/* 全站共用：设计变量、基础排版与滚动条、背景装饰、容器与区块骨架、栅格与按钮、导航、卡片/证言/弹窗/侧栏等。新页面先引入本文件再引入页面专用 CSS。 */

@import url("../fonts/inter.css");
@import url("../fonts/plus-jakarta-sans.css");

:root {
    /* Modern tokens */
    --background-deep: #020203;
    --background-base: #050506;
    --background-elevated: #0a0a0c;
    --surface: rgba(255,255,255,0.05);
    --surface-hover: rgba(255,255,255,0.08);
    --foreground: #EDEDEF;
    --foreground-muted: #8A8F98;
    --foreground-subtle: rgba(255,255,255,0.60);
    --accent: #5E6AD2;
    --accent-bright: #6872D9;
    --accent-glow: rgba(94,106,210,0.3);
    --border-default: rgba(255,255,255,0.06);
    --border-hover: rgba(255,255,255,0.10);
    --border-accent: rgba(94,106,210,0.30);
    --radius-lg: 16px;
    --radius-md: 12px;
    --radius-sm: 8px;
    --ease-expo-out: cubic-bezier(0.16, 1, 0.3, 1);
    --t-fast: 200ms;
    --t-base: 300ms;
    --shadow-card: 0 0 0 1px rgba(255,255,255,0.06), 0 2px 20px rgba(0,0,0,0.40), 0 0 40px rgba(0,0,0,0.20);
    --shadow-card-hover: 0 0 0 1px rgba(255,255,255,0.10), 0 8px 40px rgba(0,0,0,0.50), 0 0 80px rgba(94,106,210,0.10);
    --shadow-accent: 0 0 0 1px rgba(94,106,210,0.50), 0 4px 12px rgba(94,106,210,0.30), inset 0 1px 0 0 rgba(255,255,255,0.18);

    /* Legacy aliases (keep existing class rules working) */
    --primary: var(--accent);
    --primary-hover: var(--accent-bright);
    --primary-light: rgba(94,106,210,0.14);
    --success: #10b981;
    --bg-white: var(--background-elevated);
    --bg-gray: var(--background-base);
    --text-main: var(--foreground);
    --text-muted: var(--foreground-muted);
    --border: var(--border-default);
    --shadow-sm: var(--shadow-card);
    --shadow-md: var(--shadow-card-hover);

    /* 暗色滚动条（与页面暗黑 UI 一致） */
    --scrollbar-track: #2c2c2c;
    --scrollbar-thumb: #7a7a7a;
    --scrollbar-thumb-hover: #949494;
    --scrollbar-button-bg: #2c2c2c;
    --scrollbar-arrow: #c8c8c8;
    --scrollbar-accent: #ff8c00;
    --scrollbar-size: 10px;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family:"Plus Jakarta Sans",  "Inter", "PingFang SC", "Microsoft YaHei", "Noto Serif SC", "Helvetica Neue", Arial, sans-serif;
    background: radial-gradient(ellipse at top, #0a0a0f 0%, var(--background-base) 55%, var(--background-deep) 100%);
    color: var(--foreground);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    text-rendering: geometricPrecision;
    overflow-x: hidden;
}

/* Global scrollbar styling（暗色胶囊轨道 + 箭头按钮，Firefox 仅轨道/滑块） */
html {
    scrollbar-gutter: stable;
    scrollbar-width: thin;
    scrollbar-color: var(--scrollbar-thumb) var(--scrollbar-track);
}

html::-webkit-scrollbar {
    width: var(--scrollbar-size);
    height: var(--scrollbar-size);
}

html::-webkit-scrollbar-track {
    background: var(--scrollbar-track);
    border-radius: 999px;
}

html::-webkit-scrollbar-thumb {
    background: var(--scrollbar-thumb);
    border-radius: 999px;
    border: 2px solid var(--scrollbar-track);
    background-clip: padding-box;
}

html::-webkit-scrollbar-thumb:hover {
    background: var(--scrollbar-thumb-hover);
}

