/* ==========================================================================
   Zentowin 前端网站样式表
   设计系统：深墨黑 + 酸橙绿 + 奶油白（与后台统一）
   字体：Space Grotesk + Noto Sans SC，等宽 JetBrains Mono
   圆角：2px 统一 / 间距：8px 网格
   ========================================================================== */

/* ----- 字体引入 ----- */
@import url('https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@400;500;600;700&family=Noto+Sans+SC:wght@400;500;700&family=JetBrains+Mono:wght@400;500&display=swap');

/* ----- 设计变量 ----- */
:root {
    --zt-black: #0e0e0e;
    --zt-lime: #c4ff00;
    --zt-cream: #f4f0e8;
    --zt-white: #ffffff;
    --zt-divider: #d4cfc0;
    --zt-muted: #8a8a8a;

    --zt-font-sans: 'Space Grotesk', 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --zt-font-mono: 'JetBrains Mono', 'SF Mono', Consolas, monospace;

    --zt-radius: 2px;
    --zt-header-h: 52px;
    --zt-max-width: 1200px;

    --zt-border: 1px solid var(--zt-divider);
    --zt-shadow: 0 1px 2px rgba(14, 14, 14, 0.04);
}

/* ==========================================================================
   1. 全局重置
   ========================================================================== */
*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 16px;
    -webkit-text-size-adjust: 100%;
    scroll-behavior: smooth;
}

body {
    font-family: var(--zt-font-sans);
    font-size: 16px;
    line-height: 1.6;
    color: var(--zt-black);
    background: var(--zt-cream);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

a {
    color: inherit;
    text-decoration: none;
    transition: color 0.15s ease;
}

img {
    max-width: 100%;
    display: block;
}

ul,
ol {
    list-style: none;
}

table {
    border-collapse: collapse;
    width: 100%;
}

code,
pre {
    font-family: var(--zt-font-mono);
}

button {
    font-family: inherit;
    cursor: pointer;
}

/* ==========================================================================
   2. 导航栏
   ========================================================================== */
.site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: var(--zt-cream);
    border-bottom: var(--zt-border);
}

.header-inner {
    max-width: var(--zt-max-width);
    margin: 0 auto;
    height: var(--zt-header-h);
    padding: 0 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 32px;
}

.brand {
    font-size: 18px;
    font-weight: 700;
    color: var(--zt-black);
    letter-spacing: -0.01em;
    white-space: nowrap;
}

.brand:hover {
    color: var(--zt-black);
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 32px;
    flex: 1;
    justify-content: flex-end;
}

.nav-menu a {
    font-size: 13px;
    font-weight: 500;
    color: var(--zt-black);
    padding: 4px 0;
    white-space: nowrap;
    position: relative;
}

.nav-menu a:hover {
    color: var(--zt-lime);
}

.nav-menu a.current {
    color: var(--zt-lime);
}

.nav-toggle {
    display: none;
    width: 32px;
    height: 32px;
    padding: 0;
    background: transparent;
    border: none;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 5px;
}

.nav-toggle span {
    display: block;
    width: 22px;
    height: 2px;
    background: var(--zt-black);
    transition: all 0.2s ease;
}

.nav-toggle.is-open span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}

.nav-toggle.is-open span:nth-child(2) {
    opacity: 0;
}

.nav-toggle.is-open span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

/* ==========================================================================
   3. Hero 区
   ========================================================================== */
.manifesto {
    min-height: 80vh;
    background: var(--zt-black);
    color: var(--zt-cream);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 96px 24px;
    text-align: center;
}

.manifesto-inner {
    max-width: 960px;
    margin: 0 auto;
}

.manifesto-eyebrow {
    display: inline-block;
    font-family: var(--zt-font-mono);
    font-size: 12px;
    color: var(--zt-lime);
    text-transform: uppercase;
    letter-spacing: 0.16em;
    padding: 6px 12px;
    border: 1px solid var(--zt-lime);
    border-radius: var(--zt-radius);
    margin-bottom: 32px;
}

.manifesto-title {
    font-size: clamp(2.4rem, 7vw, 5.5rem);
    font-weight: 700;
    line-height: 1.05;
    letter-spacing: -0.03em;
    margin-bottom: 24px;
}

.manifesto-support {
    font-size: 1.2rem;
    line-height: 1.6;
    color: var(--zt-cream);
    opacity: 0.78;
    max-width: 640px;
    margin: 0 auto 40px;
}

.manifesto-actions {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
}

/* ----- 按钮 ----- */
.btn-lime {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 14px 28px;
    font-family: var(--zt-font-sans);
    font-size: 14px;
    font-weight: 600;
    line-height: 1;
    color: var(--zt-black);
    background: var(--zt-lime);
    border: 1px solid var(--zt-lime);
    border-radius: var(--zt-radius);
    cursor: pointer;
    transition: all 0.15s ease;
    white-space: nowrap;
}

.btn-lime:hover {
    background: #b3eb00;
    border-color: #b3eb00;
    color: var(--zt-black);
}

.btn-lime:active {
    transform: translateY(1px);
}

.btn-lg {
    padding: 18px 36px;
    font-size: 15px;
}

.btn-ghost {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 14px 28px;
    font-family: var(--zt-font-sans);
    font-size: 14px;
    font-weight: 500;
    line-height: 1;
    color: var(--zt-cream);
    background: transparent;
    border: 1px solid var(--zt-cream);
    border-radius: var(--zt-radius);
    cursor: pointer;
    transition: all 0.15s ease;
    white-space: nowrap;
}

.btn-ghost:hover {
    background: var(--zt-cream);
    color: var(--zt-black);
}

/* ==========================================================================
   4. 认知区
   ========================================================================== */
.belief {
    padding: 120px 24px;
    background: var(--zt-cream);
}

.belief-inner {
    max-width: var(--zt-max-width);
    margin: 0 auto;
    display: grid;
    grid-template-columns: 200px 1fr;
    gap: 64px;
    align-items: start;
}

