/* ============================================
   Invadigm - 主样式表
   主题色：深红 (#C8102E) / 深炭灰 (#1a1a1f)
   ============================================ */

/* ---------- 变量 ---------- */
:root {
    --red: #C8102E;
    --red-dark: #a30d24;
    --red-light: #e8244a;
    --ink: #1a1a1f;
    --ink-2: #26262e;
    --ink-3: #3a3a44;
    --gray-50: #f7f7f8;
    --gray-100: #eeeef1;
    --gray-200: #e1e1e6;
    --gray-300: #cfcfd6;
    --gray-500: #8a8a94;
    --gray-700: #55555e;
    --white: #ffffff;
    --green: #16a34a;
    --shadow-sm: 0 2px 8px rgba(26, 26, 31, .08);
    --shadow-md: 0 8px 28px rgba(26, 26, 31, .12);
    --shadow-lg: 0 18px 48px rgba(26, 26, 31, .18);
    --radius: 14px;
    --radius-sm: 10px;
    --radius-lg: 22px;
    --container: 1240px;
    --font: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", "Noto Sans CJK SC", "Segoe UI", Roboto, Arial, sans-serif;
}

/* ---------- 重置 ---------- */
*, *::before, *::after { box-sizing: border-box; }
* { margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
    font-family: var(--font);
    color: var(--ink);
    background: var(--white);
    line-height: 1.65;
    font-size: 16px;
    overflow-x: hidden;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; transition: color .2s ease; }
ul { list-style: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }
svg { display: block; }

/* ---------- 通用容器 ---------- */
.container {
    width: 100%;
    max-width: var(--container);
    margin: 0 auto;
    padding: 0 24px;
}

/* ---------- 按钮 ---------- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 26px;
    border-radius: 999px;
    font-size: 15px;
    font-weight: 600;
    line-height: 1;
    white-space: nowrap;
    transition: all .25s ease;
    cursor: pointer;
    border: 2px solid transparent;
}
.btn--primary { background: var(--red); color: var(--white); }
.btn--primary:hover { background: var(--red-dark); transform: translateY(-2px); box-shadow: 0 8px 20px rgba(200, 16, 46, .35); }
.btn--outline { background: transparent; color: var(--white); border-color: rgba(255,255,255,.6); }
.btn--outline:hover { background: var(--white); color: var(--ink); border-color: var(--white); }
.btn--ghost { background: transparent; color: var(--ink); }
.btn--ghost:hover { color: var(--red); }
.btn--light { background: var(--white); color: var(--red); }
.btn--light:hover { background: var(--gray-100); transform: translateY(-2px); }
.btn--outline-light { background: transparent; color: var(--white); border-color: rgba(255,255,255,.7); }
.btn--outline-light:hover { background: rgba(255,255,255,.15); }
.btn--lg { padding: 16px 34px; font-size: 16px; }

/* ---------- 区块标题 ---------- */
.section-title {
    font-size: clamp(26px, 4vw, 40px);
    font-weight: 800;
    line-height: 1.2;
    letter-spacing: -.5px;
}
.section-title--light { color: var(--white); }

/* ============================================
   风险提示条
   ============================================ */
.risk-bar {
    background: var(--ink);
    color: rgba(255,255,255,.78);
    font-size: 12.5px;
    text-align: center;
    padding: 7px 16px;
}
.risk-bar__inner { display: flex; justify-content: center; }

/* ============================================
   页头
   ============================================ */
.site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(255,255,255,.96);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--gray-100);
    transition: box-shadow .3s ease;
}
.site-header.is-scrolled { box-shadow: var(--shadow-sm); }
.header__inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
}
.brand { display: flex; align-items: center; gap: 12px; }
.brand__logo {
    width: 42px;
    height: 42px;
    border-radius: 11px;
    object-fit: cover;
}
.brand__name {
    font-size: 22px;
    font-weight: 800;
    letter-spacing: -.5px;
    color: var(--ink);
}
.header__actions { display: flex; align-items: center; gap: 12px; }
.header__toggle {
    display: none;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    width: 44px;
    height: 44px;
    border-radius: 10px;
}
.header__toggle span {
    display: block;
    width: 24px;
    height: 2.5px;
    background: var(--ink);
    border-radius: 2px;
    transition: all .3s ease;
}
.header__toggle.is-open span:nth-child(1) { transform: translateY(7.5px) rotate(45deg); }
.header__toggle.is-open span:nth-child(2) { opacity: 0; }
.header__toggle.is-open span:nth-child(3) { transform: translateY(-7.5px) rotate(-45deg); }

