/* ========== 基础样式 ========== */
:root {
    --primary: #1a5fb4;
    --primary-dark: #124a8f;
    --primary-light: #e8f0fb;
    --accent: #c9a227;
    --text: #2b3440;
    --text-light: #6b7684;
    --bg: #ffffff;
    --bg-alt: #f5f7fa;
    --border: #e3e8ef;
    --shadow: 0 8px 30px rgba(20, 40, 70, 0.08);

    /* 报刊/杂志字栈 */
    --font-serif-cn: "Source Han Serif SC", "Noto Serif SC", "思源宋体", "Songti SC", "STSong", "SimSun", "宋体", Georgia, "Times New Roman", serif;
    --font-display: "Cormorant Garamond", "Source Han Serif SC", "Noto Serif SC", Georgia, "Times New Roman", serif;
    --font-body: var(--font-serif-cn);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-body);
    color: var(--text);
    background: var(--bg);
    line-height: 1.85;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.container {
    max-width: 1140px;
    margin: 0 auto;
    padding: 0 24px;
}

/* ========== 导航栏 ========== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border);
    transition: box-shadow 0.3s;
}

.navbar.scrolled {
    box-shadow: var(--shadow);
}

.nav-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 68px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
}

.logo-mark {
    width: 56px;
    height: 38px;
    display: block;
    object-fit: contain;
}

.logo-text {
    color: var(--text);
    font-weight: 600;
    font-size: 16px;
}

.nav-links {
    display: flex;
    gap: 8px;
}

.nav-links a {
    color: var(--text);
    text-decoration: none;
    font-size: 15px;
    padding: 8px 14px;
    border-radius: 6px;
    transition: color 0.2s, background 0.2s;
}

.nav-links a:hover,
.nav-links a.active {
    color: var(--primary);
    background: var(--primary-light);
}

.lang-switch {
    margin-left: 6px;
    padding: 6px 12px !important;
    border: 1px solid var(--border);
    border-radius: 999px !important;
    font-size: 13px !important;
    letter-spacing: 1px;
    color: var(--text-light);
    background: var(--bg-alt);
}

.lang-switch:hover {
    color: var(--primary);
    border-color: var(--primary);
    background: var(--primary-light);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 6px;
}

.nav-toggle span {
    width: 22px;
    height: 2px;
    background: var(--text);
    border-radius: 2px;
}

/* ========== 首屏 ========== */
.hero {
    position: relative;
    min-height: 88vh;
    display: flex;
    align-items: center;
    text-align: center;
    overflow: hidden;
    padding-top: 68px;
}

.hero-bg {
    position: absolute;
    inset: 0;
    background:
        radial-gradient(ellipse at 20% 30%, rgba(26, 95, 180, 0.35), transparent 55%),
        radial-gradient(ellipse at 80% 70%, rgba(201, 162, 39, 0.22), transparent 55%),
        linear-gradient(160deg, #0d2b52 0%, #143d73 55%, #1a5fb4 100%);
}

.hero-content {
    position: relative;
    z-index: 1;
    color: #fff;
}

.hero-eyebrow {
    display: inline-block;
    font-size: 13px;
    letter-spacing: 3px;
    padding: 6px 16px;
    border: 1px solid rgba(255, 255, 255, 0.35);
    border-radius: 999px;
    margin-bottom: 22px;
    background: rgba(255, 255, 255, 0.08);
    font-family: var(--font-display);
    font-style: italic;
}

.hero-h2 {
    font-size: clamp(20px, 2.8vw, 26px);
    font-weight: 500;
    letter-spacing: 4px;
    opacity: 0.92;
    margin-bottom: 14px;
    font-family: var(--font-display);
}

/* ── 编辑型引言：slogan 上下细线（Pull-quote 杂志风） ── */
.hero-title {
    font-family: var(--font-display);
    font-size: clamp(32px, 5.4vw, 54px);
    font-weight: 500;
    letter-spacing: 8px;
    margin: 0 auto 22px;
    padding: 26px 0;
    position: relative;
    max-width: 880px;
}

.hero-title::before,
.hero-title::after {
    content: "";
    display: block;
    width: 80px;
    height: 1px;
    background: rgba(255, 255, 255, 0.5);
    margin: 0 auto;
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
}

.hero-title::before { top: 0; }
.hero-title::after  { bottom: 0; }

.hero-subtitle {
    font-family: var(--font-display);
    font-style: italic;
    font-size: clamp(15px, 2vw, 18px);
    opacity: 0.78;
    letter-spacing: 2px;
    margin-bottom: 30px;
    font-weight: 400;
}

.hero-tags span {
    font-family: var(--font-display);
    letter-spacing: 2px;
}

.hero-tags {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 12px;
    margin-bottom: 40px;
}