.belief-label {
    font-family: var(--zt-font-mono);
    font-size: 12px;
    color: var(--zt-muted);
    text-transform: uppercase;
    letter-spacing: 0.12em;
    padding-top: 8px;
}

.belief-body {
    font-size: 1.35rem;
    line-height: 1.55;
    color: var(--zt-black);
    font-weight: 400;
    letter-spacing: -0.005em;
}

.belief-body p + p {
    margin-top: 24px;
}

.belief-body strong {
    font-weight: 600;
    color: var(--zt-black);
}

/* ==========================================================================
   5. 案例区
   ========================================================================== */
.stories {
    padding: 120px 24px;
    background: var(--zt-black);
    color: var(--zt-cream);
}

.stories-inner {
    max-width: var(--zt-max-width);
    margin: 0 auto;
}

.stories-head {
    margin-bottom: 64px;
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    gap: 24px;
    flex-wrap: wrap;
}

.stories-head h2 {
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 700;
    letter-spacing: -0.02em;
    line-height: 1.1;
}

.stories-head .section-tag {
    font-family: var(--zt-font-mono);
    font-size: 12px;
    color: var(--zt-lime);
    text-transform: uppercase;
    letter-spacing: 0.12em;
}

.story {
    display: grid;
    grid-template-columns: 80px 1fr;
    gap: 40px;
    padding: 48px 0;
    border-top: 1px solid rgba(244, 240, 232, 0.12);
    align-items: start;
}

.story:last-child {
    border-bottom: 1px solid rgba(244, 240, 232, 0.12);
}

.story-num {
    font-family: var(--zt-font-mono);
    font-size: 13px;
    color: var(--zt-muted);
    padding-top: 4px;
}

.story-content {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.story-label {
    font-family: var(--zt-font-mono);
    font-size: 12px;
    color: var(--zt-lime);
    text-transform: uppercase;
    letter-spacing: 0.12em;
}

.story-client {
    font-size: 1.4rem;
    font-weight: 600;
    line-height: 1.3;
    color: var(--zt-cream);
    letter-spacing: -0.01em;
}

.story-text {
    font-size: 1rem;
    line-height: 1.7;
    color: rgba(244, 240, 232, 0.7);
}

.story-text.judgment {
    color: var(--zt-cream);
}

.story-text.result {
    color: var(--zt-lime);
    font-weight: 500;
}

/* ==========================================================================
   6. 方法论区
   ========================================================================== */
.method {
    padding: 120px 24px;
    background: var(--zt-cream);
}

.method-inner {
    max-width: var(--zt-max-width);
    margin: 0 auto;
}

.method-head {
    margin-bottom: 64px;
}

.method-head .section-tag {
    font-family: var(--zt-font-mono);
    font-size: 12px;
    color: var(--zt-muted);
    text-transform: uppercase;
    letter-spacing: 0.12em;
    margin-bottom: 16px;
    display: block;
}

.method-head h2 {
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 700;
    letter-spacing: -0.02em;
    line-height: 1.1;
}

.method-list {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0;
}

.method-item {
    padding: 32px 32px 32px 0;
    border-top: 2px solid var(--zt-black);
}

.method-item:nth-child(odd) {
    padding-right: 48px;
    border-right: var(--zt-border);
}

.method-item:nth-child(even) {
    padding-left: 48px;
}

.method-num {
    font-family: var(--zt-font-mono);
    font-size: 12px;
    color: var(--zt-muted);
    margin-bottom: 16px;
    display: block;
}

.method-name {
    font-size: 1.6rem;
    font-weight: 600;
    line-height: 1.25;
    color: var(--zt-black);
    margin-bottom: 16px;
    letter-spacing: -0.01em;
}

.method-desc {
    font-size: 1rem;
    line-height: 1.7;
    color: var(--zt-muted);
}

/* ==========================================================================
   7. 团队区
   ========================================================================== */
.team {
    padding: 120px 24px;
    background: #1a1a1a;
    color: var(--zt-cream);
}

.team-inner {
    max-width: var(--zt-max-width);
    margin: 0 auto;
    display: grid;
    grid-template-columns: 200px 1fr;
    gap: 64px;
    align-items: start;
}

.team-label {
    font-family: var(--zt-font-mono);
    font-size: 12px;
    color: var(--zt-muted);
    text-transform: uppercase;
    letter-spacing: 0.12em;
    padding-top: 8px;
}

.team-quote {
    font-size: 1.6rem;
    line-height: 1.5;
    font-weight: 400;
    color: var(--zt-cream);
    border-left: 3px solid var(--zt-lime);
    padding-left: 32px;
    letter-spacing: -0.01em;
}

.team-quote cite {
    display: block;
    font-style: normal;
    font-size: 0.9rem;
    color: var(--zt-muted);
    margin-top: 24px;
    font-family: var(--zt-font-mono);
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

/* ==========================================================================
   8. 研究区（首页）
   ========================================================================== */
.insights {
    padding: 120px 24px;
    background: var(--zt-cream);
}

.insights-inner {
    max-width: var(--zt-max-width);
    margin: 0 auto;
}

.insights-head {
    margin-bottom: 48px;
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    gap: 24px;
    flex-wrap: wrap;
}

.insights-head h2 {
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 700;
    letter-spacing: -0.02em;
    line-height: 1.1;
}

.insights-head .section-tag {
    font-family: var(--zt-font-mono);
    font-size: 12px;
    color: var(--zt-muted);
    text-transform: uppercase;
    letter-spacing: 0.12em;
}

.insights-head .insights-more {
    font-family: var(--zt-font-mono);
    font-size: 12px;
    color: var(--zt-black);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    border-bottom: 1px solid var(--zt-black);
    padding-bottom: 2px;
}

.insights-head .insights-more:hover {
    color: var(--zt-lime);
    border-bottom-color: var(--zt-lime);
}