/* 移动端菜单 */
.mobile-menu {
    display: none;
    flex-direction: column;
    gap: 4px;
    padding: 16px 24px 24px;
    background: var(--white);
    border-top: 1px solid var(--gray-100);
    max-height: 0;
    overflow: hidden;
    transition: max-height .35s ease, padding .35s ease;
}
.mobile-menu.is-open { max-height: 460px; padding: 16px 24px 24px; }
.mobile-menu a {
    padding: 13px 8px;
    font-size: 16px;
    font-weight: 600;
    border-bottom: 1px solid var(--gray-100);
    color: var(--ink);
}
.mobile-menu .mobile-menu__cta {
    margin-top: 14px;
    border-bottom: none;
    text-align: center;
}

/* ============================================
   英雄区
   ============================================ */
.hero {
    position: relative;
    background: var(--ink);
    color: var(--white);
    overflow: hidden;
    padding: 70px 0 90px;
}
.hero__bg {
    position: absolute;
    inset: 0;
    z-index: 0;
}
.hero__bg-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: .35;
}
.hero__bg::after {
    content: "";
    position: absolute;
    inset: 0;
    background: linear-gradient(105deg, rgba(26,26,31,.92) 0%, rgba(26,26,31,.7) 45%, rgba(200,16,46,.25) 100%);
}
.hero__content { position: relative; z-index: 2; max-width: 640px; }
.hero__title {
    font-size: clamp(34px, 6vw, 60px);
    font-weight: 800;
    line-height: 1.1;
    letter-spacing: -1px;
    margin-bottom: 18px;
}
.hero__subtitle {
    font-size: clamp(16px, 2.4vw, 20px);
    color: rgba(255,255,255,.82);
    margin-bottom: 30px;
    max-width: 540px;
}
.hero__actions {
    display: flex;
    flex-wrap: wrap;
    gap: 14px;
    margin-bottom: 18px;
}
.hero__risk { font-size: 13px; color: rgba(255,255,255,.55); }
.hero__cards { display: none; }

/* ============================================
   机遇区
   ============================================ */
.opportunity { padding: 80px 0; background: var(--gray-50); }
.opportunity__grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 56px;
    align-items: center;
}
.opportunity__text .section-title { margin-bottom: 24px; }
.opportunity__text p {
    font-size: 17px;
    color: var(--gray-700);
    margin-bottom: 16px;
}
.opportunity__text a { color: var(--red); font-weight: 600; }
.opportunity__text a:hover { text-decoration: underline; }
.opportunity__media {
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-md);
}
.opportunity__media img {
    width: 100%;
    height: 420px;
    object-fit: cover;
    transition: transform .6s ease;
}
.opportunity__media:hover img { transform: scale(1.04); }

/* ============================================
   数据统计区
   ============================================ */
.stats { padding: 80px 0; background: var(--white); }
.stats__grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}
.stat-card {
    background: var(--gray-50);
    border: 1px solid var(--gray-100);
    border-radius: var(--radius);
    padding: 34px 28px;
    text-align: center;
    transition: transform .3s ease, box-shadow .3s ease;
}
.stat-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-md); }
.stat-card__icon {
    width: 64px;
    height: 64px;
    margin: 0 auto 18px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--white);
    border-radius: 16px;
    box-shadow: var(--shadow-sm);
    overflow: hidden;
}
.stat-card__icon img { width: 40px; height: 40px; object-fit: contain; }
.stat-card__icon--star { color: var(--red); }
.stat-card__num {
    font-size: 44px;
    font-weight: 800;
    color: var(--red);
    line-height: 1;
    margin-bottom: 10px;
    letter-spacing: -1px;
}
.stat-card__title { font-size: 18px; font-weight: 700; margin-bottom: 8px; }
.stat-card__desc { font-size: 14px; color: var(--gray-700); margin-bottom: 14px; min-height: 42px; }
.stat-card__link { font-size: 14px; font-weight: 600; color: var(--red); }
.stat-card__link:hover { text-decoration: underline; }

