; text-align: center;
    color: rgba(255,255,255,0.4); font-size: 13px;
}

/* Article */
.crumb-bar { padding: 100px 0 24px; background: #fff; border-bottom: 1px solid var(--border); }
.crumb-bar a { color: var(--text-light); font-size: 13px; }
.crumb-bar span { color: #b0b0b0; margin: 0 8px; font-size: 13px; }
.crumb-bar a:hover { color: var(--primary); }
.art-detail { padding: 48px 0 80px; }
.art-wrap {
    display: grid; grid-template-columns: 1fr 280px;
    gap: 48px; align-items: start;
}
.art-main {
    background: #fff; padding: 48px; border-radius: 8px;
    border: 1px solid var(--border);
}
.art-head { margin-bottom: 32px; padding-bottom: 24px; border-bottom: 1px solid var(--border); }
.art-head h1 {
    font-size: 32px; font-weight: 700; line-height: 1.35;
    color: var(--text); margin-bottom: 16px;
}
.art-meta-row {
    display: flex; flex-direction: column; gap: 8px;
}
.art-sum { font-size: 15px; color: var(--text-light); line-height: 1.7; }
.art-time { font-size: 13px; color: #a0aec0; }
.art-cover { margin-bottom: 36px; border-radius: 6px; overflow: hidden; }
.art-cover img { width: 100%; }
.art-body { font-size: 16px; line-height: 1.9; color: #444; }
.art-body p { margin-bottom: 20px; }
.art-body h2, .art-body h3, .art-body h4 {
    margin: 32px 0 16px; font-weight: 600; color: var(--text);
}
.art-body h2 { font-size: 24px; }
.art-body h3 { font-size: 20px; }
.art-body h4 { font-size: 18px; }
.art-body img { max-width: 100%; border-radius: 6px; margin: 24px 0; }
.art-body ul, .art-body ol { margin: 16px 0; padding-left: 24px; }
.art-body li { margin-bottom: 8px; }
.art-body blockquote {
    border-left: 4px solid var(--primary);
    padding: 16px 24px; margin: 24px 0;
    background: var(--bg); border-radius: 0 4px 4px 0;
    color: #555;
}
.side-card {
    background: #fff; padding: 28px; border-radius: 8px;
    border: 1px solid var(--border); margin-bottom: 20px;
}
.side-card h4 {
    font-size: 16px; font-weight: 600; margin-bottom: 12px;
}
.side-card p {
    font-size: 13px; color: var(--text-light); line-height: 1.7;
    margin-bottom: 16px;
}
.side-tel { margin-top: 16px; padding-top: 16px; border-top: 1px solid var(--border); margin-bottom: 0; }
.side-tel a { color: var(--primary); font-weight: 500; }
.side-list li {
    padding: 10px 0; border-bottom: 1px solid var(--border);
    font-size: 14px;
}
.side-list li:last-child { border-bottom: none; }
.side-list li a:hover { color: var(--primary); }
.art-nav { margin-top: 40px; text-align: center; }
.back-btn {
    display: inline-block; font-size: 14px; color: var(--text-light);
    padding: 10px 24px; border: 1px solid var(--border);
    border-radius: 4px; transition: all 0.2s;
}
.back-btn:hover { border-color: var(--primary); color: var(--primary); }

/* Responsive */
@media (max-width: 1024px) {
    .hero-inner { grid-template-columns: 1fr; gap: 48px; }
    .hero-visual { max-width: 500px; margin: 0 auto; }
    .card-1 { left: 0; }
    .card-2 { right: 0; }
    .plat-grid { grid-template-columns: repeat(2, 1fr); }
    .svc-grid { grid-template-columns: 1fr; }
    .adv-grid { grid-template-columns: repeat(2, 1fr); }
    .proc-steps { grid-template-columns: repeat(2, 1fr); gap: 32px; }
    .step-line { display: none; }
    .about-grid { grid-template-columns: 1fr; gap: 48px; }
    .apply-inner { grid-template-columns: 1fr; gap: 48px; }
    .footer-grid { grid-template-columns: 1fr 1fr; }
    .art-wrap { grid-template-columns: 1fr; }
}
@media (max-width: 768px) {
    .container { padding: 0 20px; }
    section { padding: 64px 0; }
    .hero { padding-top: 130px; padding-bottom: 64px; }
    .hero-content h1 { font-size: 36px; }
    .sec-head h2 { font-size: 28px; }
    .hero-stats { flex-wrap: wrap; gap: 24px; }
    .hero-stats div strong { font-size: 24px; }
    .hero-card { display: none; }
    .plat-grid { grid-template-columns: 1fr; }
    .promise-grid { grid-template-columns: 1fr; }
    .form-row { grid-template-columns: 1fr; }
    .apply-form { padding: 28px 24px; }
    .about-data { grid-template-columns: 1fr 1fr; }
    .menu-toggle { display: flex; }
    .nav-links {
        display: none; position: absolute; top: 76px; left: 0; right: 0;
        background: #fff; flex-direction: column; gap: 0;
        padding: 12px 20px; border-bottom: 1px solid var(--border);
    }
    .nav-links.open { display: flex; }
    .nav-links a { padding: 14px 0; border-bottom: 1px solid #f0f0f0; }
    .nav-login { padding-left: 0 !important; border-left: none !important; }
    .nav-cta { text-align: center; margin: 8px 0; }
    .footer-grid { grid-template-columns: 1fr; gap: 32px; }
    .art-main { padding: 28px 20px; }
    .art-head h1 { font-size: 24px; }
}

@media (prefers-reduced-motion: reduce) {
    * { animation: none !important; transition: none !important; }
}

/* Toast */
.toast {
    position: fixed; bottom: 40px; left: 50%; transform: translateX(-50%);
    background: var(--primary); color: #fff; padding: 14px 32px;
    border-radius: 4px; font-size: 14px; z-index: 9999;
    opacity: 0; pointer-events: none; transition: opacity 0.3s;
    box-shadow: 0 8px 30px rgba(0,0,0,0.15);
}
.toast.show { opacity: 1; }