.insight-item {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 24px;
    padding: 24px 0;
    border-top: var(--zt-border);
    transition: transform 0.2s ease;
}

.insight-item:last-child {
    border-bottom: var(--zt-border);
}

.insight-item:hover {
    transform: translateX(8px);
}

.insight-meta {
    flex: 0 0 auto;
    font-family: var(--zt-font-mono);
    font-size: 12px;
    color: var(--zt-muted);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    padding-top: 4px;
    width: 120px;
}

.insight-body {
    flex: 1;
}

.insight-title {
    font-size: 1.25rem;
    font-weight: 500;
    line-height: 1.4;
    color: var(--zt-black);
    margin-bottom: 8px;
    letter-spacing: -0.01em;
}

.insight-item:hover .insight-title {
    color: var(--zt-lime);
}

.insight-excerpt {
    font-size: 0.95rem;
    color: var(--zt-muted);
    line-height: 1.6;
}

.insight-arrow {
    flex: 0 0 auto;
    font-size: 1.4rem;
    color: var(--zt-muted);
    padding-top: 2px;
    transition: color 0.15s ease;
}

.insight-item:hover .insight-arrow {
    color: var(--zt-lime);
}

/* 精选文章 */
.featured-list {
    margin-bottom: 8px;
}

.insight-item.insight-featured {
    background: var(--zt-cream);
    padding: 24px;
    margin-bottom: 8px;
    border: 1px solid var(--zt-divider);
    border-radius: 2px;
}

.insight-item.insight-featured:last-child {
    border-bottom: 1px solid var(--zt-divider);
}

.insight-item.insight-featured .insight-title {
    font-size: 1.35rem;
    font-weight: 600;
}

.insight-item.insight-featured .insight-meta::before {
    content: '★ ';
    color: var(--zt-lime);
}

/* ==========================================================================
   9. 联系区
   ========================================================================== */
.contact {
    padding: 120px 24px;
    background: var(--zt-black);
    color: var(--zt-cream);
    text-align: center;
}

/* 退订页 */
.unsubscribe-page {
    padding: 80px 24px;
    min-height: 60vh;
    display: flex;
    align-items: center;
    justify-content: center;
}

.unsubscribe-inner {
    max-width: 560px;
    width: 100%;
    text-align: center;
}

.unsubscribe-inner .section-tag {
    display: inline-block;
    font-family: var(--zt-font-mono);
    font-size: 11px;
    color: var(--zt-muted);
    letter-spacing: 0.16em;
    margin-bottom: 16px;
}

.unsubscribe-title {
    font-size: 2rem;
    font-weight: 700;
    color: var(--zt-black);
    margin-bottom: 24px;
    letter-spacing: -0.02em;
}

.unsubscribe-text {
    font-size: 1rem;
    line-height: 1.8;
    color: #555;
    margin-bottom: 16px;
}

.unsubscribe-form {
    margin: 32px 0 16px;
}

.unsubscribe-form .btn-lime {
    padding: 12px 32px;
    font-family: var(--zt-font-mono);
    font-size: 14px;
    font-weight: 600;
    border: none;
    cursor: pointer;
}

.unsubscribe-alt {
    font-size: 0.9rem;
    color: var(--zt-muted);
}

.unsubscribe-alt a {
    color: var(--zt-black);
    border-bottom: 1px solid var(--zt-lime);
}

.unsubscribe-success,
.unsubscribe-error {
    padding: 24px;
    background: var(--zt-cream);
    border: 1px solid var(--zt-divider);
    border-radius: 2px;
    text-align: left;
    line-height: 1.8;
    color: #555;
}

.unsubscribe-success {
    border-left: 3px solid var(--zt-lime);
}

.unsubscribe-error {
    border-left: 3px solid #c8302a;
}

.unsubscribe-actions {
    margin-top: 20px;
    display: flex;
    gap: 12px;
    justify-content: center;
}

.unsubscribe-actions .btn-lime,
.unsubscribe-actions .btn-ghost {
    padding: 10px 24px;
    font-family: var(--zt-font-mono);
    font-size: 13px;
    font-weight: 600;
}

.contact-inner {
    max-width: 720px;
    margin: 0 auto;
}

.contact-eyebrow {
    font-family: var(--zt-font-mono);
    font-size: 12px;
    color: var(--zt-lime);
    text-transform: uppercase;
    letter-spacing: 0.16em;
    margin-bottom: 24px;
}

.contact-title {
    font-size: 2.8rem;
    font-weight: 700;
    line-height: 1.15;
    letter-spacing: -0.02em;
    margin-bottom: 24px;
}

.contact-support {
    font-size: 1.1rem;
    line-height: 1.6;
    color: var(--zt-cream);
    opacity: 0.7;
    margin-bottom: 40px;
}

.contact-actions {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
}

/* ==========================================================================
   10. 页脚
   ========================================================================== */
.site-footer {
    background: var(--zt-black);
    color: var(--zt-cream);
    padding: 48px 24px;
    border-top: 1px solid rgba(244, 240, 232, 0.08);
}

.footer-inner {
    max-width: var(--zt-max-width);
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    align-items: stretch;
    gap: 32px;
}

.footer-sub {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
    flex-wrap: wrap;
    padding-bottom: 32px;
    border-bottom: 1px solid rgba(244, 240, 232, 0.08);
}

.footer-sub-text {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.footer-sub-text strong {
    font-size: 18px;
    font-weight: 700;
    color: var(--zt-cream);
}

.footer-sub-text span {
    font-size: 14px;
    color: var(--zt-muted);
}

.footer-sub-form {
    display: flex;
    gap: 8px;
    flex: 1;
    max-width: 400px;
}

.footer-sub-form input {
    flex: 1;
    padding: 10px 14px;
    background: rgba(244, 240, 232, 0.06);
    border: 1px solid rgba(244, 240, 232, 0.15);
    border-radius: 2px;
    color: var(--zt-cream);
    font-family: var(--zt-font-sans);
    font-size: 14px;
    outline: none;
    transition: border-color 0.15s ease;
}