/* ============================================
   实时报价区
   ============================================ */
.rates { padding: 80px 0; background: var(--ink); color: var(--white); }
.rates__head { margin-bottom: 28px; }
.rates__tabs {
    display: inline-flex;
    gap: 4px;
    background: rgba(255,255,255,.08);
    padding: 5px;
    border-radius: 999px;
    margin-bottom: 28px;
}
.rates__tab {
    padding: 10px 26px;
    border-radius: 999px;
    color: rgba(255,255,255,.7);
    font-size: 15px;
    font-weight: 600;
    transition: all .25s ease;
}
.rates__tab.is-active { background: var(--red); color: var(--white); }
.rates__panel { display: none; }
.rates__panel.is-active { display: block; animation: fadeIn .4s ease; }
@keyframes fadeIn { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: translateY(0); } }
.rates__table-wrap {
    background: var(--ink-2);
    border-radius: var(--radius);
    overflow: hidden;
    border: 1px solid rgba(255,255,255,.08);
}
.rates__table { width: 100%; border-collapse: collapse; }
.rates__table th, .rates__table td {
    padding: 16px 20px;
    text-align: right;
    font-size: 15px;
}
.rates__table th {
    background: rgba(255,255,255,.04);
    color: rgba(255,255,255,.6);
    font-weight: 600;
    font-size: 13px;
    text-transform: uppercase;
    letter-spacing: .5px;
}
.rates__table th:first-child, .rates__table td:first-child { text-align: left; font-weight: 700; }
.rates__table tbody tr { border-top: 1px solid rgba(255,255,255,.06); transition: background .2s ease; }
.rates__table tbody tr:hover { background: rgba(255,255,255,.04); }
.rates__table .up { color: var(--green); font-weight: 600; }
.rates__table .down { color: var(--red-light); font-weight: 600; }

/* ============================================
   交易者类型区
   ============================================ */
.audience { padding: 80px 0; background: var(--gray-50); }
.audience__grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 32px;
}
.audience__card {
    background: var(--white);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    display: flex;
    flex-direction: column;
    transition: transform .3s ease, box-shadow .3s ease;
}
.audience__card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); }
.audience__media { height: 220px; overflow: hidden; }
.audience__media img { width: 100%; height: 100%; object-fit: cover; }
.audience__body { padding: 32px; }
.audience__title { font-size: 24px; font-weight: 800; margin-bottom: 18px; }
.audience__list { margin-bottom: 24px; }
.audience__list li {
    position: relative;
    padding-left: 30px;
    margin-bottom: 12px;
    color: var(--gray-700);
    font-size: 15.5px;
}
.audience__list li::before {
    content: "";
    position: absolute;
    left: 0;
    top: 8px;
    width: 18px;
    height: 18px;
    background: var(--red);
    border-radius: 50%;
    -webkit-mask: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'><path fill='black' d='M9 16.2l-3.5-3.5L4 14.2l5 5 11-11-1.5-1.5z'/></svg>") center / 12px no-repeat;
            mask: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'><path fill='black' d='M9 16.2l-3.5-3.5L4 14.2l5 5 11-11-1.5-1.5z'/></svg>") center / 12px no-repeat;
}

/* ============================================
   为何选择我们
   ============================================ */
.why { padding: 80px 0; background: var(--white); }
.why__head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 20px;
    margin-bottom: 44px;
}
.why__grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
}
.why__card {
    padding: 38px 32px;
    border-radius: var(--radius-lg);
    background: var(--gray-50);
    border: 1px solid var(--gray-100);
    transition: transform .3s ease, box-shadow .3s ease;
}
.why__card:hover { transform: translateY(-6px); box-shadow: var(--shadow-md); background: var(--white); }
.why__icon {
    width: 72px;
    height: 72px;
    border-radius: 18px;
    background: linear-gradient(135deg, var(--red), var(--red-dark));
    color: var(--white);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 22px;
}
.why__card h3 { font-size: 21px; font-weight: 800; margin-bottom: 12px; }
.why__card p { color: var(--gray-700); font-size: 15.5px; }

