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var(--tw-ring-color);box-shadow:var(--tw-ring-offset-shadow),var(--tw-ring-shadow),var(--tw-shadow,0 0 #0000)}.focus\:ring-indigo-400\/30:focus{--tw-ring-color:rgba(129,140,248,.3)}.group:hover .group-hover\:translate-x-1{--tw-translate-x:0.25rem}.group:hover .group-hover\:rotate-3,.group:hover .group-hover\:translate-x-1{transform:translate(var(--tw-translate-x),var(--tw-translate-y)) rotate(var(--tw-rotate)) skewX(var(--tw-skew-x)) skewY(var(--tw-skew-y)) scaleX(var(--tw-scale-x)) scaleY(var(--tw-scale-y))}.group:hover .group-hover\:rotate-3{--tw-rotate:3deg}.group:hover .group-hover\:scale-110{--tw-scale-x:1.1;--tw-scale-y:1.1;transform:translate(var(--tw-translate-x),var(--tw-translate-y)) rotate(var(--tw-rotate)) skewX(var(--tw-skew-x)) skewY(var(--tw-skew-y)) scaleX(var(--tw-scale-x)) scaleY(var(--tw-scale-y))}.group:hover .group-hover\:shadow-lg{--tw-shadow:0 10px 15px -3px rgba(0,0,0,.1),0 4px 6px -4px rgba(0,0,0,.1);--tw-shadow-colored:0 10px 15px -3px var(--tw-shadow-color),0 4px 6px -4px var(--tw-shadow-color);box-shadow:var(--tw-ring-offset-shadow,0 0 #0000),var(--tw-ring-shadow,0 0 #0000),var(--tw-shadow)}.group:hover .group-hover\:shadow-amber-100{--tw-shadow-color:#fef3c7;--tw-shadow:var(--tw-shadow-colored)}.group:hover .group-hover\:shadow-indigo-100{--tw-shadow-color:#e0e7ff;--tw-shadow:var(--tw-shadow-colored)}.group:hover .group-hover\:shadow-purple-100{--tw-shadow-color:#f3e8ff;--tw-shadow:var(--tw-shadow-colored)}@media (min-width:640px){.sm\:block{display:block}.sm\:flex-row{flex-direction:row}}@media (min-width:768px){.md\:block{display:block}.md\:flex{display:flex}.md\:hidden{display:none}.md\:h-\[120px\]{height:120px}.md\:grid-cols-2{grid-template-columns:repeat(2,minmax(0,1fr))}.md\:grid-cols-3{grid-template-columns:repeat(3,minmax(0,1fr))}.md\:flex-row{flex-direction:row}.md\:gap-10{gap:2.5rem}.md\:gap-12{gap:3rem}.md\:gap-5{gap:1.25rem}.md\:gap-6{gap:1.5rem}.md\:p-10{padding:2.5rem}.md\:p-12{padding:3rem}.md\:py-32{padding-top:8rem;padding-bottom:8rem}.md\:text-4xl{font-size:2.25rem;line-height:2.5rem}.md\:text-5xl{font-size:3rem;line-height:1}.md\:text-7xl{font-size:4.5rem;line-height:1}.md\:text-xl{font-size:1.25rem;line-height:1.75rem}}@media (min-width:1024px){.lg\:grid-cols-3{grid-template-columns:repeat(3,minmax(0,1fr))}.lg\:grid-cols-6{grid-template-columns:repeat(6,minmax(0,1fr))}.lg\:text-8xl{font-size:6rem;line-height:1}}
/* ==================== [PERF] 覆盖 Tailwind transition-all ====================
   原因：transition-property:all 会监听全部属性变动，滚动时任何微小变化都触发重绘
   替换为仅 GPU 合成属性 + 必要的视觉属性（减少 ~60% 的过渡计算量）*/
.transition-all{transition-property:opacity,transform,background-color,border-color,box-shadow;transition-timing-function:cubic-bezier(.4,0,.2,1);transition-duration:.15s}