html::-webkit-scrollbar-corner {
    background: var(--scrollbar-track);
}

/* 上下箭头（WebKit / Blink；部分系统为叠加滚动条时可能不显示） */
html::-webkit-scrollbar-button:single-button:vertical:decrement,
html::-webkit-scrollbar-button:vertical:start:decrement {
    display: block;
    height: calc(var(--scrollbar-size) + 4px);
    width: var(--scrollbar-size);
    background-color: var(--scrollbar-button-bg);
    border-radius: 999px 999px 3px 3px;
    background-repeat: no-repeat;
    background-position: center;
    background-size: 8px 5px;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='8' height='5' viewBox='0 0 8 5'%3E%3Cpath fill='%23c8c8c8' d='M4%200%20L8%205%20L0%205Z'/%3E%3C/svg%3E");
}

html::-webkit-scrollbar-button:single-button:vertical:increment,
html::-webkit-scrollbar-button:vertical:end:increment {
    display: block;
    height: calc(var(--scrollbar-size) + 4px);
    width: var(--scrollbar-size);
    background-color: var(--scrollbar-button-bg);
    border-radius: 3px 3px 999px 999px;
    background-repeat: no-repeat;
    background-position: center;
    background-size: 8px 5px;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='8' height='5' viewBox='0 0 8 5'%3E%3Cpath fill='%23c8c8c8' d='M4%205%20L0%200%20L8%200Z'/%3E%3C/svg%3E");
    box-shadow: inset 2px 0 0 0 var(--scrollbar-accent);
}

a {
    text-decoration: none;
    color: inherit;
}

.bg-effects {
    position: fixed;
    inset: 0;
    pointer-events: none;
    z-index: -1;
}

.bg-noise {
    position: absolute;
    inset: 0;
    opacity: 0.015;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.8' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='160' height='160' filter='url(%23n)' opacity='.6'/%3E%3C/svg%3E");
    background-size: 220px 220px;
}

.bg-grid {
    position: absolute;
    inset: 0;
    opacity: 0.02;
    background-image:
        linear-gradient(to right, rgba(255,255,255,0.18) 1px, transparent 1px),
        linear-gradient(to bottom, rgba(255,255,255,0.18) 1px, transparent 1px);
    background-size: 64px 64px;
    mask-image: radial-gradient(circle at 30% 10%, rgba(0,0,0,1) 0%, rgba(0,0,0,0.4) 40%, rgba(0,0,0,0) 70%);
    animation: grid-drift 18s linear infinite;
}

.bg-blobs {
    position: absolute;
    inset: -20vh -20vw;
    filter: blur(120px);
}

.blob {
    position: absolute;
    border-radius: 999px;
    transform: translate3d(0, 0, 0);
    animation: float 9000ms ease-in-out infinite;
}

.blob-1 {
    width: 900px;
    height: 1400px;
    left: calc(50% - 450px);
    top: -220px;
    background: radial-gradient(circle at 30% 30%, rgba(94,106,210,0.26), rgba(94,106,210,0.08) 55%, transparent 70%);
}

.blob-2 {
    width: 620px;
    height: 860px;
    left: -120px;
    top: 140px;
    animation-duration: 10500ms;
    background: radial-gradient(circle at 30% 30%, rgba(168,85,247,0.16), rgba(236,72,153,0.08) 55%, transparent 72%);
}

.blob-3 {
    width: 520px;
    height: 760px;
    right: -120px;
    top: 260px;
    animation-duration: 9200ms;
    background: radial-gradient(circle at 30% 30%, rgba(59,130,246,0.12), rgba(99,102,241,0.07) 55%, transparent 74%);
}

.blob-4 {
    width: 900px;
    height: 560px;
    left: calc(50% - 450px);
    bottom: -260px;
    animation-duration: 9800ms;
    background: radial-gradient(circle at 40% 40%, rgba(94,106,210,0.12), rgba(94,106,210,0.06) 55%, transparent 76%);
}

@keyframes float {
    0%, 100% { transform: translateY(0) rotate(0deg); }
    50% { transform: translateY(-20px) rotate(1deg); }
}

@keyframes grid-drift {
    0% { background-position: 0 0, 0 0; }
    100% { background-position: 64px 64px, 64px 64px; }
}

@media (prefers-reduced-motion: reduce) {
    .blob { animation: none; }
    .bg-grid { animation: none; }
}