/* ============================================
   专家分析
   ============================================ */
.analysis { padding: 80px 0; background: var(--gray-50); }
.analysis__head { margin-bottom: 44px; }
.analysis__grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}
.article-card {
    background: var(--white);
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: transform .3s ease, box-shadow .3s ease;
    display: flex;
    flex-direction: column;
}
.article-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-md); }
.article-card__media { display: block; height: 180px; overflow: hidden; }
.article-card__media img { width: 100%; height: 100%; object-fit: cover; transition: transform .5s ease; }
.article-card:hover .article-card__media img { transform: scale(1.06); }
.article-card__body { padding: 22px 20px 26px; flex: 1; display: flex; flex-direction: column; }
.article-card__date { font-size: 13px; color: var(--gray-500); margin-bottom: 10px; }
.article-card__title { font-size: 17px; font-weight: 700; line-height: 1.4; margin-bottom: 14px; flex: 1; }
.article-card__title a:hover { color: var(--red); }
.article-card__link { font-size: 14px; font-weight: 600; color: var(--red); }
.article-card__link:hover { text-decoration: underline; }

/* ============================================
   CTA 条
   ============================================ */
.cta-band {
    background: linear-gradient(120deg, var(--red) 0%, var(--red-dark) 100%);
    color: var(--white);
    padding: 64px 0;
}
.cta-band__inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 28px;
}
.cta-band__text h2 { font-size: clamp(24px, 3.5vw, 34px); font-weight: 800; margin-bottom: 8px; }
.cta-band__text p { font-size: 17px; opacity: .9; }
.cta-band__actions { display: flex; flex-wrap: wrap; gap: 14px; }

/* ============================================
   页脚
   ============================================ */
.site-footer { background: var(--ink); color: rgba(255,255,255,.7); padding: 64px 0 28px; }
.footer__top {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr 1fr;
    gap: 40px;
    padding-bottom: 44px;
    border-bottom: 1px solid rgba(255,255,255,.1);
}
.footer__brand .brand__name { color: var(--white); }
.footer__brand p { margin-top: 16px; font-size: 14.5px; max-width: 320px; line-height: 1.7; }
.footer__col h4 { color: var(--white); font-size: 15px; font-weight: 700; margin-bottom: 16px; }
.footer__col li { margin-bottom: 10px; }
.footer__col a { font-size: 14.5px; }
.footer__col a:hover { color: var(--red-light); }
.footer__bottom { padding-top: 24px; }
.footer__bottom p { font-size: 13px; }
.footer__risk { margin-top: 8px; color: rgba(255,255,255,.45); line-height: 1.6; }

/* ============================================
   顶部 Tab 导航栏
   ============================================ */
.tab-nav {
    background: var(--white);
    border-bottom: 1px solid var(--gray-100);
}
.tab-nav__inner {
    display: flex;
    align-items: center;
    gap: 4px;
    overflow-x: auto;
    scrollbar-width: none;
    -ms-overflow-style: none;
}
.tab-nav__inner::-webkit-scrollbar { display: none; }
.tab-nav__link {
    position: relative;
    padding: 16px 22px;
    font-size: 15px;
    font-weight: 600;
    color: var(--gray-700);
    white-space: nowrap;
    transition: color .2s ease;
}
.tab-nav__link::after {
    content: "";
    position: absolute;
    left: 22px;
    right: 22px;
    bottom: 0;
    height: 3px;
    border-radius: 3px 3px 0 0;
    background: var(--red);
    transform: scaleX(0);
    transform-origin: center;
    transition: transform .25s ease;
}
.tab-nav__link:hover { color: var(--ink); }
.tab-nav__link:hover::after { transform: scaleX(1); }
.tab-nav__link.is-active { color: var(--red); }
.tab-nav__link.is-active::after { transform: scaleX(1); }

/* ============================================
   新闻页 — 通用
   ============================================ */
.page-banner {
    background: linear-gradient(120deg, var(--ink) 0%, var(--ink-2) 100%);
    color: var(--white);
    padding: 56px 0 48px;
    position: relative;
    overflow: hidden;
}
.page-banner::after {
    content: "";
    position: absolute;
    right: -80px;
    top: -80px;
    width: 320px;
    height: 320px;
    background: radial-gradient(circle, rgba(200,16,46,.35), transparent 70%);
    border-radius: 50%;
}
.page-banner__inner { position: relative; z-index: 2; }
.breadcrumb {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 13.5px;
    color: rgba(255,255,255,.6);
    margin-bottom: 16px;
}
.breadcrumb a:hover { color: var(--white); }
.breadcrumb span { opacity: .5; }
.page-banner__title {
    font-size: clamp(28px, 4.5vw, 44px);
    font-weight: 800;
    letter-spacing: -.5px;
}
.page-banner__desc {
    margin-top: 12px;
    font-size: 16px;
    color: rgba(255,255,255,.72);
    max-width: 620px;
}

