:root{color-scheme:dark;--ocean-900:#0a1628;--ocean-800:#0f2744;--ocean-700:#15335c;--ocean-600:#1a4478;--cyan-400:#22d3ee;--cyan-300:#67e8f9;--cyan-200:#a5f3fc;--text:#fff;--gray-300:#d1d5db;--gray-400:#9ca3af;--gray-500:#6b7280;--line:#1d3e61;--max:1280px}
*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:80px}html.menu-open{overflow:hidden}body{margin:0;background:var(--ocean-900);color:var(--text);font-family:Inter,"Noto Sans SC","PingFang SC","Microsoft YaHei",Arial,sans-serif;line-height:1.65;-webkit-font-smoothing:antialiased}a{color:inherit;text-decoration:none}img,svg{display:block;max-width:100%}button{font:inherit}h1,h2,h3,p{margin:0}.skip-link{position:fixed;left:18px;top:-100px;z-index:100;background:var(--cyan-400);color:var(--ocean-900);padding:10px 16px;border-radius:4px}.skip-link:focus{top:15px}a:focus-visible,button:focus-visible,summary:focus-visible,[tabindex]:focus-visible{outline:2px solid var(--cyan-300);outline-offset:4px}.section-wrap{width:min(var(--max),calc(100% - 48px));margin:0 auto}.narrow-wrap{width:min(820px,calc(100% - 48px));margin:0 auto}.wrap{width:min(960px,calc(100% - 48px));margin:0 auto}

.site-navbar{position:fixed;inset:0 0 auto;z-index:50;height:80px;transition:background .25s,box-shadow .25s;border-bottom:1px solid transparent}.site-navbar.is-scrolled{background:rgba(10,22,40,.94);backdrop-filter:blur(14px);border-color:rgba(34,211,238,.1);box-shadow:0 12px 30px rgba(0,0,0,.18)}.nav-inner{width:min(var(--max),calc(100% - 48px));height:100%;margin:auto;display:flex;align-items:center;justify-content:space-between;gap:35px}.nav-brand,.footer-brand{display:inline-flex;align-items:center;gap:11px;font-size:23px;font-weight:800;background:linear-gradient(90deg,var(--cyan-400),var(--cyan-200));-webkit-background-clip:text;background-clip:text;color:transparent}.brand-icon{width:31px;height:31px;display:grid;place-items:center;color:var(--cyan-400);background:rgba(34,211,238,.1);border:1px solid rgba(34,211,238,.28);border-radius:50%;font-family:Georgia,serif;font-size:19px}.desktop-nav{display:flex;align-items:center;gap:30px;color:var(--gray-300);font-size:14px}.desktop-nav>a:not(.btn-primary):hover{color:var(--cyan-400)}.btn-primary,.btn-outline{display:inline-flex;align-items:center;justify-content:center;gap:9px;border-radius:8px;padding:11px 20px;font-weight:700;line-height:1.35;transition:transform .2s,background .2s,border-color .2s;color:var(--text)}.btn-primary{background:linear-gradient(135deg,var(--cyan-400),#0891b2);box-shadow:0 8px 22px rgba(34,211,238,.16)}.btn-primary:hover,.btn-outline:hover{transform:translateY(-2px)}.btn-primary:hover{background:linear-gradient(135deg,var(--cyan-300),var(--cyan-400))}.btn-outline{border:1px solid rgba(34,211,238,.56);background:rgba(10,22,40,.28)}.btn-outline:hover{border-color:var(--cyan-300);background:rgba(34,211,238,.08)}.nav-cta{padding:10px 20px}.mobile-toggle{display:none;width:44px;height:44px;border:0;background:transparent;padding:9px}.mobile-toggle span{height:2px;background:#fff;display:block;margin:6px 0;border-radius:2px}.mobile-overlay{position:fixed;inset:0;z-index:80;background:rgba(7,18,33,.98);backdrop-filter:blur(16px)}.mobile-overlay[hidden]{display:none}.mobile-overlay nav{height:100%;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:27px;font-size:24px}.mobile-overlay nav>a:hover{color:var(--cyan-400)}.mobile-overlay .btn-primary{font-size:17px}.mobile-close{position:absolute;right:28px;top:20px;border:0;background:transparent;color:#fff;font-size:40px;line-height:1;padding:10px}

