*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;line-height:1.8;color:#2c3e50;background:#f7f9fc;transition:background .35s ease,color .35s ease;overflow-x:hidden;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}
a{color:#1a5fb4;text-decoration:none;transition:color .25s ease,opacity .25s ease}
a:hover{color:#e67e22}
img,svg{max-width:100%;height:auto;display:block}
button{font-family:inherit;cursor:pointer}
input{font-family:inherit}
::selection{background:#1a5fb4;color:#fff}
::-webkit-scrollbar{width:10px;height:10px}
::-webkit-scrollbar-track{background:#eef2f7}
::-webkit-scrollbar-thumb{background:linear-gradient(180deg,#1a5fb4,#0f3460);border-radius:6px}
::-webkit-scrollbar-thumb:hover{background:linear-gradient(180deg,#e67e22,#c0620f)}
.container{max-width:1200px;margin:0 auto;padding:0 20px;width:100%}

/* ===== Header ===== */
header.site-header{position:sticky;top:0;z-index:1000;background:rgba(255,255,255,.78);backdrop-filter:blur(18px) saturate(180%);-webkit-backdrop-filter:blur(18px) saturate(180%);border-bottom:1px solid rgba(232,238,245,.9);box-shadow:0 2px 20px rgba(26,26,46,.05);transition:background .35s ease,border-color .35s ease}
.header-inner{display:flex;align-items:center;justify-content:space-between;padding:12px 20px;max-width:1200px;margin:0 auto;gap:16px}
.logo{display:flex;align-items:center;gap:10px;font-size:20px;font-weight:800;color:#1a1a2e;letter-spacing:.5px;flex-shrink:0;transition:transform .3s ease}
.logo:hover{transform:scale(1.03)}
.logo svg{width:38px;height:38px;border-radius:10px;box-shadow:0 4px 14px rgba(26,26,46,.22);transition:box-shadow .3s ease}
.logo:hover svg{box-shadow:0 6px 20px rgba(230,126,34,.35)}
nav.main-nav ul{display:flex;gap:20px;list-style:none;flex-wrap:wrap}
nav.main-nav a{font-size:15px;color:#3a4a5c;font-weight:500;position:relative;padding:4px 0;white-space:nowrap}
nav.main-nav a::after{content:"";position:absolute;left:0;bottom:0;width:0;height:2px;background:linear-gradient(90deg,#1a5fb4,#e67e22);border-radius:2px;transition:width .3s ease}
nav.main-nav a:hover{color:#e67e22}
nav.main-nav a:hover::after{width:100%}
.header-actions{display:flex;align-items:center;gap:12px;flex-shrink:0}
.search-box{position:relative}
.search-box input{padding:8px 38px 8px 16px;border:1px solid #d5dee8;border-radius:22px;font-size:14px;width:170px;outline:none;background:rgba(255,255,255,.7);color:#2c3e50;transition:border-color .3s ease,width .3s ease,box-shadow .3s ease,background .3s ease}
.search-box input:focus{border-color:#1a5fb4;width:220px;box-shadow:0 0 0 4px rgba(26,95,180,.12);background:#fff}
.search-box input::placeholder{color:#9aa8b8}
.search-box button{position:absolute;right:8px;top:50%;transform:translateY(-50%);background:none;border:none;color:#7a8a9a;display:flex;align-items:center;justify-content:center;padding:4px;border-radius:50%;transition:color .25s ease,background .25s ease}
.search-box button:hover{color:#1a5fb4;background:rgba(26,95,180,.08)}
.theme-toggle{background:rgba(255,255,255,.6);border:1px solid #d5dee8;border-radius:50%;width:38px;height:38px;font-size:16px;display:flex;align-items:center;justify-content:center;transition:background .25s ease,transform .35s ease,border-color .35s ease}
.theme-toggle:hover{background:#eef4fb;transform:rotate(20deg) scale(1.08)}
.mobile-menu-btn{display:none;background:none;border:none;font-size:24px;color:#1a1a2e;padding:4px;line-height:1}