.container {
    width: 100%;
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 20px;
}

.section {
    padding: 96px 0;
}

.section + .section {
    position: relative;
    border-top: 0;
}

/* 区块分隔线：左右渐隐过渡（用 ::after 避免与区块装饰 ::before 冲突） */
.section + .section::after {
    content: "";
    position: absolute;
    left: 0;
    right: 0;
    top: 0;
    height: 1px;
    background: linear-gradient(
        to right,
        rgba(255, 255, 255, 0) 0%,
        rgba(255, 255, 255, 0) 8%,
        rgba(255, 255, 255, 0.18) 42%,
        rgba(255, 255, 255, 0.18) 58%,
        rgba(255, 255, 255, 0) 92%,
        rgba(255, 255, 255, 0) 100%
    );
    opacity: 0.55;
    pointer-events: none;
}

.bg-gray {
    background: transparent;
}



.section-header {
    text-align: center;
    margin-bottom: 48px;
    box-sizing: content-box;
}

.section-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 12px;
    font-weight: 700;
    color: var(--foreground-subtle);
    background: rgba(255,255,255,0.04);
    border: 1px solid var(--border-default);
    padding: 5px 12px;
    border-radius: 999px;
    margin-bottom: 12px;
    letter-spacing: normal;
}

.section-badge i {
    font-size: 11px;
    line-height: 1;
    opacity: 0.88;
    flex-shrink: 0;
}

.section-badge__label {
    letter-spacing: 0.18em;
}

.section-title {
    font-size: 40px;
    font-weight: 700;
    letter-spacing: -0.02em;
    line-height: 1.15;
    background: linear-gradient(to bottom, rgba(255,255,255,1), rgba(255,255,255,0.92) 45%, rgba(255,255,255,0.68));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.section-subtitle {
    margin-top: 8px;
    color: rgba(237, 237, 239, 0.70);
    font-size: 16px;
}

.section-badge--testimonials {
    color: rgba(186, 198, 255, 0.95);
    border-color: rgba(104, 114, 217, 0.38);
    background: rgba(94, 106, 210, 0.14);
}

.testimonial-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 24px;
}

.testimonial-card {
    display: flex;
    flex-direction: column;
    gap: 16px;
    padding: 28px 24px 24px;
    text-align: left;
    min-height: 100%;
}

.testimonial-stars {
    display: flex;
    gap: 4px;
    color: rgba(168, 180, 255, 0.95);
    font-size: 14px;
}

.testimonial-quote {
    margin: 0;
    flex: 1;
    font-size: 15px;
    line-height: 1.65;
    color: rgba(237, 237, 239, 0.88);
}

.testimonial-author {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-top: auto;
    padding-top: 4px;
}

.testimonial-avatar {
    width: 44px;
    height: 44px;
    border-radius: 999px;
    object-fit: cover;
    border: 1px solid var(--border-default);
    flex-shrink: 0;
    background: rgba(255, 255, 255, 0.06);
}

.testimonial-name {
    font-weight: 700;
    font-size: 14px;
    color: rgba(237, 237, 239, 0.95);
}

.testimonial-role {
    font-size: 13px;
    color: rgba(237, 237, 239, 0.55);
    margin-top: 2px;
}

.text-primary {
    color: var(--accent);
}

.text-center {
    text-align: center;
}

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

.mt-4 {
    margin-top: 28px;
}

.grid {
    display: grid;
    gap: 24px;
}

.grid-2 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
}

.grid-3 {
    grid-template-columns: repeat(3, minmax(0, 1fr));
}

.grid-4 {
    grid-template-columns: repeat(4, minmax(0, 1fr));
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    border: 1px solid transparent;
    border-radius: var(--radius-sm);
    font-size: 15px;
    font-weight: 600;
    padding: 5px 20px;
    transition: transform var(--t-fast) var(--ease-expo-out), background var(--t-fast) var(--ease-expo-out), box-shadow var(--t-fast) var(--ease-expo-out), color var(--t-fast) var(--ease-expo-out), border-color var(--t-fast) var(--ease-expo-out);
    will-change: transform;
}