.landing-hero{position:relative;min-height:100vh;display:flex;align-items:center;overflow:hidden;padding:110px 0 96px;background:var(--ocean-900)}.hero-pattern,.cta-pattern{position:absolute;inset:0;background-image:radial-gradient(circle at 50% 50%,rgba(34,211,238,.45) 2px,transparent 2px);background-size:40px 40px;opacity:.055}.hero-waves{position:absolute;inset:auto 0 0;height:300px}.hero-waves svg{width:100%;height:100%}.wave-one{fill:rgba(15,39,68,.67)}.wave-two{fill:rgba(34,211,238,.055)}.hero-grid{position:relative;z-index:2;display:grid;grid-template-columns:minmax(0,1fr) minmax(420px,1fr);align-items:center;gap:64px}.hero-badge{width:max-content;max-width:100%;display:inline-flex;align-items:center;gap:9px;color:var(--cyan-400);font-size:14px;font-weight:700;padding:8px 16px;border:1px solid rgba(34,211,238,.3);border-radius:999px;background:rgba(34,211,238,.09)}.hero-copy h1{font-size:clamp(43px,5vw,66px);line-height:1.16;font-weight:850;letter-spacing:-.045em;margin:23px 0}.hero-copy h1 span,.section-title h2 span,.cta-content h2 span{background:linear-gradient(90deg,var(--cyan-400),var(--cyan-200));-webkit-background-clip:text;background-clip:text;color:transparent}.hero-copy>p{max-width:620px;color:var(--gray-400);font-size:19px;line-height:1.85}.hero-actions{display:flex;flex-wrap:wrap;gap:15px;margin-top:29px}.large-button{font-size:17px;padding:15px 29px;border-radius:9px}.hero-points{display:flex;align-items:center;flex-wrap:wrap;gap:24px;margin-top:28px;color:var(--gray-400);font-size:14px}.hero-points span{display:flex;align-items:center;gap:8px}.hero-points i{color:var(--cyan-400);font-style:normal}.hero-media{position:relative}.media-glow{position:absolute;inset:-17px;background:linear-gradient(90deg,rgba(34,211,238,.2),rgba(59,130,246,.18));filter:blur(30px);border-radius:28px}.hero-media img{position:relative;width:100%;aspect-ratio:4/3;object-fit:cover;border-radius:17px;border:1px solid rgba(34,211,238,.22);box-shadow:0 28px 70px rgba(0,0,0,.42)}.media-status{position:absolute;right:-15px;bottom:-15px;display:flex;align-items:center;gap:12px;padding:14px 17px;background:rgba(15,39,68,.92);backdrop-filter:blur(10px);border:1px solid rgba(34,211,238,.3);border-radius:12px;box-shadow:0 16px 35px rgba(0,0,0,.32);font-size:14px;color:var(--gray-300)}.media-status i{width:11px;height:11px;border-radius:50%;background:#4ade80;box-shadow:0 0 0 5px rgba(74,222,128,.12);animation:pulse 1.8s infinite}@keyframes pulse{50%{opacity:.45;transform:scale(.85)}}

.features-section,.content-cards-section{position:relative;background:var(--ocean-800);padding:112px 0 100px}.section-wave{position:absolute;left:0;top:0;width:100%;height:61px;overflow:hidden;line-height:0}.section-wave svg{width:100%;height:61px}.section-wave path{fill:var(--ocean-900)}.section-title{text-align:center;margin:0 auto 55px}.section-title h2{font-size:clamp(31px,3.3vw,44px);line-height:1.25;font-weight:800}.section-title>p{max-width:720px;margin:14px auto 0;color:var(--gray-400);font-size:18px;line-height:1.8}.feature-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:35px}.feature-card,.content-card{background:linear-gradient(145deg,rgba(21,51,92,.68),rgba(10,22,40,.62));border:1px solid rgba(34,211,238,.12);border-radius:15px;padding:31px;box-shadow:0 20px 45px rgba(0,0,0,.12);transition:transform .25s,border-color .25s}.feature-card:hover,.content-card:hover{transform:translateY(-6px);border-color:rgba(34,211,238,.4)}.feature-icon{width:66px;height:66px;display:grid;place-items:center;border-radius:15px;background:rgba(34,211,238,.1);color:var(--cyan-400);font-size:31px;margin-bottom:22px}.feature-card h3{font-size:21px;margin-bottom:11px}.feature-card p{color:var(--gray-400);line-height:1.9}.stats-section{background:var(--ocean-900);padding:91px 0}.stat-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:45px}.stat-item{text-align:center}.stat-item strong{display:block;color:var(--cyan-400);font-size:clamp(37px,4.2vw,54px);line-height:1.2;font-weight:850;letter-spacing:-.04em}.stat-item span{display:block;color:var(--gray-400);font-size:17px;margin-top:7px}