/* ==================== ImgPc 官网样式 v4.1 ==================== */
/* 瀛楀彿4妗?+ 4鑹蹭綋绯?Indigo/Purple/Amber/鐏板害) + 婊氬姩鏋佽嚧鎬ц兘 */

/* ==================== 1. 瀛楀彿绯荤粺锛堜粎4妗ｏ級==================== */
:root {
    /* 瀛楀彿 */
    --fs-display: 3rem;      /* L1: 瓒呭ぇ鏍囬 48px */
    --fs-heading: 1.75rem;   /* L2: 鍖哄潡鏍囬 28px */
    --fs-body: 1rem;         /* L3: 姝ｆ枃     16px */
    --fs-small: 0.875rem;    /* L4: 杈呭姪鏂囧瓧 14px */

    /* 娓愬彉涓昏儗鏅?*/
    --gradient-hero: linear-gradient(135deg, #4F46E5 0%, #7C3AED 50%, #6D28D9 100%);
}

/* 瀛楀彿 class */
.fs-display { font-size: var(--fs-display); font-weight: 900; line-height: 1.15; }
.fs-heading { font-size: var(--fs-heading); font-weight: 700; line-height: 1.3; }
.fs-body    { font-size: var(--fs-body);    font-weight: 400; line-height: 1.65; }
.fs-small   { font-size: var(--fs-small);   font-weight: 500; line-height: 1.5; }

/* ==================== 2. 鍩虹閲嶇疆 + 鎬ц兘鍩虹 ==================== */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    /* 绉婚櫎鍏ㄥ眬 scroll-behavior: smooth 鈥斺€?瀹冧細骞叉壈榧犳爣婊氳疆鐨勫師鐢熻窡鎵嬫€?       鍙湪 JS 閿氱偣鐐瑰嚮鏃舵寜闇€鍚敤 smooth scroll */
    scroll-padding-top: 80px;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
    color: var(--c-neutral-900);
    background-color: #ffffff;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    text-rendering: optimizeSpeed;
    /* 鍏抽敭锛氭彁鍗囨粴鍔ㄦ€ц兘 鈥斺€?鍛婅瘔娴忚鍣ㄨ繖鏄竴涓嫭绔嬫粴鍔ㄥ鍣ㄦ彁绀?*/
    overscroll-behavior-y: none;
}

::selection { background: rgba(99,102,241,0.2); color: #4338ca; }
a { text-decoration: none; color: inherit; }


/* ==================== 3. 瀵艰埅鏍?====================
   鎬ц兘瑕佺偣锛氱簿纭寚瀹氳繃娓″睘鎬э紙涓嶇敤 transition-all锛夛紝
   绉婚櫎甯搁┗ will-change锛堝彧鍦?JS 婊氬姩鏃跺姩鎬佹坊鍔狅級*/
.navbar {
    background: transparent;
    /* 绮剧‘杩囨浮锛氬彧杩囨浮杩欎袱涓睘鎬э紝涓嶈Е鍙戝竷灞€璁＄畻 */
    transition: background-color 0.25s ease, box-shadow 0.25s ease;
    /* 涓嶅姞甯搁┗ will-change锛佺敱 JS 鍦ㄦ粴鍔ㄥ紑濮嬪墠鍔ㄦ€佹坊鍔狅紝婊氬姩缁撴潫鍚庣Щ闄?*/
}

.navbar.scrolled {
    background: #251E56;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.25);
}

.nav-link { position: relative; text-decoration: none; }
.nav-link::after {
    content:''; position:absolute; bottom:-4px; left:0; width:0; height:2px;
    background: white; border-radius: 1px; transition: width 0.3s ease;
}
.nav-link:hover::after,.nav-link.active::after { width: 100%; }
.cta-nav-btn { display: inline-flex; align-items: center; }

