/* RESET */
*{margin:0;padding:0;box-sizing:border-box}
body{font-family:'PingFang SC','Microsoft YaHei',sans-serif;color:#1a1a2e;line-height:1.6}
a{text-decoration:none;color:inherit}

/* NAV */
.nav{background:#fff;box-shadow:0 2px 12px rgba(0,0,0,.08);position:sticky;top:0;z-index:100}
.nav-inner{max-width:1200px;margin:0 auto;display:flex;align-items:center;gap:16px;padding:0 24px;height:64px}
.nav-inner > .logo{flex-shrink:0}
.nav-inner > .nav-links{flex:1;display:flex;justify-content:center;flex-wrap:wrap;gap:24px 32px}
.nav-inner > .nav-lang-wrap{flex-shrink:0;margin-inline-start:auto}
.nav-lang-select{font-size:13px;padding:7px 10px;border-radius:10px;border:1.5px solid #e5e7eb;background:#fff;color:#333;cursor:pointer;max-width:148px;font-weight:500}
.nav-lang-select:focus{outline:none;border-color:#5B5FEF;box-shadow:0 0 0 3px rgba(91,95,239,.15)}
.logo{font-size:22px;font-weight:700;color:#5B5FEF;letter-spacing:-0.5px}
.logo span{color:#FF6B35}
.nav-links{display:flex;gap:32px}
.nav-links a{font-size:15px;color:#333;font-weight:500;transition:color .2s}
.nav-links a:hover{color:#5B5FEF}
.nav-phone{font-size:15px;font-weight:600;color:#5B5FEF}

/* SECTION COMMON */
.section{padding:72px 0}
.section-alt{background:#f8f9ff}
.container{max-width:1200px;margin:0 auto;padding:0 24px}
.section-title{text-align:center;font-size:32px;font-weight:800;color:#1a1a2e;margin-bottom:8px}
.section-sub{text-align:center;font-size:15px;color:#666;margin-bottom:48px}
.tag-blue{display:inline-block;background:#eef2ff;color:#5B5FEF;font-size:12px;padding:3px 10px;border-radius:20px;margin-bottom:12px;font-weight:600}

/* BUTTONS */
.btn-primary{display:inline-block;background:#5B5FEF;color:#fff;padding:14px 36px;border-radius:8px;font-size:16px;font-weight:600;cursor:pointer;transition:background .2s;border:none}
.btn-primary:hover{background:#4a4ed8}

/* CLOUD LOGOS */
.cloud-logos{display:flex;flex-wrap:wrap;gap:16px;margin-bottom:32px}
.cloud-logo{background:#fff;border:1.5px solid #e5e7eb;border-radius:10px;padding:10px 20px;font-size:13px;font-weight:700;color:#333;display:flex;align-items:center;gap:8px;box-shadow:0 2px 8px rgba(0,0,0,.05)}
.dot{width:22px;height:22px;border-radius:0;display:inline-block;background:no-repeat center/contain;flex-shrink:0;vertical-align:-5px}
.cloud-logo .dot,.strip-logo .dot{width:22px;height:22px}
.dot-ali{background-image:url("images/brands/alibabacloud.svg")}
.dot-tx{background-image:url("images/brands/tencentcloud.svg")}
.dot-hw{background-image:url("images/brands/huawei.svg")}
.dot-aws{background-image:url("images/brands/amazonwebservices.svg")}
.dot-gcp{background-image:url("images/brands/googlecloud.svg")}
.dot-az{background-image:url("images/brands/microsoftazure.svg")}

/* TABS */
.tabs{display:flex;gap:10px;margin-bottom:32px;flex-wrap:wrap;justify-content:center}
.tab{display:inline-flex;align-items:center;gap:8px;padding:8px 18px 8px 14px;border-radius:22px;font-size:14px;font-weight:600;cursor:pointer;border:1.5px solid #e5e7eb;color:#555;background:#fff;transition:all .25s ease;user-select:none}
.tab .dot{width:18px;height:18px;border-radius:0;flex-shrink:0;vertical-align:middle}
.tab:hover{border-color:var(--tab-brand,#5B5FEF);color:var(--tab-brand,#5B5FEF);transform:translateY(-1px);box-shadow:0 6px 16px rgba(91,95,239,.10)}
.tab.active{background:var(--tab-brand,#5B5FEF);border-color:var(--tab-brand,#5B5FEF);color:#fff;box-shadow:0 8px 20px color-mix(in srgb,var(--tab-brand,#5B5FEF) 35%,transparent)}
.tab.active .dot{filter:brightness(0) invert(1)}