.footer-sub-form input::placeholder {
    color: #666;
}

.footer-sub-form input:focus {
    border-color: var(--zt-lime);
}

.footer-sub-form .btn-lime {
    padding: 10px 24px;
    font-family: var(--zt-font-mono);
    font-size: 13px;
    font-weight: 600;
    border: none;
    cursor: pointer;
    white-space: nowrap;
}

.footer-meta {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    flex-wrap: wrap;
    font-size: 13px;
    color: #666;
}

.footer-brand {
    font-size: 16px;
    font-weight: 700;
    color: var(--zt-cream);
    letter-spacing: -0.01em;
}

.footer-links {
    display: flex;
    gap: 32px;
    flex-wrap: wrap;
}

.footer-links a {
    font-family: var(--zt-font-mono);
    font-size: 12px;
    color: var(--zt-muted);
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.footer-links a:hover {
    color: var(--zt-lime);
}

.footer-copy {
    font-family: var(--zt-font-mono);
    font-size: 11px;
    color: var(--zt-muted);
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

/* ==========================================================================
   11. 研究列表页
   ========================================================================== */
.research-page {
    padding: 80px 24px 120px;
    background: var(--zt-cream);
}

.research-inner {
    max-width: var(--zt-max-width);
    margin: 0 auto;
}

.research-hero {
    margin-bottom: 64px;
    padding-bottom: 32px;
    border-bottom: 2px solid var(--zt-black);
}

.research-hero .page-eyebrow {
    font-family: var(--zt-font-mono);
    font-size: 12px;
    color: var(--zt-muted);
    text-transform: uppercase;
    letter-spacing: 0.12em;
    margin-bottom: 16px;
    display: block;
}

.research-hero h1 {
    font-size: clamp(2rem, 5vw, 3.2rem);
    font-weight: 700;
    line-height: 1.1;
    letter-spacing: -0.02em;
    margin-bottom: 16px;
}

.research-hero .research-intro {
    font-size: 1.1rem;
    line-height: 1.6;
    color: var(--zt-muted);
    max-width: 640px;
}

.research-filter {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 48px;
}

.filter-tag {
    display: inline-flex;
    align-items: center;
    padding: 8px 16px;
    font-family: var(--zt-font-sans);
    font-size: 13px;
    font-weight: 500;
    color: var(--zt-black);
    background: var(--zt-white);
    border: 1px solid var(--zt-divider);
    border-radius: var(--zt-radius);
    transition: all 0.15s ease;
    white-space: nowrap;
}

.filter-tag:hover {
    border-color: var(--zt-black);
}

.filter-tag.active {
    background: var(--zt-black);
    color: var(--zt-lime);
    border-color: var(--zt-black);
}

.research-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 32px;
}

.research-card {
    display: flex;
    flex-direction: column;
    background: var(--zt-white);
    border: var(--zt-border);
    border-radius: var(--zt-radius);
    padding: 32px;
    box-shadow: var(--zt-shadow);
    transition: all 0.2s ease;
}

.research-card:hover {
    border-color: var(--zt-black);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(14, 14, 14, 0.08);
}

.research-card-cat {
    font-family: var(--zt-font-mono);
    font-size: 11px;
    color: var(--zt-muted);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: 16px;
}

.research-card-title {
    font-size: 1.4rem;
    font-weight: 600;
    line-height: 1.3;
    color: var(--zt-black);
    margin-bottom: 12px;
    letter-spacing: -0.01em;
}

.research-card-excerpt {
    font-size: 0.95rem;
    line-height: 1.6;
    color: var(--zt-muted);
    margin-bottom: 24px;
    flex: 1;
}

.research-card-meta {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    padding-top: 16px;
    border-top: var(--zt-border);
}

.research-card-date {
    font-family: var(--zt-font-mono);
    font-size: 12px;
    color: var(--zt-muted);
    text-transform: uppercase;
    letter-spacing: 0.08em;
}

.research-card-link {
    font-family: var(--zt-font-mono);
    font-size: 12px;
    color: var(--zt-black);
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.research-card:hover .research-card-link {
    color: var(--zt-lime);
}

/* ==========================================================================
   12. 研究详情页
   ========================================================================== */
.research-detail {
    padding: 80px 24px 120px;
    background: var(--zt-cream);
}

.research-detail-inner {
    max-width: 720px;
    margin: 0 auto;
}

.research-detail-cats {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 32px;
}

.research-cat-tag {
    display: inline-flex;
    align-items: center;
    padding: 6px 12px;
    font-family: var(--zt-font-mono);
    font-size: 11px;
    color: var(--zt-cream);
    background: var(--zt-black);
    border-radius: var(--zt-radius);
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.research-detail-title {
    font-size: 2.6rem;
    font-weight: 700;
    line-height: 1.15;
    letter-spacing: -0.02em;
    color: var(--zt-black);
    margin-bottom: 24px;
}

.research-detail-meta {
    display: flex;
    align-items: center;
    gap: 24px;
    flex-wrap: wrap;
    padding-bottom: 32px;
    margin-bottom: 40px;
    border-bottom: var(--zt-border);
    font-family: var(--zt-font-mono);
    font-size: 12px;
    color: var(--zt-muted);
    text-transform: uppercase;
    letter-spacing: 0.08em;
}

.research-detail-meta .meta-author {
    color: var(--zt-black);
}

.research-detail-body {
    font-size: 1.05rem;
    line-height: 1.75;
    color: var(--zt-black);
}

.research-detail-body p {
    margin-bottom: 24px;
}

.research-detail-body h2 {
    font-size: 1.8rem;
    font-weight: 600;
    line-height: 1.25;
    letter-spacing: -0.01em;
    margin: 48px 0 20px;
    color: var(--zt-black);
}