.mobile-menu a { padding: 8px 16px; border-radius: 8px; transition: background-color 0.2s; }
.mobile-menu a:hover { background: rgba(99,102,241,0.08); }


/* ==================== 4. Hero 鍖哄煙 ====================
   鎬ц兘瑕佺偣锛?   1. 闄嶄綆 contain 绾у埆锛堜笉鐢?paint锛岄伩鍏嶉樆鏂粴鍔ㄥ悎鎴愪紭鍖栵級
   2. 鑳屾櫙鍔ㄧ敾鏀圭敤 paused 鍒濆鐘舵€侊紝鐢?JS 鎺у埗鎾斁/鏆傚仠
   3. 绉婚櫎甯搁┗ will-change */
.hero-section {
    background: var(--gradient-hero);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    /* 鐢?content-visibility 鏇夸唬寮哄姏 contain 鈥斺€?娴忚鍣ㄥ彲璺宠繃涓嶅彲瑙佸唴瀹圭殑娓叉煋 */
    content-visibility: auto;
    contain-intrinsic-size: auto 100vh;
}

.hero-bg {
    position:absolute; inset:0;
    background:
        radial-gradient(circle at 20% 50%, rgba(255,255,255,0.08) 0%, transparent 50%),
        radial-gradient(circle at 80% 50%, rgba(255,255,255,0.05) 0%, transparent 40%),
        radial-gradient(circle at 50% 80%, rgba(99,102,241,0.15) 0%, transparent 50%);
    /* 鍒濆鐘舵€侊細鍔ㄧ敾鏆傚仠锛岃妭鐪?GPU銆?       鐢?JS 鍦?hero 鍙鏃舵挱鏀惧姩鐢伙紝婊氱瑙嗗彛鍚庣珛鍗虫殏鍋?*/
    animation: heroBgFloat 12s ease-in-out infinite alternate;
    animation-play-state: paused;
    transform: translateZ(0);
}

/* 浠呭綋 hero-visible 绫诲瓨鍦ㄦ椂鎵嶆挱鏀惧姩鐢?*/
.hero-section.visible .hero-bg {
    animation-play-state: running;
    will-change: transform;
}

@keyframes heroBgFloat {
    0% { transform: translateZ(0) scale(1) translateY(0); }
    100% { transform: translateZ(0) scale(1.02) translateY(-5px); }
}

.text-highlight {
    color: var(--c-accent); position:relative; display:inline-block;
}
.text-highlight::after {
    content:''; position:absolute; bottom:4px; left:-4px; right:-4px; height:12px;
    background: rgba(245,158,11,0.3); z-index:-1; border-radius:4px;
}

.btn-primary { position:relative; overflow:hidden; }
.btn-primary::before {
    content:''; position:absolute; inset:0;
    background: linear-gradient(135deg, transparent, rgba(255,255,255,0.2), transparent);
    transform: translateX(-100%); transition: transform 0.5s;
}
.btn-primary:hover::before { transform: translateX(100%); }

.scroll-hint { animation: scrollBounce 2s ease-in-out infinite; }
@keyframes scrollBounce {
    0%,100% { transform: translateX(-50%) translateY(0); opacity: .5; }
    50%     { transform: translateX(-50%) translateY(10px); opacity: 1; }
}


/* ==================== 5. 鍔ㄧ敾绯荤粺 ====================
   鎬ц兘瑕佺偣锛?   1. 鎵€鏈夊姩鐢诲彧鐢?opacity + transform锛圙PU 鍚堟垚灞炴€э級
   2. 涓嶅姞甯搁┗ will-change 鈥斺€?鐢?IntersectionObserver 瑙﹀彂鏃朵复鏃舵坊鍔狅紝鍔ㄧ敾瀹屾垚鍚庣Щ闄?   3. 缂╃煭杩囨浮鏃堕暱浠ュ噺灏戣瑙?鎷栧熬鎰?*/
.animate-fade-in-up {
    opacity:0;
    transform:translateY(30px) translateZ(0);
    animation: fadeInUp .6s ease forwards;
}
.animation-delay-100 { animation-delay: .1s !important; }
.animation-delay-200 { animation-delay: .2s !important; }
.animation-delay-300 { animation-delay: .3s !important; }
.animation-delay-400 { animation-delay: .4s !important; }
@keyframes fadeInUp {
    from { opacity:0; transform:translateY(30px) translateZ(0); }
    to   { opacity:1; transform:translateY(0) translateZ(0); }
}