/* PRODUCT CARDS */
.product-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;transition:opacity .25s ease,transform .35s ease}
.product-grid.is-switching{opacity:0;transform:translateY(8px)}
.product-card{background:#fff;border-radius:12px;padding:20px;box-shadow:0 2px 16px rgba(0,0,0,.07);border:1.5px solid #f0f0f0;transition:box-shadow .2s}
.product-card:hover{box-shadow:0 6px 24px rgba(91,95,239,.15);border-color:#c7d2fe}
.product-card .badge{display:inline-block;background:#fff3ee;color:#FF6B35;font-size:11px;padding:2px 8px;border-radius:4px;margin-bottom:10px;font-weight:600}
.product-card h4{font-size:15px;font-weight:700;margin-bottom:6px;color:#1a1a2e}
.product-card .spec{font-size:12px;color:#888;margin-bottom:12px}
.product-card .price{color:#FF6B35;font-size:20px;font-weight:800}
.product-card .price span{font-size:13px;font-weight:400;color:#888}
.product-card .old-price{font-size:12px;color:#bbb;text-decoration:line-through;margin-left:6px}
.product-card .btn-buy{display:block;text-align:center;background:#5B5FEF;color:#fff;padding:8px;border-radius:6px;font-size:13px;font-weight:600;margin-top:14px;cursor:pointer;transition:background .2s}
.product-card .btn-buy:hover{background:#4a4ed8}

/* SCENARIO CARDS */
.scenario-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.scenario-card{background:#fff;border-radius:12px;padding:28px 24px;box-shadow:0 2px 16px rgba(0,0,0,.07);border:1.5px solid #f0f0f0;transition:all .2s}
.scenario-card:hover{box-shadow:0 6px 24px rgba(91,95,239,.15);transform:translateY(-2px)}
.scenario-icon{width:60px;height:60px;border-radius:16px;background:linear-gradient(135deg,#f6f7ff 0%,#eef0ff 100%);display:flex;align-items:center;justify-content:center;margin-bottom:18px;box-shadow:0 8px 18px rgba(91,95,239,.10),inset 0 0 0 1px rgba(91,95,239,.08);transition:transform .25s ease,box-shadow .25s ease}
.scenario-icon svg{width:36px;height:36px;display:block}
.scenario-card:hover .scenario-icon{transform:translateY(-2px) scale(1.04);box-shadow:0 14px 28px rgba(91,95,239,.20),inset 0 0 0 1px rgba(91,95,239,.12)}
.scenario-card h4{font-size:16px;font-weight:700;margin-bottom:8px}
.scenario-card p{font-size:13px;color:#888;line-height:1.7}

/* REVIEWS */
.review-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.review-card{background:#fff;border-radius:12px;padding:24px;box-shadow:0 2px 16px rgba(0,0,0,.07)}
.review-header{display:flex;align-items:center;gap:12px;margin-bottom:16px}
.review-avatar{width:46px;height:46px;border-radius:50%;background:linear-gradient(135deg,#c7d2fe,#a5b4fc);display:flex;align-items:center;justify-content:center;color:#5B5FEF;font-size:18px;font-weight:700;flex-shrink:0;overflow:hidden;box-shadow:0 2px 8px rgba(91,95,239,.18);border:2px solid #fff}
.review-avatar img{width:100%;height:100%;object-fit:cover;display:block}
.review-name{font-size:14px;font-weight:700}
.review-company{font-size:12px;color:#888}
.review-stars{color:#FBBF24;font-size:14px;margin-bottom:12px}
.review-text{font-size:13px;color:#555;line-height:1.8}