/* ===== Breadcrumb ===== */
.breadcrumb{max-width:1200px;margin:16px auto 0;padding:0 20px;font-size:13px;color:#7a8a9a;display:flex;align-items:center;flex-wrap:wrap}
.breadcrumb a{color:#7a8a9a}
.breadcrumb a:hover{color:#1a5fb4}
.breadcrumb span{margin:0 6px}

/* ===== Banner ===== */
.banner{position:relative;overflow:hidden;border-radius:18px;margin:20px auto;max-width:1200px;box-shadow:0 16px 50px rgba(26,26,46,.16);width:calc(100% - 40px)}
.banner-slides{display:flex;transition:transform .7s cubic-bezier(.65,.05,.36,1)}
.banner-slide{min-width:100%;padding:72px 48px;color:#fff;position:relative;overflow:hidden}
.banner-slide::before{content:"";position:absolute;inset:0;background:radial-gradient(circle at 80% 20%,rgba(255,255,255,.16),transparent 55%);pointer-events:none}
.banner-slide::after{content:"";position:absolute;top:-40%;right:-10%;width:420px;height:420px;border-radius:50%;background:radial-gradient(circle,rgba(230,126,34,.28),transparent 70%);pointer-events:none}
.banner-slide h2{font-size:32px;margin-bottom:16px;font-weight:800;letter-spacing:.5px;position:relative;z-index:1;text-shadow:0 2px 20px rgba(0,0,0,.2)}
.banner-slide p{font-size:16px;opacity:.94;max-width:660px;position:relative;z-index:1;line-height:1.9}
.banner-slide:nth-child(1){background:linear-gradient(135deg,#1a1a2e 0%,#16213e 45%,#0f3460 100%)}
.banner-slide:nth-child(2){background:linear-gradient(135deg,#2d1b4e 0%,#4a2c6d 50%,#6b3fa0 100%)}
.banner-slide:nth-child(3){background:linear-gradient(135deg,#0d3b66 0%,#1a5fb4 50%,#2d7dd2 100%)}
.banner-dots{position:absolute;bottom:20px;left:50%;transform:translateX(-50%);display:flex;gap:10px;z-index:3}
.banner-dots button{width:11px;height:11px;border-radius:50%;border:2px solid rgba(255,255,255,.65);background:transparent;padding:0;transition:background .3s ease,transform .3s ease,border-color .3s ease}
.banner-dots button:hover{transform:scale(1.25)}
.banner-dots button.active{background:#fff;border-color:#fff;transform:scale(1.15);box-shadow:0 0 12px rgba(255,255,255,.7)}
.banner-arrow{position:absolute;top:50%;transform:translateY(-50%);background:rgba(255,255,255,.14);backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px);border:1px solid rgba(255,255,255,.22);color:#fff;font-size:26px;width:46px;height:46px;border-radius:50%;display:flex;align-items:center;justify-content:center;z-index:3;transition:background .3s ease,transform .3s ease}
.banner-arrow:hover{background:rgba(255,255,255,.32);transform:translateY(-50%) scale(1.1)}
.banner-arrow.prev{left:18px}
.banner-arrow.next{right:18px}

/* ===== Sections ===== */
section{padding:52px 0}
section h2{font-size:27px;color:#1a1a2e;margin-bottom:8px;position:relative;padding-left:18px;font-weight:800;letter-spacing:.3px}
section h2::before{content:"";position:absolute;left:0;top:6px;bottom:6px;width:5px;background:linear-gradient(180deg,#1a5fb4,#e67e22);border-radius:3px;box-shadow:0 2px 10px rgba(26,95,180,.35)}
section h3{font-size:20px;color:#1a1a2e;margin:28px 0 12px;font-weight:700}
section h4{font-size:17px;color:#3a4a5c;margin:18px 0 8px;font-weight:600}
section p{margin-bottom:14px;color:#3a4a5c;font-size:15px}
.section-sub{color:#7a8a9a;font-size:14px;margin-bottom:28px;padding-left:18px}