.hero-tags span {
    padding: 8px 22px;
    border: 1px solid rgba(255, 255, 255, 0.35);
    border-radius: 0;
    font-size: 14px;
    letter-spacing: 2px;
    background: rgba(255, 255, 255, 0.06);
    position: relative;
}

.hero-tags span::before,
.hero-tags span::after {
    content: "—";
    margin: 0 8px;
    opacity: 0.6;
}

.btn {
    display: inline-block;
    padding: 14px 42px;
    border-radius: 999px;
    text-decoration: none;
    font-size: 16px;
    letter-spacing: 2px;
    transition: transform 0.2s, box-shadow 0.2s;
}

.btn-primary {
    background: var(--accent);
    color: #fff;
    box-shadow: 0 6px 20px rgba(201, 162, 39, 0.4);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 26px rgba(201, 162, 39, 0.5);
}

/* ========== 通用区块 ========== */
.section {
    padding: 90px 0;
}

.section-alt {
    background: var(--bg-alt);
}

.section-head {
    text-align: center;
    margin-bottom: 56px;
}

/* ── 区块标题前装饰花饰（杂志章节分隔符） ── */
.section-head::before {
    content: "❋";
    display: block;
    color: var(--accent);
    font-size: 22px;
    margin-bottom: 16px;
    letter-spacing: 12px;
}

.section-title {
    font-family: var(--font-display);
    font-size: 34px;
    font-weight: 500;
    letter-spacing: 3px;
    color: var(--primary-dark);
}

.section-title::after {
    content: "";
    display: block;
    width: 36px;
    height: 1px;
    margin: 18px auto 0;
    background: var(--accent);
}

.section-subtitle {
    margin-top: 14px;
    color: var(--text-light);
    font-family: var(--font-display);
    font-style: italic;
    font-size: 13px;
    letter-spacing: 4px;
    text-transform: uppercase;
}

/* ========== 关于我们 ========== */
.about-grid {
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: 48px;
    align-items: center;
}

.about-text p {
    margin-bottom: 18px;
    color: var(--text);
    font-size: 16.5px;
    line-height: 2;
    text-align: justify;
    text-indent: 2em;
}

/* ── 首段首字下沉（Drop Cap，报刊经典） ── */
.about-text p:first-of-type::first-letter {
    font-family: var(--font-display);
    font-size: 3.6em;
    float: left;
    line-height: 0.9;
    padding: 6px 12px 0 0;
    color: var(--primary);
    font-weight: 500;
}

.about-stats {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

.stat-item {
    background: #fff;
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 26px 18px;
    text-align: center;
    box-shadow: var(--shadow);
}

.stat-num {
    font-family: var(--font-display);
    font-size: 38px;
    font-weight: 500;
    font-style: italic;
    color: var(--primary);
    letter-spacing: 1px;
}

.stat-num span {
    font-size: 15px;
    font-weight: 500;
    margin-left: 2px;
}

.stat-label {
    margin-top: 6px;
    color: var(--text-light);
    font-size: 14px;
}

/* ========== 业务板块 ========== */
.biz-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.biz-card {
    background: #fff;
    border: 1px solid var(--border);
    border-radius: 14px;
    padding: 32px 24px;
    box-shadow: var(--shadow);
    transition: transform 0.25s, box-shadow 0.25s;
    display: flex;
    flex-direction: column;
}

.biz-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 16px 40px rgba(20, 40, 70, 0.14);
}

.biz-icon {
    font-size: 40px;
    margin-bottom: 16px;
}

.biz-card h3 {
    font-family: var(--font-display);
    font-size: 21px;
    font-weight: 500;
    margin-bottom: 14px;
    color: var(--primary-dark);
    letter-spacing: 2px;
}

.biz-card p {
    font-size: 14px;
    color: var(--text-light);
    margin-bottom: 16px;
}

.biz-points {
    list-style: none;
    margin-top: auto;
    border-top: 1px dashed var(--border);
    padding-top: 14px;
}

.biz-points li {
    font-size: 13.5px;
    color: var(--text);
    padding: 4px 0 4px 20px;
    position: relative;
}

.biz-points li::before {
    content: "·";
    position: absolute;
    left: 6px;
    color: var(--accent);
    font-weight: 700;
}

/* ========== 核心优势 ========== */
.adv-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.adv-item {
    padding: 28px 22px;
    border-left: 3px solid var(--primary);
    background: linear-gradient(180deg, #fbfcfe, #f4f7fb);
    border-radius: 0 12px 12px 0;
}

.adv-num {
    font-family: var(--font-display);
    font-style: italic;
    font-size: 32px;
    font-weight: 500;
    color: var(--accent);
    margin-bottom: 10px;
    letter-spacing: 1px;
}