.research-detail-body h3 {
    font-size: 1.35rem;
    font-weight: 600;
    line-height: 1.3;
    margin: 36px 0 16px;
    color: var(--zt-black);
}

.research-detail-body ul,
.research-detail-body ol {
    margin: 0 0 24px;
    padding-left: 24px;
}

.research-detail-body ul li,
.research-detail-body ol li {
    list-style: disc;
    margin-bottom: 8px;
    line-height: 1.7;
}

.research-detail-body ol li {
    list-style: decimal;
}

.research-detail-body blockquote {
    margin: 32px 0;
    padding: 16px 24px;
    border-left: 3px solid var(--zt-lime);
    background: var(--zt-white);
    font-size: 1.15rem;
    font-style: italic;
    color: var(--zt-black);
    border-radius: 0 var(--zt-radius) var(--zt-radius) 0;
}

.research-detail-body code {
    font-family: var(--zt-font-mono);
    font-size: 0.9em;
    padding: 2px 6px;
    background: var(--zt-white);
    border: 1px solid var(--zt-divider);
    border-radius: var(--zt-radius);
    color: var(--zt-black);
}

.research-detail-body pre {
    margin: 24px 0;
    padding: 20px;
    background: var(--zt-black);
    color: var(--zt-cream);
    border-radius: var(--zt-radius);
    overflow-x: auto;
    font-size: 0.9rem;
    line-height: 1.6;
}

.research-detail-body pre code {
    background: transparent;
    border: none;
    padding: 0;
    color: inherit;
}

.research-detail-body a {
    color: var(--zt-black);
    border-bottom: 1px solid var(--zt-lime);
    padding-bottom: 1px;
}

.research-detail-body a:hover {
    color: var(--zt-lime);
}

.research-detail-body img {
    margin: 32px 0;
    border-radius: var(--zt-radius);
    border: var(--zt-border);
}

.research-detail-footer {
    margin-top: 48px;
    padding-top: 32px;
    border-top: 2px solid var(--zt-black);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    flex-wrap: wrap;
}

.research-back {
    font-family: var(--zt-font-mono);
    font-size: 12px;
    color: var(--zt-black);
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.research-back:hover {
    color: var(--zt-lime);
}

/* ----- 相关研究 ----- */
.related-research {
    margin-top: 80px;
    padding-top: 48px;
    border-top: 2px solid var(--zt-black);
}

.related-research h3 {
    font-family: var(--zt-font-mono);
    font-size: 12px;
    color: var(--zt-muted);
    text-transform: uppercase;
    letter-spacing: 0.12em;
    margin-bottom: 32px;
}

.related-item {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 24px;
    padding: 24px 0;
    border-top: var(--zt-border);
    transition: transform 0.2s ease;
}

.related-item:last-child {
    border-bottom: var(--zt-border);
}

.related-item:hover {
    transform: translateX(8px);
}

.related-item-title {
    font-size: 1.15rem;
    font-weight: 500;
    line-height: 1.4;
    color: var(--zt-black);
    letter-spacing: -0.01em;
}

.related-item:hover .related-item-title {
    color: var(--zt-lime);
}

.related-item-date {
    flex: 0 0 auto;
    font-family: var(--zt-font-mono);
    font-size: 12px;
    color: var(--zt-muted);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    padding-top: 4px;
}

/* ==========================================================================
   13. 独立页面
   ========================================================================== */
.page-container {
    max-width: 720px;
    margin: 0 auto;
    padding: 80px 24px 120px;
}

.page-eyebrow {
    font-family: var(--zt-font-mono);
    font-size: 12px;
    color: var(--zt-muted);
    text-transform: uppercase;
    letter-spacing: 0.12em;
    margin-bottom: 16px;
    display: block;
}

.page-title {
    font-size: 2.2rem;
    font-weight: 700;
    line-height: 1.2;
    letter-spacing: -0.02em;
    color: var(--zt-black);
    margin-bottom: 40px;
    padding-bottom: 24px;
    border-bottom: 2px solid var(--zt-black);
}

.page-content {
    font-size: 1.05rem;
    line-height: 1.75;
    color: var(--zt-black);
}

.page-content p {
    margin-bottom: 24px;
}

.page-content h2 {
    font-size: 1.6rem;
    font-weight: 600;
    line-height: 1.25;
    letter-spacing: -0.01em;
    margin: 48px 0 20px;
    color: var(--zt-black);
}

.page-content h3 {
    font-size: 1.3rem;
    font-weight: 600;
    line-height: 1.3;
    margin: 36px 0 16px;
    color: var(--zt-black);
}

.page-content ul,
.page-content ol {
    margin: 0 0 24px;
    padding-left: 24px;
}

.page-content ul li,
.page-content ol li {
    list-style: disc;
    margin-bottom: 8px;
    line-height: 1.7;
}

.page-content ol li {
    list-style: decimal;
}

.page-content a {
    color: var(--zt-black);
    border-bottom: 1px solid var(--zt-lime);
    padding-bottom: 1px;
}

.page-content a:hover {
    color: var(--zt-lime);
}

.page-content blockquote {
    margin: 32px 0;
    padding: 16px 24px;
    border-left: 3px solid var(--zt-lime);
    background: var(--zt-white);
    font-size: 1.15rem;
    font-style: italic;
    border-radius: 0 var(--zt-radius) var(--zt-radius) 0;
}

.page-content code {
    font-family: var(--zt-font-mono);
    font-size: 0.9em;
    padding: 2px 6px;
    background: var(--zt-white);
    border: 1px solid var(--zt-divider);
    border-radius: var(--zt-radius);
}

.page-content pre {
    margin: 24px 0;
    padding: 20px;
    background: var(--zt-black);
    color: var(--zt-cream);
    border-radius: var(--zt-radius);
    overflow-x: auto;
    font-size: 0.9rem;
    line-height: 1.6;
}

.page-content pre code {
    background: transparent;
    border: none;
    padding: 0;
    color: inherit;
}