/* ===== Grids ===== */
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:22px}
.grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}

/* ===== Cards ===== */
.card{background:rgba(255,255,255,.85);backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);border-radius:16px;padding:26px;box-shadow:0 6px 22px rgba(26,26,46,.07);transition:transform .35s cubic-bezier(.34,1.4,.64,1),box-shadow .35s ease,border-color .35s ease;border:1px solid rgba(238,242,247,.9);position:relative;overflow:hidden}
.card::before{content:"";position:absolute;top:0;left:0;right:0;height:3px;background:linear-gradient(90deg,#1a5fb4,#e67e22);transform:scaleX(0);transform-origin:left;transition:transform .4s ease}
.card:hover{transform:translateY(-6px);box-shadow:0 16px 40px rgba(26,26,46,.14);border-color:rgba(26,95,180,.22)}
.card:hover::before{transform:scaleX(1)}
.card h3{margin-top:0;font-size:18px;color:#1a1a2e;font-weight:700}
.card h4{font-size:16px;color:#1a1a2e}
.card p{font-size:14px;color:#5a6a7c;margin-bottom:8px}
.card .meta{font-size:12px;color:#9aa8b8;margin-top:10px}

/* ===== Stats ===== */
.stat-card{text-align:center;padding:32px 18px}
.stat-number{font-size:36px;font-weight:900;display:block;background:linear-gradient(135deg,#1a5fb4,#e67e22);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;letter-spacing:-1px}
.stat-label{font-size:14px;color:#7a8a9a;margin-top:6px;display:block}

/* ===== Tags ===== */
.tag{display:inline-block;background:linear-gradient(135deg,#eef4fb,#e0ecf9);color:#1a5fb4;font-size:12px;padding:4px 12px;border-radius:14px;margin-right:6px;margin-bottom:6px;font-weight:500;transition:transform .25s ease,box-shadow .25s ease}
.tag:hover{transform:translateY(-2px);box-shadow:0 4px 12px rgba(26,95,180,.2)}

/* ===== FAQ ===== */
.faq-item{background:rgba(255,255,255,.85);backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);border:1px solid rgba(238,242,247,.9);border-radius:14px;margin-bottom:12px;overflow:hidden;transition:box-shadow .3s ease,border-color .3s ease}
.faq-item:hover{box-shadow:0 8px 24px rgba(26,26,46,.09);border-color:rgba(26,95,180,.18)}
.faq-item.open{border-color:rgba(26,95,180,.3);box-shadow:0 10px 28px rgba(26,95,180,.12)}
.faq-question{padding:16px 20px;cursor:pointer;display:flex;justify-content:space-between;align-items:center;font-weight:600;color:#1a1a2e;font-size:15px;user-select:none;gap:12px;transition:background .25s ease}
.faq-question:hover{background:rgba(247,249,252,.9)}
.faq-question .arrow{transition:transform .35s ease;font-size:13px;color:#7a8a9a;flex-shrink:0}
.faq-item.open .faq-question .arrow{transform:rotate(180deg);color:#1a5fb4}
.faq-answer{max-height:0;overflow:hidden;transition:max-height .45s cubic-bezier(.4,0,.2,1),padding .35s ease;padding:0 20px;color:#5a6a7c;font-size:14px}
.faq-item.open .faq-answer{max-height:700px;padding:0 20px 18px}
.faq-answer p{margin-bottom:0;font-size:14px;color:#5a6a7c}

/* ===== HowTo ===== */
.howto-step{display:flex;gap:16px;margin-bottom:18px;background:rgba(255,255,255,.85);backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);border-radius:14px;padding:20px 22px;border:1px solid rgba(238,242,247,.9);transition:transform .3s ease,box-shadow .3s ease,border-color .3s ease}
.howto-step:hover{transform:translateX(6px);box-shadow:0 10px 28px rgba(26,26,46,.1);border-color:rgba(26,95,180,.2)}
.step-num{flex-shrink:0;width:38px;height:38px;border-radius:50%;background:linear-gradient(135deg,#1a5fb4,#e67e22);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:800;font-size:15px;box-shadow:0 6px 16px rgba(26,95,180,.3)}
.step-content h4{margin:0 0 6px;font-size:16px;color:#1a1a2e}
.step-content p{margin:0;font-size:14px;color:#5a6a7c}