/* 分类筛选 */
.news-filter {
    padding: 28px 0 0;
    background: var(--gray-50);
}
.news-filter__inner {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}
.news-filter__btn {
    padding: 9px 22px;
    border-radius: 999px;
    background: var(--white);
    border: 1px solid var(--gray-200);
    color: var(--gray-700);
    font-size: 14.5px;
    font-weight: 600;
    transition: all .2s ease;
}
.news-filter__btn:hover { border-color: var(--red); color: var(--red); }
.news-filter__btn.is-active { background: var(--red); border-color: var(--red); color: var(--white); }

/* 新闻列表 */
.news-list { padding: 32px 0 80px; background: var(--gray-50); }
.news-featured {
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: 0;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    background: var(--white);
    margin-bottom: 40px;
}
.news-featured__media { height: 100%; min-height: 320px; overflow: hidden; }
.news-featured__media img { width: 100%; height: 100%; object-fit: cover; transition: transform .5s ease; }
.news-featured:hover .news-featured__media img { transform: scale(1.04); }
.news-featured__body { padding: 40px 38px; display: flex; flex-direction: column; justify-content: center; }
.news-tag {
    display: inline-block;
    align-self: flex-start;
    padding: 5px 14px;
    border-radius: 999px;
    background: rgba(200,16,46,.1);
    color: var(--red);
    font-size: 12.5px;
    font-weight: 700;
    margin-bottom: 16px;
}
.news-featured__title { font-size: clamp(22px, 3vw, 30px); font-weight: 800; line-height: 1.3; margin-bottom: 14px; }
.news-featured__title a:hover { color: var(--red); }
.news-featured__excerpt { color: var(--gray-700); font-size: 16px; margin-bottom: 20px; }
.news-meta { display: flex; align-items: center; gap: 14px; font-size: 13.5px; color: var(--gray-500); }
.news-meta__dot { width: 4px; height: 4px; border-radius: 50%; background: var(--gray-300); }

.news-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 26px;
}
.news-card {
    background: var(--white);
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: transform .3s ease, box-shadow .3s ease;
    display: flex;
    flex-direction: column;
}
.news-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-md); }
.news-card__media { display: block; height: 190px; overflow: hidden; }
.news-card__media img { width: 100%; height: 100%; object-fit: cover; transition: transform .5s ease; }
.news-card:hover .news-card__media img { transform: scale(1.06); }
.news-card__body { padding: 22px 22px 26px; flex: 1; display: flex; flex-direction: column; }
.news-card__tag { font-size: 12px; font-weight: 700; color: var(--red); margin-bottom: 10px; }
.news-card__title { font-size: 18px; font-weight: 700; line-height: 1.4; margin-bottom: 12px; flex: 1; }
.news-card__title a:hover { color: var(--red); }
.news-card__excerpt { font-size: 14px; color: var(--gray-700); margin-bottom: 16px; line-height: 1.6; }
.news-card .news-meta { margin-top: auto; }

/* 分页 */
.pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 8px;
    margin-top: 48px;
}
.pagination__btn {
    min-width: 44px;
    height: 44px;
    padding: 0 14px;
    border-radius: 10px;
    border: 1px solid var(--gray-200);
    background: var(--white);
    color: var(--gray-700);
    font-size: 15px;
    font-weight: 600;
    transition: all .2s ease;
}
.pagination__btn:hover { border-color: var(--red); color: var(--red); }
.pagination__btn.is-active { background: var(--red); border-color: var(--red); color: var(--white); }
.pagination__btn:disabled { opacity: .4; cursor: not-allowed; }