.page-content hr {
    margin: 48px 0;
    border: none;
    border-top: var(--zt-border);
}

/* ==========================================================================
   14. 404 页面
   ========================================================================== */
.not-found {
    min-height: 70vh;
    background: var(--zt-cream);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 80px 24px;
    text-align: center;
}

.not-found-inner {
    max-width: 560px;
    margin: 0 auto;
}

.not-found-code {
    font-family: var(--zt-font-mono);
    font-size: clamp(4rem, 14vw, 9rem);
    font-weight: 700;
    line-height: 1;
    color: var(--zt-black);
    letter-spacing: -0.04em;
    margin-bottom: 16px;
}

.not-found-code .lime {
    color: var(--zt-lime);
}

.not-found-title {
    font-size: 1.6rem;
    font-weight: 600;
    color: var(--zt-black);
    margin-bottom: 16px;
    letter-spacing: -0.01em;
}

.not-found-text {
    font-size: 1rem;
    line-height: 1.7;
    color: var(--zt-muted);
    margin-bottom: 32px;
}

.not-found-actions {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
}

/* ==========================================================================
   15. 返回顶部按钮
   ========================================================================== */
.back-to-top {
    position: fixed;
    right: 24px;
    bottom: 24px;
    z-index: 90;
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--zt-black);
    color: var(--zt-lime);
    border: 1px solid var(--zt-black);
    border-radius: var(--zt-radius);
    font-size: 18px;
    line-height: 1;
    opacity: 0;
    visibility: hidden;
    transform: translateY(8px);
    transition: all 0.2s ease;
}

.back-to-top.is-visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.back-to-top:hover {
    background: var(--zt-lime);
    color: var(--zt-black);
    border-color: var(--zt-lime);
}

/* ==========================================================================
   16. 文章访问控制（注册墙）
   ========================================================================== */
.article-lock {
    margin: 40px 0;
    padding: 40px 32px;
    background: var(--zt-white);
    border: 1px solid var(--zt-divider);
    border-top: 3px solid var(--zt-lime);
    border-radius: var(--zt-radius);
    text-align: center;
}

.article-lock-icon {
    font-family: var(--zt-font-mono);
    font-size: 12px;
    color: var(--zt-lime);
    text-transform: uppercase;
    letter-spacing: 0.16em;
    margin-bottom: 16px;
}

.article-lock-title {
    font-size: 1.4rem;
    font-weight: 600;
    color: var(--zt-black);
    margin-bottom: 12px;
    letter-spacing: -0.01em;
}

.article-lock-text {
    font-size: 0.95rem;
    line-height: 1.6;
    color: var(--zt-muted);
    margin-bottom: 24px;
    max-width: 480px;
    margin-left: auto;
    margin-right: auto;
}

.article-lock-actions {
    display: flex;
    gap: 12px;
    justify-content: center;
    flex-wrap: wrap;
}

.article-lock .btn-lime {
    padding: 12px 24px;
    font-size: 13px;
}

.article-lock .btn-ghost {
    padding: 12px 24px;
    font-size: 13px;
    color: var(--zt-black);
    border-color: var(--zt-black);
}

.article-lock .btn-ghost:hover {
    background: var(--zt-black);
    color: var(--zt-cream);
}

/* ==========================================================================
   17. 通用区块与工具类
   ========================================================================== */
.section-tag {
    font-family: var(--zt-font-mono);
    font-size: 12px;
    color: var(--zt-muted);
    text-transform: uppercase;
    letter-spacing: 0.12em;
}

.container {
    max-width: var(--zt-max-width);
    margin: 0 auto;
    padding: 0 24px;
}

.text-lime {
    color: var(--zt-lime);
}

.text-muted {
    color: var(--zt-muted);
}

/* ----- 分页（研究列表用） ----- */
.pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 4px;
    margin-top: 64px;
    padding-top: 32px;
}

.pagination a,
.pagination span {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 36px;
    height: 36px;
    padding: 0 12px;
    font-family: var(--zt-font-mono);
    font-size: 13px;
    color: var(--zt-black);
    background: var(--zt-white);
    border: 1px solid var(--zt-divider);
    border-radius: var(--zt-radius);
    transition: all 0.15s ease;
}

.pagination a:hover {
    border-color: var(--zt-black);
    background: var(--zt-cream);
}

.pagination .active {
    background: var(--zt-black);
    color: var(--zt-lime);
    border-color: var(--zt-black);
    font-weight: 600;
}

.pagination .disabled {
    color: var(--zt-muted);
    opacity: 0.5;
    cursor: not-allowed;
}

/* ==========================================================================
   18. 响应式（768px 以下单列，汉堡菜单）
   ========================================================================== */
@media (max-width: 768px) {
    .header-inner {
        height: auto;
        padding: 12px 16px;
        flex-wrap: wrap;
        gap: 12px;
    }

    .nav-toggle {
        display: flex;
    }

    .nav-menu {
        order: 3;
        flex: 0 0 100%;
        flex-direction: column;
        align-items: flex-start;
        gap: 0;
        width: 100%;
        max-height: 0;
        overflow: hidden;
        transition: max-height 0.25s ease;
    }

    .nav-menu.is-open {
        max-height: 360px;
    }

    .nav-menu a {
        display: block;
        width: 100%;
        padding: 12px 0;
        font-size: 14px;
        border-bottom: 1px solid var(--zt-divider);
    }

    .nav-menu a:last-child {
        border-bottom: none;
    }

    /* Hero */
    .manifesto {
        padding: 64px 16px;
        min-height: 60vh;
    }

    .manifesto-actions {
        flex-direction: column;
        align-items: stretch;
    }

    .btn-lime,
    .btn-ghost {
        width: 100%;
    }

    /* Belief */
    .belief {
        padding: 64px 16px;
    }

    .belief-inner {
        grid-template-columns: 1fr;
        gap: 24px;
    }

    /* Stories */
    .stories {
        padding: 64px 16px;
    }

    .story {
        grid-template-columns: 1fr;
        gap: 16px;
        padding: 32px 0;
    }