/* ===== Articles ===== */
.article-card{background:rgba(255,255,255,.85);backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);border-radius:16px;padding:24px;box-shadow:0 6px 22px rgba(26,26,46,.07);border:1px solid rgba(238,242,247,.9);transition:transform .35s cubic-bezier(.34,1.4,.64,1),box-shadow .35s ease,border-color .35s ease;display:flex;flex-direction:column}
.article-card:hover{transform:translateY(-5px);box-shadow:0 16px 40px rgba(26,26,46,.13);border-color:rgba(230,126,34,.25)}
.article-card h3{font-size:17px;margin:0 0 8px;color:#1a1a2e;font-weight:700;line-height:1.5}
.article-card .date{font-size:12px;color:#9aa8b8;margin-bottom:10px}
.article-card .excerpt{font-size:14px;color:#5a6a7c;margin-bottom:14px;flex-grow:1}
.article-card .read-more{font-size:14px;color:#1a5fb4;font-weight:600;display:inline-flex;align-items:center;gap:4px;transition:gap .25s ease,color .25s ease}
.article-card .read-more:hover{color:#e67e22;gap:9px}

/* ===== Case ===== */
.case-card{background:rgba(255,255,255,.85);backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);border-radius:16px;padding:24px;border:1px solid rgba(238,242,247,.9);box-shadow:0 6px 22px rgba(26,26,46,.07);transition:transform .35s ease,box-shadow .35s ease,border-color .35s ease;position:relative}
.case-card:hover{transform:translateY(-5px);box-shadow:0 16px 40px rgba(26,26,46,.13);border-color:rgba(26,95,180,.22)}
.case-card h3{font-size:17px;margin:0 0 10px;color:#1a1a2e;font-weight:700}
.case-card .result{font-size:14px;color:#1a5fb4;font-weight:600;margin-top:10px;padding-left:12px;border-left:3px solid #e67e22}

/* ===== Testimonial ===== */
.testimonial{background:rgba(255,255,255,.85);backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);border-radius:16px;padding:24px;border-left:4px solid #e67e22;box-shadow:0 6px 22px rgba(26,26,46,.07);transition:transform .35s ease,box-shadow .35s ease}
.testimonial:hover{transform:translateY(-5px);box-shadow:0 16px 40px rgba(26,26,46,.13)}
.testimonial p{font-size:14px;color:#5a6a7c;font-style:italic;margin-bottom:12px}
.testimonial .author{font-size:13px;color:#1a1a2e;font-weight:700}
.testimonial .role{font-size:12px;color:#9aa8b8}

/* ===== Contact ===== */
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:30px}
.contact-info{background:rgba(255,255,255,.85);backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);border-radius:16px;padding:28px;border:1px solid rgba(238,242,247,.9);box-shadow:0 6px 22px rgba(26,26,46,.07)}
.contact-info p{margin-bottom:12px;font-size:14px;color:#5a6a7c}
.contact-info strong{color:#1a1a2e}
.map-placeholder{background:linear-gradient(135deg,#eef4fb,#dce8f5);border-radius:16px;height:100%;min-height:280px;display:flex;align-items:center;justify-content:center;color:#7a8a9a;font-size:14px;border:1px solid #dce8f5;overflow:hidden;box-shadow:0 6px 22px rgba(26,26,46,.07)}