/* ============================================
   新闻详情页
   ============================================ */
.article-page { padding: 48px 0 80px; background: var(--white); }
.article-layout {
    display: grid;
    grid-template-columns: 1fr 320px;
    gap: 48px;
    align-items: start;
}
.article-main { max-width: 760px; }
.article-main__tag { margin-bottom: 16px; }
.article-main__title {
    font-size: clamp(26px, 4vw, 38px);
    font-weight: 800;
    line-height: 1.25;
    letter-spacing: -.5px;
    margin-bottom: 20px;
}
.article-main__meta {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 16px;
    padding-bottom: 24px;
    border-bottom: 1px solid var(--gray-100);
    margin-bottom: 32px;
    font-size: 14px;
    color: var(--gray-500);
}
.article-author { display: flex; align-items: center; gap: 10px; }
.article-author__avatar {
    width: 40px; height: 40px; border-radius: 50%;
    background: linear-gradient(135deg, var(--red), var(--red-dark));
    color: var(--white); display: flex; align-items: center; justify-content: center;
    font-weight: 700; font-size: 15px;
}
.article-author__name { font-weight: 600; color: var(--ink); }
.article-cover {
    border-radius: var(--radius-lg);
    overflow: hidden;
    margin-bottom: 36px;
}
.article-cover img { width: 100%; height: auto; }
.article-body { font-size: 17px; line-height: 1.85; color: var(--gray-700); }
.article-body p { margin-bottom: 22px; }
.article-body h2 { font-size: 24px; font-weight: 800; color: var(--ink); margin: 36px 0 16px; }
.article-body h3 { font-size: 20px; font-weight: 700; color: var(--ink); margin: 28px 0 14px; }
.article-body a { color: var(--red); font-weight: 600; }
.article-body a:hover { text-decoration: underline; }
.article-body ul { margin: 0 0 22px 4px; }
.article-body ul li { position: relative; padding-left: 26px; margin-bottom: 10px; }
.article-body ul li::before {
    content: ""; position: absolute; left: 0; top: 10px;
    width: 8px; height: 8px; border-radius: 2px; background: var(--red);
}
.article-body blockquote {
    border-left: 4px solid var(--red);
    background: var(--gray-50);
    padding: 20px 26px;
    border-radius: 0 12px 12px 0;
    margin: 0 0 26px;
    font-size: 18px;
    font-style: italic;
    color: var(--ink-3);
}
.article-body table { width: 100%; border-collapse: collapse; margin: 0 0 26px; font-size: 15px; }
.article-body table th, .article-body table td { padding: 13px 16px; border: 1px solid var(--gray-200); text-align: left; }
.article-body table th { background: var(--gray-50); font-weight: 700; color: var(--ink); }
.article-tags {
    display: flex; flex-wrap: wrap; gap: 10px;
    padding: 24px 0; border-top: 1px solid var(--gray-100);
    margin-top: 36px;
}
.article-tags__label { font-size: 14px; font-weight: 700; color: var(--ink); align-self: center; margin-right: 4px; }
.article-tags a {
    padding: 6px 16px; border-radius: 999px; background: var(--gray-50);
    border: 1px solid var(--gray-200); font-size: 13.5px; color: var(--gray-700);
}
.article-tags a:hover { border-color: var(--red); color: var(--red); }
.article-share {
    display: flex; align-items: center; gap: 14px;
    padding: 20px 0; border-top: 1px solid var(--gray-100);
}
.article-share__label { font-size: 14px; font-weight: 700; color: var(--ink); }
.article-share a {
    width: 40px; height: 40px; border-radius: 50%;
    background: var(--gray-50); border: 1px solid var(--gray-200);
    display: flex; align-items: center; justify-content: center;
    color: var(--gray-700); transition: all .2s ease;
}
.article-share a:hover { background: var(--red); border-color: var(--red); color: var(--white); }