    /* Method */
    .method {
        padding: 64px 16px;
    }

    .method-list {
        grid-template-columns: 1fr;
    }

    .method-item:nth-child(odd),
    .method-item:nth-child(even) {
        padding: 32px 0;
        border-right: none;
    }

    .method-item:last-child {
        border-bottom: 2px solid var(--zt-black);
    }

    /* Team */
    .team {
        padding: 64px 16px;
    }

    .team-inner {
        grid-template-columns: 1fr;
        gap: 24px;
    }

    .team-quote {
        font-size: 1.35rem;
        padding-left: 24px;
    }

    /* Insights */
    .insights {
        padding: 64px 16px;
    }

    .insight-item {
        flex-wrap: wrap;
        gap: 8px;
    }

    .insight-meta {
        width: 100%;
    }

    .insight-item:hover {
        transform: none;
    }

    /* Contact */
    .contact {
        padding: 64px 16px;
    }

    .contact-title {
        font-size: 2rem;
    }

    .contact-actions {
        flex-direction: column;
        align-items: stretch;
    }

    /* Footer */
    .footer-inner {
        flex-direction: column;
        align-items: flex-start;
        gap: 16px;
    }

    /* Research list */
    .research-page {
        padding: 48px 16px 80px;
    }

    .research-grid {
        grid-template-columns: 1fr;
        gap: 16px;
    }

    .research-card {
        padding: 24px;
    }

    /* Research detail */
    .research-detail {
        padding: 48px 16px 80px;
    }

    .research-detail-title {
        font-size: 1.8rem;
    }

    .related-item:hover {
        transform: none;
    }

    /* Page */
    .page-container {
        padding: 48px 16px 80px;
    }

    .page-title {
        font-size: 1.7rem;
    }

    /* 404 */
    .not-found {
        padding: 48px 16px;
        min-height: 50vh;
    }

    .not-found-actions {
        flex-direction: column;
        align-items: stretch;
    }

    /* Back to top */
    .back-to-top {
        right: 16px;
        bottom: 16px;
        width: 40px;
        height: 40px;
    }

    /* Article lock */
    .article-lock {
        padding: 32px 20px;
    }

    .article-lock-actions {
        flex-direction: column;
        align-items: stretch;
    }
}

/* ==========================================================================
   19. 小屏微调（480px 以下）
   ========================================================================== */
@media (max-width: 480px) {
    .manifesto-eyebrow {
        font-size: 11px;
        padding: 5px 10px;
    }

    .manifesto-support {
        font-size: 1.05rem;
    }

    .belief-body {
        font-size: 1.2rem;
    }

    .story-client {
        font-size: 1.2rem;
    }

    .method-name {
        font-size: 1.4rem;
    }

    .research-card-title {
        font-size: 1.2rem;
    }

    .research-detail-title {
        font-size: 1.6rem;
    }
}

/* ==========================================================================
   18. 补全缺失样式（类名对齐）
   ========================================================================== */

/* 文章详情容器 */
.container-narrow {
    max-width: 720px;
    margin: 0 auto;
}

/* 文章摘要 */
.research-detail-summary {
    font-size: 1.15rem;
    line-height: 1.7;
    color: var(--zt-muted);
    margin-bottom: 40px;
    padding-bottom: 32px;
    border-bottom: var(--zt-border);
    font-weight: 500;
}

/* 注册墙补充 */
.article-lock h3 {
    font-size: 1.4rem;
    font-weight: 600;
    color: var(--zt-black);
    margin-bottom: 12px;
    letter-spacing: -0.01em;
}

.article-lock p {
    font-size: 0.95rem;
    line-height: 1.6;
    color: var(--zt-muted);
    margin-bottom: 24px;
    max-width: 480px;
    margin-left: auto;
    margin-right: auto;
}

.article-lock form {
    display: flex;
    flex-direction: column;
    gap: 12px;
    max-width: 360px;
    margin: 0 auto 16px;
}

.article-lock form input[type="text"],
.article-lock form input[type="email"] {
    width: 100%;
    padding: 12px 14px;
    border: 1px solid var(--zt-divider);
    background: var(--zt-cream);
    font-family: var(--zt-font-sans);
    font-size: 14px;
    border-radius: var(--zt-radius);
    outline: none;
    transition: border-color 0.2s;
}

.article-lock form input:focus {
    border-color: var(--zt-black);
}

.article-lock form button {
    width: 100%;
    padding: 12px;
    background: var(--zt-lime);
    border: none;
    font-family: var(--zt-font-sans);
    font-size: 14px;
    font-weight: 600;
    color: var(--zt-black);
    cursor: pointer;
    border-radius: var(--zt-radius);
    transition: background 0.2s;
}

.article-lock form button:hover {
    background: #a8dd00;
}

.lock-alt {
    font-size: 13px;
    color: var(--zt-muted);
}

.lock-alt a {
    color: var(--zt-black);
    text-decoration: underline;
    text-decoration-color: var(--zt-lime);
    text-underline-offset: 2px;
}

/* 相关研究补充 */
.related-label {
    font-family: var(--zt-font-mono);
    font-size: 12px;
    color: var(--zt-muted);
    text-transform: uppercase;
    letter-spacing: 0.12em;
    margin-bottom: 24px;
}

.related-list {
    display: flex;
    flex-direction: column;
}

.related-list .related-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    padding: 20px 0;
    border-top: 1px solid var(--zt-divider);
    transition: padding 0.2s ease;
}

.related-list .related-item:last-child {
    border-bottom: 1px solid var(--zt-divider);
}

.related-list .related-item:hover {
    padding-left: 8px;
}

.related-title {
    font-size: 1.1rem;
    font-weight: 500;
    line-height: 1.4;
    color: var(--zt-black);
}