.adv-item h3 {
    font-size: 17px;
    margin-bottom: 10px;
}

.adv-item p {
    font-size: 14px;
    color: var(--text-light);
}

/* ========== FAQ ========== */
.biz-disclaimer {
    margin-top: 28px;
    padding: 14px 20px;
    background: #fff;
    border-left: 3px solid var(--accent);
    border-radius: 6px;
    font-size: 13.5px;
    color: var(--text-light);
    line-height: 1.8;
}

.faq-list {
    max-width: 880px;
    margin: 0 auto;
}

.faq-item {
    background: #fff;
    border: 1px solid var(--border);
    border-radius: 10px;
    margin-bottom: 14px;
    box-shadow: var(--shadow);
    transition: border-color 0.2s;
}

.faq-item[open] {
    border-color: var(--primary);
}

.faq-item summary {
    list-style: none;
    cursor: pointer;
    padding: 18px 24px;
    font-size: 16.5px;
    font-weight: 500;
    color: var(--text);
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 16px;
    letter-spacing: 0.5px;
}

.faq-item summary::-webkit-details-marker {
    display: none;
}

.faq-item summary::marker {
    display: none;
    content: "";
}

.faq-toggle {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    background: var(--primary-light);
    color: var(--primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    font-weight: 700;
    line-height: 1;
    flex-shrink: 0;
    transition: transform 0.25s, background 0.2s;
}

.faq-item[open] .faq-toggle {
    transform: rotate(45deg);
    background: var(--primary);
    color: #fff;
}

.faq-answer {
    padding: 0 24px 20px;
    color: var(--text);
    font-size: 14.5px;
    line-height: 1.95;
    border-top: 1px dashed var(--border);
}

.faq-answer p {
    padding-top: 14px;
}

/* ========== 联系我们 ========== */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
}

.contact-info,
.contact-note {
    background: #fff;
    border: 1px solid var(--border);
    border-radius: 14px;
    padding: 36px 32px;
    box-shadow: var(--shadow);
}

.contact-info h3 {
    font-family: var(--font-display);
    font-size: 23px;
    font-weight: 500;
    margin-bottom: 8px;
    color: var(--primary-dark);
    letter-spacing: 2px;
}

.contact-slogan {
    font-family: var(--font-display);
    font-style: italic;
    color: var(--accent);
    font-size: 15px;
    letter-spacing: 2px;
    margin-bottom: 22px;
    padding-left: 14px;
    border-left: 2px solid var(--accent);
}

.contact-item {
    display: flex;
    flex-direction: column;
    gap: 2px;
    padding: 12px 0;
    border-bottom: 1px dashed var(--border);
}

.contact-item:last-child {
    border-bottom: none;
}

.contact-label {
    font-size: 13px;
    color: var(--text-light);
}

.contact-item a {
    color: var(--text);
    text-decoration: none;
    transition: color 0.2s;
}

.contact-item a:hover {
    color: var(--primary);
}

.contact-note h3 {
    font-size: 18px;
    margin-bottom: 14px;
}

.contact-note p {
    font-size: 14.5px;
    line-height: 1.95;
    color: var(--text-light);
    margin-bottom: 14px;
    text-indent: 2em;
}

/* ========== 页脚 ========== */
.footer {
    background: #0d2b52;
    color: rgba(255, 255, 255, 0.85);
    text-align: center;
    padding: 44px 0 32px;
}

.footer-name {
    font-family: var(--font-display);
    font-size: 18px;
    font-weight: 500;
    letter-spacing: 4px;
}

.footer-slogan {
    font-family: var(--font-display);
    font-style: italic;
    font-size: 13px;
    opacity: 0.65;
    margin: 8px 0 16px;
    letter-spacing: 3px;
}

.footer-copy {
    font-size: 12.5px;
    opacity: 0.5;
}

.footer-meta {
    font-size: 12.5px;
    opacity: 0.55;
    margin-bottom: 12px;
    letter-spacing: 1px;
}

/* ========== 响应式 ========== */
@media (max-width: 960px) {
    .biz-grid,
    .adv-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .about-grid {
        grid-template-columns: 1fr;
    }

    .contact-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 640px) {
    .nav-toggle {
        display: flex;
    }

    .nav-links {
        position: absolute;
        top: 68px;
        left: 0;
        right: 0;
        flex-direction: column;
        background: #fff;
        border-bottom: 1px solid var(--border);
        padding: 12px 24px 16px;
        display: none;
        box-shadow: var(--shadow);
    }

    .nav-links.open {
        display: flex;
    }

    .biz-grid,
    .adv-grid,
    .about-stats {
        grid-template-columns: 1fr;
    }

    .section {
        padding: 64px 0;
    }

    .logo-text {
        display: none;
    }
}