/* 文章侧栏 */
.article-sidebar { position: sticky; top: 96px; }
.sidebar-block {
    background: var(--gray-50);
    border: 1px solid var(--gray-100);
    border-radius: var(--radius);
    padding: 26px 24px;
    margin-bottom: 24px;
}
.sidebar-block__title {
    font-size: 18px; font-weight: 800; margin-bottom: 18px;
    padding-bottom: 14px; border-bottom: 2px solid var(--red);
    display: inline-block;
}
.sidebar-news__item { display: flex; gap: 14px; padding: 14px 0; border-bottom: 1px solid var(--gray-200); }
.sidebar-news__item:last-child { border-bottom: none; padding-bottom: 0; }
.sidebar-news__item:first-child { padding-top: 0; }
.sidebar-news__num {
    flex-shrink: 0; width: 28px; height: 28px; border-radius: 8px;
    background: var(--red); color: var(--white);
    display: flex; align-items: center; justify-content: center;
    font-size: 13px; font-weight: 800;
}
.sidebar-news__title { font-size: 14.5px; font-weight: 600; line-height: 1.45; }
.sidebar-news__title a:hover { color: var(--red); }
.sidebar-news__date { font-size: 12.5px; color: var(--gray-500); margin-top: 4px; }
.sidebar-cta {
    background: linear-gradient(135deg, var(--red), var(--red-dark));
    color: var(--white); text-align: center;
}
.sidebar-cta h3 { font-size: 20px; font-weight: 800; margin-bottom: 10px; }
.sidebar-cta p { font-size: 14px; opacity: .9; margin-bottom: 18px; }

/* ============================================
   响应式 — 平板
   ============================================ */
@media (max-width: 1024px) {
    .stats__grid { grid-template-columns: repeat(2, 1fr); }
    .analysis__grid { grid-template-columns: repeat(2, 1fr); }
    .footer__top { grid-template-columns: 1fr 1fr 1fr; }
    .footer__brand { grid-column: 1 / -1; }
    .why__grid { grid-template-columns: 1fr; max-width: 520px; margin: 0 auto; }
    .news-grid { grid-template-columns: repeat(2, 1fr); }
    .article-layout { grid-template-columns: 1fr; }
    .article-sidebar { position: static; }
}

/* ============================================
   响应式 — 移动端
   ============================================ */
@media (max-width: 768px) {
    .container { padding: 0 18px; }
    .header__actions .btn--ghost,
    .header__actions .btn--primary { display: none; }
    .header__toggle { display: flex; }
    .mobile-menu { display: flex; }
    .brand__logo { width: 36px; height: 36px; }
    .brand__name { font-size: 19px; }

    .hero { padding: 50px 0 64px; }
    .hero__actions .btn { width: 100%; }

    .opportunity { padding: 56px 0; }
    .opportunity__grid { grid-template-columns: 1fr; gap: 32px; }
    .opportunity__media img { height: 280px; }
    .opportunity__text p { font-size: 16px; }

    .stats { padding: 56px 0; }
    .stats__grid { grid-template-columns: 1fr; }
    .stat-card { padding: 28px 22px; }
    .stat-card__desc { min-height: auto; }

    .rates { padding: 56px 0; }
    .rates__table-wrap { overflow-x: auto; }
    .rates__table { min-width: 480px; }
    .rates__table th, .rates__table td { padding: 13px 14px; font-size: 14px; }

    .audience { padding: 56px 0; }
    .audience__grid { grid-template-columns: 1fr; }
    .audience__body { padding: 26px 22px; }

    .why { padding: 56px 0; }
    .why__head { flex-direction: column; align-items: flex-start; }

    .analysis { padding: 56px 0; }
    .analysis__grid { grid-template-columns: 1fr; }

    .cta-band { padding: 48px 0; }
    .cta-band__inner { flex-direction: column; text-align: center; }
    .cta-band__actions { width: 100%; }
    .cta-band__actions .btn { flex: 1; }

    .site-footer { padding: 48px 0 24px; }
    .footer__top { grid-template-columns: 1fr 1fr; gap: 28px; }
    .footer__brand { grid-column: 1 / -1; }

    .news-featured { grid-template-columns: 1fr; }
    .news-featured__media { min-height: 220px; }
    .news-featured__body { padding: 30px 26px; }
    .news-grid { grid-template-columns: 1fr; }
    /* 移动端隐藏 Tab 栏，导航由汉堡菜单承担，避免重复与拥挤 */
    .tab-nav { display: none; }
    .article-body { font-size: 16px; }
}

@media (max-width: 480px) {
    .footer__top { grid-template-columns: 1fr; }
    .hero__title { font-size: 32px; }
    .btn--lg { padding: 14px 26px; font-size: 15px; }
}

/* 减少动画偏好 */
@media (prefers-reduced-motion: reduce) {
    * { animation: none !important; transition: none !important; scroll-behavior: auto !important; }
}