.content-card-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:31px}.content-card{position:relative;display:flex;flex-direction:column;min-height:330px;background:rgba(10,22,40,.54)}.card-marks{color:#facc15;letter-spacing:3px;margin-bottom:18px;font-size:13px}.content-card>p{color:var(--gray-300);font-size:15px;line-height:1.95;flex:1}.card-author{display:flex;align-items:center;gap:12px;margin-top:24px}.avatar{width:49px;height:49px;display:grid;place-items:center;border-radius:50%;background:linear-gradient(135deg,var(--ocean-600),var(--cyan-400));border:2px solid rgba(34,211,238,.45);font-size:13px;font-weight:800}.card-author>div{display:flex;flex-direction:column}.card-author strong{font-size:15px}.card-author span{font-size:12px;color:var(--gray-400)}.card-link{position:absolute;right:30px;bottom:35px;color:var(--cyan-400);font-size:12px}.faq-section{background:var(--ocean-900);padding:105px 0}.faq-list{display:flex;flex-direction:column;gap:14px}.faq-item{border:1px solid rgba(34,211,238,.12);border-radius:11px;background:rgba(15,39,68,.48);overflow:hidden}.faq-question{width:100%;display:flex;align-items:center;justify-content:space-between;gap:24px;padding:21px 24px;border:0;background:transparent;color:#fff;text-align:left;font-size:16px;font-weight:700}.faq-icon{width:29px;height:29px;display:grid;place-items:center;color:var(--cyan-400);transition:transform .2s;font-size:22px}.faq-answer{display:none}.faq-item.is-open .faq-answer{display:block}.faq-item.is-open .faq-icon{transform:rotate(180deg)}.faq-answer p{padding:0 24px 23px;color:var(--gray-400);line-height:1.9}.cta-section{position:relative;overflow:hidden;padding:102px 0;background:linear-gradient(135deg,var(--ocean-700),var(--ocean-800) 50%,var(--ocean-900))}.cta-pattern{opacity:.08;background-size:30px 30px}.cta-content{position:relative;z-index:2;text-align:center}.cta-content .hero-badge{margin:0 auto 28px}.cta-content h2{font-size:clamp(33px,4.4vw,52px);line-height:1.3}.cta-content>p{max-width:650px;margin:20px auto 0;color:var(--gray-400);font-size:18px;line-height:1.85}.cta-buttons{display:flex;flex-wrap:wrap;justify-content:center;gap:15px;margin-top:34px}.cta-content>small{display:block;color:var(--gray-500);margin-top:21px}

.site-footer{background:var(--ocean-900);border-top:1px solid var(--ocean-700);padding:62px 0 0}.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:45px;padding-bottom:46px}.footer-brand{font-size:20px}.footer-grid>div:first-child p{max-width:300px;color:var(--gray-400);font-size:14px;margin-top:15px;line-height:1.8}.footer-grid h2{font-size:16px;margin:0 0 17px}.footer-grid ul{list-style:none;padding:0;margin:0;display:flex;flex-direction:column;gap:9px}.footer-grid li,.footer-grid a{color:var(--gray-400);font-size:14px}.footer-grid a:hover{color:var(--cyan-400)}.plain-list li{display:flex;align-items:center;gap:9px}.mini-icon{color:var(--cyan-400)}.footer-bottom{display:flex;align-items:center;justify-content:space-between;gap:25px;border-top:1px solid var(--ocean-700);padding:25px 0;color:var(--gray-500);font-size:13px}.footer-bottom>span:last-child{display:flex;gap:19px}.footer-bottom a:hover{color:var(--cyan-400)}.back-to-top{position:fixed;right:30px;bottom:30px;z-index:45;width:49px;height:49px;border:0;border-radius:50%;background:var(--cyan-400);color:var(--ocean-900);font-size:22px;font-weight:800;box-shadow:0 12px 30px rgba(0,0,0,.3);opacity:0;visibility:hidden;transform:translateY(12px);transition:.2s}.back-to-top.is-visible{opacity:1;visibility:visible;transform:none}