/* ===== Anchor Nav ===== */
.anchor-nav{background:rgba(255,255,255,.85);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border-radius:16px;padding:20px 24px;margin:20px auto;max-width:1200px;box-shadow:0 6px 22px rgba(26,26,46,.07);border:1px solid rgba(238,242,247,.9);width:calc(100% - 40px)}
.anchor-nav h3{font-size:15px;margin-bottom:12px;color:#1a1a2e;font-weight:700}
.anchor-nav ul{display:flex;flex-wrap:wrap;gap:10px;list-style:none}
.anchor-nav a{font-size:13px;background:linear-gradient(135deg,#eef4fb,#e0ecf9);padding:6px 14px;border-radius:16px;color:#1a5fb4;font-weight:500;transition:background .3s ease,color .3s ease,transform .25s ease,box-shadow .25s ease;display:inline-block}
.anchor-nav a:hover{background:linear-gradient(135deg,#1a5fb4,#0f3460);color:#fff;transform:translateY(-2px);box-shadow:0 6px 16px rgba(26,95,180,.3)}

/* ===== Sitemap & Links ===== */
.sitemap-list{columns:2;column-gap:30px;list-style:none}
.sitemap-list li{margin-bottom:9px;font-size:14px;break-inside:avoid}
.sitemap-list a{color:#1a5fb4;transition:padding-left .25s ease,color .25s ease}
.sitemap-list a:hover{color:#e67e22;padding-left:4px}
.friend-links{display:flex;flex-wrap:wrap;gap:14px;list-style:none}
.friend-links a{font-size:13px;color:#5a6a7c;background:rgba(255,255,255,.85);padding:8px 16px;border-radius:18px;border:1px solid rgba(238,242,247,.9);transition:color .3s ease,border-color .3s ease,transform .25s ease,box-shadow .25s ease;display:inline-block}
.friend-links a:hover{color:#1a5fb4;border-color:#1a5fb4;transform:translateY(-2px);box-shadow:0 6px 16px rgba(26,95,180,.15)}

/* ===== Footer ===== */
footer.site-footer{background:linear-gradient(180deg,#1a1a2e,#12121f);color:#b0b8c4;padding:54px 0 26px;margin-top:44px;position:relative;overflow:hidden}
footer.site-footer::before{content:"";position:absolute;top:0;left:0;right:0;height:3px;background:linear-gradient(90deg,#1a5fb4,#e67e22,#1a5fb4)}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1.5fr;gap:32px;margin-bottom:36px;position:relative;z-index:1}
.footer-grid h4{color:#fff;font-size:16px;margin-bottom:16px;font-weight:700;position:relative;padding-bottom:8px}
.footer-grid h4::after{content:"";position:absolute;left:0;bottom:0;width:28px;height:2px;background:linear-gradient(90deg,#e67e22,transparent);border-radius:2px}
.footer-grid ul{list-style:none}
.footer-grid li{margin-bottom:9px;font-size:13px}
.footer-grid a{color:#b0b8c4;font-size:13px;transition:color .25s ease,padding-left .25s ease}
.footer-grid a:hover{color:#e67e22;padding-left:4px}
.footer-bottom{border-top:1px solid #2c3a4e;padding-top:22px;text-align:center;font-size:12px;color:#7a8a9a;position:relative;z-index:1}
.footer-bottom p{margin-bottom:6px}

/* ===== Back to Top ===== */
.back-to-top{position:fixed;right:24px;bottom:24px;width:46px;height:46px;border-radius:50%;background:linear-gradient(135deg,#1a5fb4,#e67e22);color:#fff;border:none;font-size:20px;display:flex;align-items:center;justify-content:center;box-shadow:0 8px 24px rgba(26,95,180,.4);opacity:0;visibility:hidden;transform:translateY(16px);transition:opacity .35s ease,visibility .35s ease,transform .35s ease,box-shadow .3s ease;z-index:999}
.back-to-top.show{opacity:1;visibility:visible;transform:translateY(0)}
.back-to-top:hover{box-shadow:0 12px 32px rgba(230,126,34,.5);transform:translateY(-3px) scale(1.06)}