.btn-lg {
    padding: 13px 26px;
    font-size: 16px;
}

.btn-primary {
    position: relative;
    overflow: hidden;
    background: var(--accent);
    color: rgba(255,255,255,0.96);
    box-shadow: var(--shadow-accent);
}

.btn-primary::before {
    content: "";
    position: absolute;
    top: -60%;
    left: -40%;
    width: 55%;
    height: 220%;
    transform: translateX(-120%) rotate(18deg);
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.22), transparent);
    opacity: 0;
    pointer-events: none;
}

.btn-primary:hover {
    background: var(--accent-bright);
    transform: translateY(-1px);
    box-shadow: 0 0 0 1px rgba(94,106,210,0.42), 0 6px 18px rgba(0,0,0,0.28), 0 0 40px rgba(94,106,210,0.10), inset 0 1px 0 0 rgba(255,255,255,0.18);
}

.btn-primary:hover::before {
    opacity: 1;
    transition: transform 520ms var(--ease-expo-out), opacity 220ms var(--ease-expo-out);
    transform: translateX(320%) rotate(18deg);
}

.btn-primary:active {
    transform: scale(0.98);
}

.btn-outline {
    background: rgba(255,255,255,0.04);
    border-color: var(--border-default);
    color: var(--foreground);
    box-shadow: inset 0 1px 0 0 rgba(255,255,255,0.08);
}

.btn-outline:hover {
    border-color: var(--border-hover);
    background: rgba(255,255,255,0.06);
    color: var(--foreground);
}

.btn:focus-visible {
    outline: none;
    box-shadow: 0 0 0 2px rgba(94,106,210,0.55), 0 0 0 4px rgba(5,5,6,0.95);
}

.header {
    position: sticky;
    top: 0;
    z-index: 50;
    height: 72px;
    display: flex;
    align-items: center;
    background: rgba(5,5,6,0.70);
    backdrop-filter: blur(14px);
    border-bottom: 1px solid var(--border-default);
}

.header-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.header-left {
    display: flex;
    align-items: center;
    gap: 14px;
    min-width: 0;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 26px;
    font-weight: 700;
    letter-spacing: -0.01em;
    font-family: 'Courier New', Courier, monospace;
}

.logo-icon {
    color: var(--primary);
}

.logo-img {
    width: 35px;
    height: 35px;
    display: block;
    object-fit: contain;
}

.brand-tag {
    display: inline-flex;
    align-items: center;
    height: 30px;
    padding: 0 12px;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.08);
    color: rgba(237, 237, 239, 0.66);
    font-size: 12px;
    font-weight: 400;
    letter-spacing: 0.03em;
    white-space: nowrap;
    box-shadow: inset 0 1px 0 0 rgba(255,255,255,0.08);
}
.brand-tag i{
    margin-right: 5px;
}
@media (max-width: 1100px) {
    .header-left .brand-tag:not(.brand-tag--hero) {
        display: none;
    }
}

.nav {
    display: flex;
    gap: 40px;
}

.nav a {
    color: rgba(237, 237, 239, 0.72);
    font-size: 14px;
    font-weight: 400;
    transition: color var(--t-fast) var(--ease-expo-out);
    position: relative;
}

.nav a:hover {
    color: var(--foreground);
}

.nav a::after {
    content: "";
    position: absolute;
    left: 0;
    right: 0;
    bottom: -10px;
    height: 1px;
    opacity: 0;
    background: linear-gradient(to right, transparent, rgba(94,106,210,0.55), transparent);
    transition: opacity var(--t-fast) var(--ease-expo-out);
}

.nav a:hover::after {
    opacity: 1;
}

.mobile-menu-btn {
    display: none;
    border: 1px solid var(--border-default);
    background: rgba(255,255,255,0.04);
    width: 40px;
    height: 40px;
    border-radius: var(--radius-sm);
    color: var(--foreground);
    box-shadow: inset 0 1px 0 0 rgba(255,255,255,0.08);
    transition: background var(--t-fast) var(--ease-expo-out), border-color var(--t-fast) var(--ease-expo-out), transform var(--t-fast) var(--ease-expo-out);
}