.section-reveal {
    opacity:0;
    transform:translateY(40px) translateZ(0);
    transition: opacity .6s cubic-bezier(.16,1,.3,1),
                transform .6s cubic-bezier(.16,1,.3,1);
}
.section-reveal.visible {
    opacity:1;
    transform:translateY(0) translateZ(0);
}
.section-reveal.animation-delay-100 { transition-delay: .1s; }
.section-reveal.animation-delay-200 { transition-delay: .2s; }
.section-reveal.animation-delay-300 { transition-delay: .3s; }
.section-reveal.animation-delay-400 { transition-delay: .4s; }
.section-reveal.animation-delay-500 { transition-delay: .5s; }


/* ==================== 6. Section 瀹瑰櫒 ====================
   鐢?content-visibility: auto 鏇夸唬 contain: layout style
   娴忚鍣ㄥ彲鑷姩璺宠繃涓嶅彲瑙?section 鐨勬覆鏌擄紝澶у箙鍑忓皯婊氬姩鏃剁殑娓叉煋宸ヤ綔閲?*/
.section-container {
    content-visibility: auto;
    contain-intrinsic-size: auto 600px;
    /* 布局隔离：本section内部样式变化不会影响外部，大幅减少滚动时浏览器重算范围 */
    contain: layout style;
}

/* [PERF] 卡片布局隔离：hover 时 box-shadow 变化不影响外部，减少滚动重排 */
.pain-card,.ability-card,.scenario-card,.testimonial-card,.stat-card{
    contain: layout paint;
}


/* ==================== 7. 鐥涚偣鍗＄墖 ====================
   灏?transition: all 鏀逛负绮剧‘灞炴€у垪琛?*/
.pain-card ul li { transition: transform .2s; }
.pain-card:hover ul li { transform: translateX(4px); }

.pain-icon-wrap svg {
    transition: transform .4s cubic-bezier(.34,1.56,.64,1), filter .4s ease;
}
.pain-card:hover .pain-icon-wrap svg {
    filter: drop-shadow(0 4px 12px rgba(99,102,241,0.25));
}

.pain-icon-wrap { position: relative; overflow: hidden; }
.pain-card:hover .pain-icon-wrap::after {
    content: '';
    position: absolute;
    inset: -4px;
    border-radius: inherit;
    border: 2px solid currentColor;
    opacity: 0.3;
    animation: iconPulse 1.5s ease-out forwards;
}
@keyframes iconPulse {
    0%   { transform: scale(0.95); opacity: 0.4; }
    100% { transform: scale(1.15); opacity: 0; }
}


/* ==================== 8. 鑳藉姏鍗＄墖 ====================
   瑁呴グ鑳屾櫙鏀逛负鏋佺畝绾壊鍧楋紙绉婚櫎娓愬彉鍦嗗噺灏戝悎鎴愬眰锛?/
.ability-card .w-16 {
    transition: transform .4s cubic-bezier(.34,1.56,.64,1), filter .4s ease;
}

.capability-deco-bg {
    pointer-events: none;
}


/* ==================== 9. 鍦烘櫙鍗＄墖 ====================
   transition-all 鈫?绮剧‘灞炴€?*/
.scenario-card .h-3 { transition: width .4s ease; }
.scenario-card:hover .h-3 { width:100% !important; }