/* ===== Reveal Animation ===== */
.reveal{opacity:0;transform:translateY(28px);transition:opacity .7s cubic-bezier(.22,1,.36,1),transform .7s cubic-bezier(.22,1,.36,1)}
.reveal.visible{opacity:1;transform:none}

/* ===== Dark Mode ===== */
body.dark{background:#12161c;color:#c4ccd6}
body.dark ::selection{background:#e67e22;color:#fff}
body.dark ::-webkit-scrollbar-track{background:#1b212a}
body.dark header.site-header{background:rgba(18,22,28,.82);border-bottom-color:#232a33;box-shadow:0 2px 20px rgba(0,0,0,.35)}
body.dark .logo{color:#e8eef5}
body.dark nav.main-nav a{color:#a8b4c2}
body.dark nav.main-nav a:hover{color:#e67e22}
body.dark .search-box input{background:rgba(27,33,42,.8);border-color:#2a323d;color:#e8eef5}
body.dark .search-box input:focus{background:#1b212a;border-color:#1a5fb4;box-shadow:0 0 0 4px rgba(26,95,180,.22)}
body.dark .search-box input::placeholder{color:#6a7888}
body.dark .search-box button{color:#7a8a9a}
body.dark .search-box button:hover{color:#7fb0e8;background:rgba(127,176,232,.12)}
body.dark .theme-toggle{background:rgba(27,33,42,.8);border-color:#2a323d}
body.dark .theme-toggle:hover{background:#232a33}
body.dark .mobile-menu-btn{color:#e8eef5}
body.dark .card,body.dark .faq-item,body.dark .article-card,body.dark .case-card,body.dark .testimonial,body.dark .contact-info,body.dark .anchor-nav,body.dark .howto-step{background:rgba(27,33,42,.85);border-color:#2a323d}
body.dark .card:hover,body.dark .article-card:hover,body.dark .case-card:hover,body.dark .testimonial:hover{border-color:rgba(127,176,232,.3)}
body.dark section h2,body.dark section h3,body.dark .card h3,body.dark .card h4,body.dark .step-content h4,body.dark .article-card h3,body.dark .case-card h3{color:#e8eef5}
body.dark section p,body.dark .card p,body.dark .step-content p,body.dark .article-card .excerpt,body.dark .testimonial p,body.dark .contact-info p{color:#a8b4c2}
body.dark .faq-question{color:#e8eef5}
body.dark .faq-question:hover{background:rgba(35,42,51,.9)}
body.dark .faq-answer,body.dark .faq-answer p{color:#a8b4c2}
body.dark .faq-item.open{border-color:rgba(127,176,232,.32);box-shadow:0 10px 28px rgba(0,0,0,.3)}
body.dark .anchor-nav a{background:linear-gradient(135deg,#232a33,#1b212a);color:#7fb0e8}
body.dark .anchor-nav a:hover{background:linear-gradient(135deg,#1a5fb4,#0f3460);color:#fff}
body.dark .sitemap-list a{color:#7fb0e8}
body.dark .sitemap-list a:hover{color:#e67e22}
body.dark .friend-links a{background:rgba(27,33,42,.85);border-color:#2a323d;color:#a8b4c2}
body.dark .friend-links a:hover{color:#7fb0e8;border-color:#7fb0e8;box-shadow:0 6px 16px rgba(127,176,232,.18)}
body.dark .map-placeholder{background:linear-gradient(135deg,#1b212a,#232a33);border-color:#2a323d}
body.dark .breadcrumb,body.dark .breadcrumb a{color:#7a8a9a}
body.dark .breadcrumb a:hover{color:#7fb0e8}
body.dark .article-card .read-more{color:#7fb0e8}
body.dark .article-card .read-more:hover{color:#e67e22}
body.dark .case-card .result{color:#7fb0e8}
body.dark .section-sub{color:#7a8a9a}
body.dark .tag{background:linear-gradient(135deg,#232a33,#1b212a);color:#7fb0e8}
body.dark .stat-label{color:#7a8a9a}
body.dark .footer-grid h4{color:#fff}
body.dark .logo svg{box-shadow:0 4px 14px rgba(0,0,0,.5)}
body.dark .step-num{box-shadow:0 6px 16px rgba(0,0,0,.4)}