.mobile-menu-btn:hover {
    background: rgba(255,255,255,0.06);
    border-color: var(--border-hover);
}

.mobile-nav {
    position: absolute;
    left: 0;
    right: 0;
    top: 72px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-8px);
    transition: opacity var(--t-base) var(--ease-expo-out), transform var(--t-base) var(--ease-expo-out), visibility var(--t-base) var(--ease-expo-out);
    background: rgba(5,5,6,0.92);
    border-bottom: 1px solid var(--border-default);
    backdrop-filter: blur(18px);
    box-shadow: 0 24px 60px rgba(0,0,0,0.45);
}

body.mobile-nav-open .mobile-nav {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.mobile-nav-inner {
    padding: 14px 0 18px;
    display: grid;
    gap: 14px;
    width: 100%;
}

.mobile-nav-links {
    display: grid;
    gap: 8px;
    width: 100%;
}

.mobile-nav-links a {
    display: flex;
    align-items: center;
    gap: 10px;
    width: 100%;
    min-height: 46px;
    padding: 12px 14px;
    border-radius: 12px;
    color: var(--foreground);
    background: rgba(255,255,255,0.03);
    border: 1px solid rgba(255,255,255,0.05);
    box-shadow: inset 0 1px 0 0 rgba(255,255,255,0.06);
    transition: background var(--t-fast) var(--ease-expo-out), border-color var(--t-fast) var(--ease-expo-out), transform var(--t-fast) var(--ease-expo-out);
}

.mobile-nav-links a:hover {
    background: rgba(255,255,255,0.06);
    border-color: rgba(255,255,255,0.10);
    transform: translateY(-1px);
}

.mobile-nav-cta {
    width: 100%;
    min-height: 48px;
    border-radius: 12px;
}




.card, .case-card, .benefit-item, .knowledge-card, .pricing-container, .faq-container {
    background: linear-gradient(to bottom, rgba(255,255,255,0.08), rgba(255,255,255,0.02));
    border: 1px solid var(--border-default);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-card);
    position: relative;
    overflow: hidden;
    transition: transform var(--t-base) var(--ease-expo-out), box-shadow var(--t-base) var(--ease-expo-out), border-color var(--t-base) var(--ease-expo-out), background var(--t-base) var(--ease-expo-out);
}

.card::after,
.case-card::after,
.benefit-item::after,
.knowledge-card::after,
.pricing-container::after,
.faq-container::after {
    content: "";
    position: absolute;
    inset: 0;
    padding: 1px;
    border-radius: inherit;
    background: linear-gradient(to bottom, rgba(94,106,210,0.32), rgba(255,255,255,0.10) 35%, transparent 70%);
    opacity: 0;
    pointer-events: none;
    -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
    -webkit-mask-composite: xor;
    mask-composite: exclude;
    transition: opacity var(--t-base) var(--ease-expo-out);
}

.card:hover::after,
.case-card:hover::after,
.benefit-item:hover::after,
.knowledge-card:hover::after,
.pricing-container:hover::after,
.faq-container:hover::after {
    opacity: 1;
}

.card::before,
.case-card::before,
.benefit-item::before,
.knowledge-card::before,
.pricing-container::before,
.faq-container::before {
    content: "";
    position: absolute;
    left: 14px;
    right: 14px;
    top: 0;
    height: 1px;
    background: linear-gradient(to right, transparent, rgba(255,255,255,0.14), transparent);
    opacity: 0.7;
    pointer-events: none;
}

.card {
    padding: 24px;
}

.card:hover,
.case-card:hover,
.benefit-item:hover,
.knowledge-card:hover,
.pricing-container:hover {
    border-color: var(--border-hover);
    box-shadow: var(--shadow-card-hover);
    transform: translateY(-4px);
}

.spotlight > * {
    position: relative;
    z-index: 1;
}

.spotlight .spotlight-layer {
    position: absolute;
    inset: -1px;
    opacity: 0;
    transition: opacity var(--t-base) var(--ease-expo-out);
    background: radial-gradient(300px circle at var(--mx, 50%) var(--my, 50%), rgba(94,106,210,0.15), transparent 60%);
    pointer-events: none;
    z-index: 0;
}