.article-page{padding-top:128px;padding-bottom:80px}.breadcrumbs{display:flex;gap:12px;flex-wrap:wrap;color:#7891a4;font-size:13px}.breadcrumbs a:hover{color:var(--cyan-400)}.article-header{padding:45px 0 40px;border-bottom:1px solid var(--line)}.eyebrow,.small-label{color:var(--cyan-400);font-size:11px;letter-spacing:.14em;font-weight:700}.article-header h1{font-size:clamp(34px,4vw,48px);line-height:1.45;margin-top:16px}.article-header>p{max-width:760px;color:var(--gray-400);font-size:17px;line-height:1.95;margin-top:15px}.article-meta{display:flex;gap:25px;flex-wrap:wrap;color:#71889b;font-size:12px;margin-top:22px}.article-body{max-width:760px;margin:40px auto 0}.reading-section{margin-bottom:42px;scroll-margin-top:100px}.reading-section h2{font-size:25px;line-height:1.5;margin-bottom:17px}.reading-section h3{font-size:17px;margin-bottom:8px}.reading-section p{color:#a9bbc8;font-size:15px;line-height:2.15;margin-bottom:16px}.section-intro{color:#7f9aab!important}.steps{list-style:none;padding:0;margin:23px 0}.steps li{display:grid;grid-template-columns:40px 1fr;gap:15px;padding:22px 0;border-bottom:1px solid var(--line)}.step-number{color:var(--cyan-400);font-family:Georgia,serif;font-size:22px}.table-scroll{overflow:auto;border:1px solid var(--line);border-radius:7px;margin-top:22px}table{width:100%;border-collapse:collapse;min-width:520px;font-size:13px}caption{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0,0,0,0)}thead{background:#152c3b;color:#c7e5e7}th,td{padding:13px 14px;border-bottom:1px solid var(--line);text-align:left;vertical-align:top}tbody th{color:var(--cyan-400)}td{color:#a6bbc8}tbody tr:last-child>*{border-bottom:0}.related{margin-top:50px;border-top:1px solid var(--line);padding-top:27px}.related h2{font-size:23px;margin:9px 0 13px}.related a{display:flex;justify-content:space-between;gap:20px;padding:14px 0;border-bottom:1px solid var(--line);color:#bad0dc}.related a:hover{color:var(--cyan-400)}.info-page{min-height:70vh}

@media(prefers-reduced-motion:no-preference){.reveal{animation:rise .65s ease both}@keyframes rise{from{opacity:.01;transform:translateY(20px)}to{opacity:1;transform:none}}}
@media(max-width:1024px){.desktop-nav{gap:19px;font-size:13px}.hero-grid{grid-template-columns:1fr 1fr;gap:38px}.hero-copy h1{font-size:48px}.hero-copy>p{font-size:17px}.large-button{font-size:15px;padding:14px 22px}.feature-grid,.content-card-grid{gap:22px}.feature-card,.content-card{padding:25px}.footer-grid{gap:28px}.card-link{position:static;margin-top:13px}}
@media(max-width:820px){.site-navbar{height:68px;background:rgba(10,22,40,.93);border-bottom:1px solid rgba(34,211,238,.1)}.nav-inner{width:calc(100% - 36px)}.nav-brand{font-size:20px}.desktop-nav{display:none}.mobile-toggle{display:block}.landing-hero{min-height:auto;padding:112px 0 95px}.hero-grid{grid-template-columns:1fr;gap:52px}.hero-copy{text-align:left}.hero-copy h1{font-size:46px}.hero-copy>p{font-size:17px}.hero-media{max-width:620px}.media-status{right:12px}.features-section,.content-cards-section{padding:94px 0 75px}.feature-grid,.content-card-grid{grid-template-columns:1fr}.feature-card,.content-card{min-height:0}.stat-grid{grid-template-columns:repeat(2,1fr);gap:48px 25px}.faq-section,.cta-section{padding:82px 0}.footer-grid{grid-template-columns:repeat(2,1fr)}.article-page{padding-top:105px}.article-header{padding-top:35px}}