/* ===== Responsive ===== */
@media(max-width:1024px){
nav.main-nav ul{gap:14px}
nav.main-nav a{font-size:14px}
.search-box input{width:140px}
.search-box input:focus{width:180px}
}
@media(max-width:900px){
.grid-3,.grid-4{grid-template-columns:repeat(2,1fr)}
.footer-grid{grid-template-columns:1fr 1fr;gap:26px}
.contact-grid{grid-template-columns:1fr}
.banner-slide{padding:56px 36px}
.banner-slide h2{font-size:26px}
}
@media(max-width:768px){
nav.main-nav{display:none;position:absolute;top:100%;left:0;right:0;background:rgba(255,255,255,.96);backdrop-filter:blur(18px);-webkit-backdrop-filter:blur(18px);flex-direction:column;padding:18px 22px;box-shadow:0 12px 30px rgba(0,0,0,.12);border-bottom:1px solid #eef2f7;animation:navSlide .3s ease}
@keyframes navSlide{from{opacity:0;transform:translateY(-8px)}to{opacity:1;transform:translateY(0)}}
nav.main-nav.open{display:flex}
nav.main-nav ul{flex-direction:column;gap:14px;width:100%}
nav.main-nav a{font-size:15px;display:block;padding:6px 0}
.mobile-menu-btn{display:block}
body.dark nav.main-nav{background:rgba(27,33,42,.96);border-bottom-color:#2a323d}
}
@media(max-width:640px){
section{padding:40px 0}
section h2{font-size:22px}
section h3{font-size:18px}
.banner{border-radius:14px;width:calc(100% - 32px);margin:16px auto}
.banner-slide{padding:44px 24px}
.banner-slide h2{font-size:21px;margin-bottom:12px}
.banner-slide p{font-size:14px}
.banner-arrow{width:38px;height:38px;font-size:20px}
.banner-arrow.prev{left:10px}
.banner-arrow.next{right:10px}
.search-box input{width:110px;padding:7px 32px 7px 12px}
.search-box input:focus{width:150px}
.grid-3,.grid-4,.grid-2{grid-template-columns:1fr}
.footer-grid{grid-template-columns:1fr;gap:24px}
.sitemap-list{columns:1}
.anchor-nav{width:calc(100% - 32px);padding:16px 18px}
.anchor-nav ul{gap:8px}
.anchor-nav a{font-size:12px;padding:5px 11px}
.card,.article-card,.case-card,.testimonial,.contact-info{padding:20px}
.howto-step{padding:16px 18px;gap:12px}
.step-num{width:32px;height:32px;font-size:13px}
.back-to-top{right:16px;bottom:16px;width:42px;height:42px}
.header-inner{padding:10px 16px;gap:10px}
.logo{font-size:18px}
.logo svg{width:32px;height:32px}
.faq-question{padding:14px 16px;font-size:14px}
.faq-item.open .faq-answer{padding:0 16px 16px}
.breadcrumb{padding:0 16px}
}
@media(max-width:380px){
.search-box{display:none}
.banner-slide h2{font-size:19px}
section h2{font-size:20px}
}

/* ===== Accessibility ===== */
@media(prefers-reduced-motion:reduce){
*{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important;scroll-behavior:auto!important}
.reveal{opacity:1;transform:none}
}
:focus-visible{outline:2px solid #1a5fb4;outline-offset:2px;border-radius:4px}
body.dark :focus-visible{outline-color:#7fb0e8}

/* ===== Print ===== */
@media print{
header.site-header,.banner,.back-to-top,.anchor-nav,.theme-toggle,.mobile-menu-btn,.search-box{display:none}
body{background:#fff;color:#000}
.card,.article-card,.case-card,.testimonial,.faq-item{box-shadow:none;border:1px solid #ddd}
}