/* FOOTER */
.footer{background:#1a1a2e;color:#a5b4fc;padding:56px 0 0}
.footer-inner{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:40px;margin-bottom:32px}
.footer-friends{border-top:1px solid #2d2b6b;padding:18px 0 22px;font-size:12.5px;color:#6b7280;line-height:2}
.footer-friends-title{display:inline-block;font-weight:700;color:#a5b4fc;margin-right:14px;font-size:13px}
.footer-friends-list{color:#6b7280}
.footer-friends-list a{color:#6b7280;margin-right:18px;transition:color .2s}
.footer-friends-list a:hover{color:#a5b4fc}
.footer-friends-empty{color:#4b5563;font-style:italic;font-size:12px}
.footer-brand .logo{color:#fff;font-size:20px;margin-bottom:12px;display:block}
.footer-brand p{font-size:13px;color:#6b7280;line-height:1.8;margin-bottom:16px}
.footer-phone{font-size:20px;font-weight:700;color:#fff;margin-bottom:4px}
.footer-phone-label{font-size:12px;color:#6b7280}
.footer-col h5{font-size:14px;font-weight:700;color:#fff;margin-bottom:16px}
.footer-col a{display:block;font-size:13px;color:#6b7280;margin-bottom:8px;transition:color .2s}
.footer-col a:hover{color:#a5b4fc}
.footer-qr{width:80px;height:80px;background:#fff;border-radius:8px;display:flex;align-items:center;justify-content:center;color:#5B5FEF;font-size:11px;margin-bottom:8px}
.footer-qr-label{font-size:12px;color:#6b7280}
.footer-bottom{border-top:1px solid #2d2b6b;padding:20px 0;text-align:center;font-size:13px;color:#4b5563}

/* ── ANIMATIONS ── */
[data-reveal]{opacity:0;transform:translateY(28px);transition:opacity .6s ease,transform .6s ease}
[data-reveal="left"]{transform:translateX(-32px)}
[data-reveal="right"]{transform:translateX(32px)}
[data-reveal="scale"]{transform:scale(.92)}
[data-reveal].revealed{opacity:1;transform:none}

[data-stagger]>*{opacity:0;transform:translateY(24px);transition:opacity .5s ease,transform .5s ease}
[data-stagger].revealed>*{opacity:1;transform:none}
[data-stagger].revealed>*:nth-child(1){transition-delay:.05s}
[data-stagger].revealed>*:nth-child(2){transition-delay:.12s}
[data-stagger].revealed>*:nth-child(3){transition-delay:.19s}
[data-stagger].revealed>*:nth-child(4){transition-delay:.26s}
[data-stagger].revealed>*:nth-child(5){transition-delay:.33s}
[data-stagger].revealed>*:nth-child(6){transition-delay:.40s}
[data-stagger].revealed>*:nth-child(7){transition-delay:.47s}
[data-stagger].revealed>*:nth-child(8){transition-delay:.54s}

[data-reveal="faq-left"]{opacity:0;transform:translateX(120px);transition:opacity 1.2s ease,transform 1.2s ease}
[data-reveal="faq-right"]{opacity:0;transform:translateX(-120px);transition:opacity 1.2s ease,transform 1.2s ease}
[data-reveal="faq-left"].revealed,[data-reveal="faq-right"].revealed{opacity:1;transform:none}

@keyframes float{0%,100%{transform:translateY(0)}50%{transform:translateY(-10px)}}
@keyframes floatSlow{0%,100%{transform:translateY(0) rotate(0deg)}50%{transform:translateY(-14px) rotate(3deg)}}
@keyframes pulse{0%,100%{opacity:1}50%{opacity:.6}}
@keyframes fadeInDown{from{opacity:0;transform:translateY(-20px)}to{opacity:1;transform:none}}

.float-anim{animation:float 4s ease-in-out infinite}
.float-slow{animation:floatSlow 6s ease-in-out infinite}
.pulse-anim{animation:pulse 2.5s ease-in-out infinite}
.fade-in-down{animation:fadeInDown .7s ease both}

.nav-links a{position:relative}
.nav-links a::after{content:'';position:absolute;bottom:-2px;left:0;width:0;height:2px;background:#5B5FEF;transition:width .25s ease}
.nav-links a:hover::after{width:100%}