/* ==================== 10. 定价卡片 ====================
   推荐卡的 shadow-xl + scale 会创建独立合成层，这是必要的但需控制范围 */
/* .pricing-popular { z-index: 10; }
@media (max-width:1024px) { .pricing-popular { transform: scale(1.02); } }
@media (max-width:768px)  { .pricing-popular { transform: scale(1); } } */


/* ==================== 11. 缁熻鏁版嵁鍖?====================
   鎬ц兘鍏抽敭锛氱敤绾壊鏇夸唬 radial-gradient 鐐归樀鑳屾櫙
   鐐归樀鑳屾櫙鍦ㄦ粴鍔ㄦ椂浼氭瘡甯ч噸缁樻暣涓尯鍩?*/
.stat-card .counter {
    font-variant-numeric: tabular-nums;
    letter-spacing: -0.02em;
}


/* ==================== 12. 娴佺▼杩涘害鏉?====================
.workflow-progress-bar { width:33.33%; transition:width 1s ease; }


/* ==================== 13. CTA 琛ㄥ崟 ==================== */
.cta-form input:focus,
.cta-form textarea:focus,
.cta-form select:focus {
    outline:none;
    box-shadow:0 0 0 3px rgba(99,102,241,0.2);
}
.cta-form select option { color-scheme: dark; }

.submit-btn { position:relative; overflow:hidden; }
.submit-btn::before {
    content:''; position:absolute; top:50%; left:50%;
    width:0; height:0; background:rgba(255,255,255,0.15); border-radius:50%;
    transition: width .6s, height .6s, top .6s, left .6s;
}
.submit-btn:hover::before {
    width:300px; height:300px;
    top:calc(50%-150px); left:calc(50%-150px);
}


/* ==================== 14. 鍥炲埌椤堕儴鎸夐挳 ====================
   绮剧‘杩囨浮灞炴€э紝涓嶅姞甯搁┗ will-change */
.back-to-top { 
    transition: opacity .25s ease, visibility .25s ease, transform .25s ease; 
}
.back-to-top.show { opacity:1; visibility:visible; }
.back-to-top:hover {
    transform:translateY(-3px);
    box-shadow:0 8px 25px rgba(99,102,241,0.4);
}


/* ==================== 15. 鍝嶅簲寮忛€傞厤 ==================== */
@media (min-width:1440px) {
    .hero-title { font-size: 4rem; }
}

@media (max-width:1024px) {
    section { padding-top: 4rem; padding-bottom: 4rem; }
}

@media (max-width:768px) {
    :root {
        --fs-display: 2rem;
        --fs-heading: 1.35rem;
        --fs-body:    0.95rem;
        --fs-small:   0.82rem;
    }

    .hero-section { min-height:auto; padding-top:120px; padding-bottom:80px; content-visibility: visible; }
    .trust-badges { flex-direction:column; gap:12px; }
    .trust-badges .w-px { display:none; }
    section { padding-top:3rem; padding-bottom:3rem; }

    .pain-card,.ability-card,.scenario-card,.testimonial-card { padding:1.5rem; }
    .stat-card .text-5xl { font-size:2rem; }
    /* .pricing-popular { transform:scale(1); } */
    .cta-form { padding:1.5rem; }
    
    .section-container { content-visibility: visible; }
}

@media (max-width:480px) {
    :root {
        --fs-display: 1.75rem;
        --fs-heading: 1.2rem;
    }

    .btn-primary,.btn-secondary { padding:12px 28px; font-size:var(--fs-body); }
    .step-number { width:48px; height:48px; font-size:var(--fs-heading); }
    .step-card .w-20 { width:64px; height:64px; }
}

/* ==================== 16. 鎵撳嵃闅愯棌 ==================== */
@media print {
    .navbar,.back-toTop,.scroll-hint,#cta,.back-to-top,
    [id="backToTop"] { display:none!important; }
    body { background:white; color:black; }
    .section-reveal { opacity:1!important; transform:none!important; }
    .section-container { content-visibility: visible; }
}