.related-list .related-item:hover .related-title {
    color: #a8dd00;
}

.related-arrow {
    flex-shrink: 0;
    font-family: var(--zt-font-mono);
    font-size: 14px;
    color: var(--zt-muted);
    transition: color 0.2s;
}

.related-list .related-item:hover .related-arrow {
    color: var(--zt-lime);
}

/* 认证页面（注册用户登录） */
.auth-page {
    min-height: 60vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 80px 24px;
}

.auth-card {
    width: 100%;
    max-width: 400px;
    background: var(--zt-white);
    border: 1px solid var(--zt-divider);
    border-radius: var(--zt-radius);
    padding: 48px 40px;
}

.auth-title {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--zt-black);
    margin-bottom: 8px;
    letter-spacing: -0.02em;
}

.auth-sub {
    font-size: 0.9rem;
    color: var(--zt-muted);
    margin-bottom: 32px;
    line-height: 1.5;
}

.auth-card form {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.auth-card input[type="email"],
.auth-card input[type="text"],
.auth-card input[type="password"] {
    width: 100%;
    padding: 12px 14px;
    border: 1px solid var(--zt-divider);
    background: var(--zt-cream);
    font-family: var(--zt-font-sans);
    font-size: 14px;
    border-radius: var(--zt-radius);
    outline: none;
    transition: border-color 0.2s;
}

.auth-card input:focus {
    border-color: var(--zt-black);
}

.auth-card .btn-lime {
    width: 100%;
    padding: 12px;
    background: var(--zt-lime);
    border: none;
    font-family: var(--zt-font-sans);
    font-size: 14px;
    font-weight: 600;
    color: var(--zt-black);
    cursor: pointer;
    border-radius: var(--zt-radius);
    transition: background 0.2s;
}

.auth-card .btn-lime:hover {
    background: #a8dd00;
}

.btn-block {
    width: 100%;
}

.auth-alt {
    font-size: 13px;
    color: var(--zt-muted);
    margin-top: 16px;
    text-align: center;
    line-height: 1.5;
}

.auth-back {
    display: block;
    text-align: center;
    margin-top: 20px;
    font-family: var(--zt-font-mono);
    font-size: 12px;
    color: var(--zt-muted);
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.auth-back:hover {
    color: var(--zt-lime);
}

/* 消息提示 */
.alert {
    padding: 14px 18px;
    border-radius: var(--zt-radius);
    font-size: 14px;
    margin-bottom: 20px;
    line-height: 1.5;
}

.alert.success {
    background: var(--zt-lime);
    color: var(--zt-black);
}

.alert.error {
    background: #ff5252;
    color: var(--zt-white);
}

/* 联系表单 */
.contact-form-wrap {
    margin-top: 48px;
    padding-top: 40px;
    border-top: 2px solid var(--zt-black);
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 16px;
    max-width: 600px;
}

.contact-form .form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
}

.contact-form input[type="text"],
.contact-form input[type="email"],
.contact-form input[type="tel"],
.contact-form textarea {
    width: 100%;
    padding: 12px 14px;
    border: 1px solid var(--zt-divider);
    background: var(--zt-white);
    font-family: var(--zt-font-sans);
    font-size: 14px;
    border-radius: var(--zt-radius);
    outline: none;
    transition: border-color 0.2s;
}

.contact-form input:focus,
.contact-form textarea:focus {
    border-color: var(--zt-black);
}

.contact-form textarea {
    min-height: 120px;
    resize: vertical;
}

.contact-form button {
    align-self: flex-start;
    padding: 12px 28px;
    background: var(--zt-lime);
    border: none;
    font-family: var(--zt-font-sans);
    font-size: 14px;
    font-weight: 600;
    color: var(--zt-black);
    cursor: pointer;
    border-radius: var(--zt-radius);
    transition: background 0.2s;
}

.contact-form button:hover {
    background: #a8dd00;
}

/* 按钮基础 */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 10px 24px;
    font-family: var(--zt-font-sans);
    font-size: 14px;
    font-weight: 600;
    border: 1px solid var(--zt-black);
    border-radius: var(--zt-radius);
    cursor: pointer;
    transition: all 0.2s;
    text-decoration: none;
}

.btn-lime {
    background: var(--zt-lime);
    border-color: var(--zt-lime);
    color: var(--zt-black);
}

.btn-lime:hover {
    background: #a8dd00;
    border-color: #a8dd00;
}

/* 响应式补充 */
@media (max-width: 640px) {
    .contact-form .form-row {
        grid-template-columns: 1fr;
    }
    .research-detail-title {
        font-size: 1.8rem;
    }
    .research-detail {
        padding: 48px 20px 80px;
    }
    .auth-card {
        padding: 32px 24px;
    }
}

/* 关键观点 */
.key-takeaways {
    margin: 32px 0 40px; padding: 24px 28px;
    background: var(--zt-white); border: 1px solid var(--zt-divider);
    border-left: 3px solid var(--zt-lime); border-radius: 2px;
}
.takeaways-label {
    font-family: var(--zt-font-mono); font-size: 11px; color: var(--zt-muted);
    text-transform: uppercase; letter-spacing: 0.12em; margin-bottom: 12px;
}
.takeaways-list { list-style: none; padding: 0; }
.takeaways-list li {
    position: relative; padding-left: 20px; margin-bottom: 10px;
    font-size: 1rem; line-height: 1.6; color: var(--zt-black); font-weight: 500;
}
.takeaways-list li:last-child { margin-bottom: 0; }
.takeaways-list li::before {
    content: ''; position: absolute; left: 0; top: 9px;
    width: 8px; height: 8px; background: var(--zt-lime); border-radius: 1px;
}

/* PDF 附件 */
.article-attachment {
    margin: 40px 0; padding: 24px; text-align: center;
    background: var(--zt-white); border: 1px solid var(--zt-divider); border-radius: 2px;
}
.article-attachment .btn { padding: 12px 28px; }