@media(max-width:520px){.section-wrap,.narrow-wrap,.wrap{width:calc(100% - 32px)}.nav-inner{width:calc(100% - 30px)}.nav-brand{font-size:18px}.brand-icon{width:28px;height:28px;font-size:16px}.landing-hero{padding:96px 0 76px}.hero-copy h1{font-size:38px;line-height:1.22}.hero-copy>p{font-size:15px}.hero-badge{font-size:12px;padding:7px 13px}.hero-actions{flex-direction:column;align-items:stretch}.hero-actions .large-button{width:100%}.hero-points{gap:14px 18px;font-size:12px}.hero-media img{border-radius:12px}.media-status{position:relative;right:auto;bottom:auto;margin:-18px 13px 0;justify-content:center}.section-title{margin-bottom:37px}.section-title h2{font-size:29px}.section-title>p{font-size:15px}.feature-card,.content-card{padding:23px}.stats-section{padding:67px 0}.stat-item strong{font-size:34px}.stat-item span{font-size:14px}.faq-question{padding:18px;font-size:14px}.faq-answer p{padding:0 18px 20px;font-size:14px}.cta-content>p{font-size:15px}.cta-buttons{flex-direction:column}.cta-buttons .large-button{width:100%}.footer-grid{grid-template-columns:1fr}.footer-bottom{flex-direction:column;align-items:flex-start}.footer-bottom>span:last-child{flex-wrap:wrap}.back-to-top{right:18px;bottom:18px;width:44px;height:44px}.article-header h1{font-size:30px}.article-header>p{font-size:15px}.article-body{margin-top:30px}.reading-section h2{font-size:22px}.reading-section p{font-size:14px}.article-meta{gap:8px 18px}}
@media print{.site-navbar,.mobile-overlay,.back-to-top,.hero-actions,.cta-section,.site-footer{display:none!important}.landing-hero{min-height:0;padding:30px 0}.hero-grid{display:block}.hero-media{display:none}.features-section,.content-cards-section,.stats-section,.faq-section{padding:35px 0;background:white}.section-wave,.hero-waves,.hero-pattern{display:none}body{background:white;color:#111}.feature-card,.content-card,.faq-item{background:white;color:#111;border-color:#aaa}.feature-card p,.content-card p,.faq-answer p,.section-title p,.stat-item span{color:#333}.article-page{padding-top:25px}.reading-section p{color:#222}}

/* 平面化视觉：减少渐变、玻璃感与悬浮特效 */
.nav-brand,.footer-brand{background:none;-webkit-background-clip:initial;background-clip:initial;color:#fff}
.brand-icon{border-radius:6px;background:#102f4b;border-color:#27506f}
.site-navbar.is-scrolled{background:#0a1628;backdrop-filter:none;box-shadow:none;border-color:#203b55}
.btn-primary{background:#13a9bd;box-shadow:none}
.btn-primary:hover{background:#20b8cb;transform:none}
.btn-outline{background:transparent;border-color:#3b617b}
.btn-outline:hover{background:#102b45;border-color:#4d7894;transform:none}
.hero-pattern,.cta-pattern{opacity:.025}
.hero-badge{border-radius:4px;background:transparent;border-color:#31536d;padding:7px 12px}
.hero-copy h1 span,.section-title h2 span,.cta-content h2 span{background:none;-webkit-background-clip:initial;background-clip:initial;color:#34c6d7}
.media-glow{display:none}
.hero-media img{border-radius:8px;border-color:#31536d;box-shadow:0 20px 46px rgba(0,0,0,.28)}
.media-status{background:#102942;backdrop-filter:none;border-color:#31536d;border-radius:6px;box-shadow:none}
.media-status i{box-shadow:none;animation:none}
.feature-card,.content-card{background:#102842;border-color:#284761;border-radius:7px;box-shadow:none;transition:border-color .18s}
.feature-card:hover,.content-card:hover{transform:none;border-color:#3f6b88}
.feature-icon{width:50px;height:40px;border-radius:5px;background:transparent;border:1px solid #31536d;font-size:15px;font-weight:800;letter-spacing:.08em}
.stat-item strong{font-size:clamp(32px,3.4vw,44px);letter-spacing:-.02em}
.content-card{background:#0d2138;min-height:300px}
.card-marks{color:#42c5d4;letter-spacing:.08em}
.avatar{border-radius:6px;background:#143754;border:1px solid #31536d;font-family:Georgia,serif;font-size:19px}
.faq-item{border-radius:6px;background:#102842;border-color:#284761}
.cta-section{background:#102842;border-top:1px solid #284761;border-bottom:1px solid #284761}
.back-to-top{border-radius:7px;background:#13a9bd;box-shadow:none}
@media(prefers-reduced-motion:no-preference){.reveal{animation:fade .35s ease both}@keyframes fade{from{opacity:.01}to{opacity:1}}}