/* RIGHT CUSTOMER FLOAT（尺寸偏大，便于点击与识别） */
.lc-cs-float{position:fixed;right:16px;top:50%;transform:translateY(-50%);display:flex;flex-direction:column;align-items:center;gap:14px;z-index:999}
/* 顶部「购买咨询」卡通 + 标签（风格参考常见客服挂件） */
.lc-cs-promo{display:flex;flex-direction:column;align-items:center;gap:8px;text-decoration:none;color:inherit;cursor:pointer;margin-bottom:2px;-webkit-tap-highlight-color:transparent;transition:transform .2s ease,filter .2s ease}
.lc-cs-promo:hover{transform:translateY(-3px);filter:brightness(1.02)}
.lc-cs-promo:active{transform:scale(.98)}
.lc-cs-mascot{position:relative;width:78px;height:78px;flex-shrink:0}
.lc-cs-mascot-ring{position:absolute;inset:0;border-radius:50%;background:#fff;border:4px solid #e4e6ef;box-shadow:0 6px 18px rgba(26,26,46,.14);display:flex;align-items:center;justify-content:center;box-sizing:border-box}
.lc-cs-mascot-orange{width:58px;height:58px;border-radius:50%;background:linear-gradient(165deg,#ffb347 0%,#ff7a2e 52%,#ff6328 100%);display:flex;align-items:center;justify-content:center;overflow:hidden;box-shadow:inset 0 -4px 12px rgba(0,0,0,.06)}
.lc-cs-mascot-svg{width:44px;height:44px;display:block}
.lc-cs-heart-bubble{position:absolute;left:-4px;top:-6px;min-width:24px;height:22px;padding:0 6px;background:#fff8ee;border:1px solid rgba(255,150,90,.4);border-radius:10px 10px 10px 3px;display:flex;align-items:center;justify-content:center;font-size:12px;color:#e53935;line-height:1;font-weight:700;box-shadow:0 2px 8px rgba(0,0,0,.08);z-index:2}
.lc-cs-mascot-dot{position:absolute;right:4px;top:6px;width:10px;height:10px;border-radius:50%;background:#ff4d4f;border:2px solid #fff;box-shadow:0 0 0 1px rgba(0,0,0,.06);z-index:2}
.lc-cs-promo-label{background:linear-gradient(180deg,#fff2e0 0%,#fdebcd 100%);color:#5c3d28;font-size:13px;font-weight:700;letter-spacing:.06em;padding:9px 18px;border-radius:999px;border:1px solid rgba(255,175,120,.4);box-shadow:0 6px 16px rgba(255,140,80,.18);white-space:nowrap}
@media(max-width:960px){.lc-cs-mascot{width:74px;height:74px}}
.lc-cs-btn{width:58px;height:58px;border:none;border-radius:14px;background:#fff;box-shadow:0 12px 32px rgba(26,26,46,.2);display:flex;align-items:center;justify-content:center;color:#5B5FEF;cursor:pointer;position:relative;transition:transform .2s ease,box-shadow .2s ease,background .2s ease,color .2s ease}
.lc-cs-btn svg{width:28px;height:28px;display:block}
.lc-cs-btn:hover{transform:translateY(-2px) scale(1.05);box-shadow:0 18px 38px rgba(26,26,46,.24)}
.lc-cs-btn--telegram{color:#27A7E7}
.lc-cs-btn--telegram:hover{background:#27A7E7;color:#fff}
.lc-cs-btn--whatsapp{color:#25D366}
.lc-cs-btn--whatsapp:hover{background:#25D366;color:#fff}
.lc-cs-btn--top{background:linear-gradient(135deg,#5B5FEF,#7c3aed);color:#fff}
.lc-cs-tooltip{position:absolute;right:72px;top:50%;transform:translateY(-50%);background:#1a1a2e;color:#fff;font-size:13px;line-height:1.25;padding:10px 12px;border-radius:8px;white-space:nowrap;opacity:0;pointer-events:none;transition:opacity .2s ease,right .2s ease}
.lc-cs-btn:hover .lc-cs-tooltip{opacity:1;right:76px}
@media(max-width:960px){.lc-cs-float{right:12px;top:auto;bottom:22px;transform:none}}