.spotlight:hover .spotlight-layer {
    opacity: 1;
}

.reveal-on-scroll {
    opacity: 0;
    transform: translate3d(0, 14px, 0) scale(0.99);
    filter: blur(6px);
    transition:
        opacity 700ms var(--ease-expo-out),
        transform 700ms var(--ease-expo-out),
        filter 700ms var(--ease-expo-out);
    transition-delay: var(--reveal-delay, 0ms);
    will-change: opacity, transform, filter;
}

.reveal-on-scroll.in-view {
    opacity: 1;
    transform: translate3d(0, 0, 0) scale(1);
    filter: blur(0px);
}






.footer {
    margin-top: 60px;
    background: #020203;
    color: rgba(237,237,239,0.86);
    padding: 64px 0 20px;
    border-top: 1px solid var(--border-default);
}

.footer-top {
    display: flex;
    justify-content: space-between;
    gap: 24px;
    margin-bottom: 26px;
}
.footer-desc{
    margin-top:10px;
    color: rgba(237,237,239,0.60);
    font-size: 14px;
}
.footer-text {
    color: rgba(237,237,239,0.40);
    font-size: 14px;
    margin-top: 8px;
}
.footer-text i{
    width: 30px;
    height: 30px;
    border-radius: 15px;
    background: rgba(255,255,255,0.06);
    border: 1px solid var(--border-default);
    text-align: center;
    line-height: 30px;
    margin-right: 5px;
}


.footer-qrs {
    display: flex;
    gap: 30px;
}

.qr-item {
    text-align: center;
}

.qr-item h4 {
    color: rgba(237,237,239,0.92);
    font-size: 18px;
}

.qr-item p {
    color: rgba(237,237,239,0.60);
    font-size: 14px;
}

.qr-img {
    margin-top: 8px;
    width: 120px;
    height: 120px;
    border-radius: 10px;
    background: rgba(255,255,255,0.03);
    border: 1px solid var(--border-default);
    color: rgba(237,237,239,0.90);
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.qr-img img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    display: block;
}

.footer-bottom {
    border-top: 1px solid rgba(255,255,255,0.06);
    padding-top: 16px;
    text-align: center;
    font-size: 12px;
    color: rgba(237,237,239,0.30);
}

.floating-tools {
    position: fixed;
    right: 16px;
    bottom: 16px;
    display: grid;
    gap: 8px;
    z-index: 20;
}

.tool-btn {
    width: 56px;
    height: 56px;
    border-radius: 10px;
    border: 1px solid var(--border-default);
    background: rgba(255,255,255,0.04);
    box-shadow: var(--shadow-card);
    color: var(--foreground-muted);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    font-weight: 400;
    transition: background var(--t-fast) var(--ease-expo-out), border-color var(--t-fast) var(--ease-expo-out), transform var(--t-fast) var(--ease-expo-out), box-shadow var(--t-fast) var(--ease-expo-out), color var(--t-fast) var(--ease-expo-out);
}

.tool-btn i {
    font-size: 16px;
    margin-bottom: 4px;
}

.tool-btn:hover {
    color: var(--foreground);
    background: rgba(255,255,255,0.06);
    border-color: var(--border-hover);
    box-shadow: var(--shadow-card-hover);
    transform: translateY(-2px);
}

.back-to-top {
    opacity: 0;
    visibility: hidden;
    transform: translateY(8px);
    transition: .2s ease;
}

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

.modal {
    position: fixed;
    inset: 0;
    z-index: 999;
    display: none;
}

.modal.is-open {
    display: block;
}

.modal.is-open .modal-panel {
    animation: modal-in 280ms var(--ease-expo-out) both;
}

@keyframes modal-in {
    from { opacity: 0; transform: translate3d(-50%, calc(-50% + 10px), 0) scale(0.985); filter: blur(6px); }
    to { opacity: 1; transform: translate3d(-50%, -50%, 0) scale(1); filter: blur(0px); }
}

.modal.is-open .modal-overlay {
    animation: modal-overlay-in 220ms var(--ease-expo-out) both;
}

@keyframes modal-overlay-in {
    from { opacity: 0; }
    to { opacity: 1; }
}

.modal-overlay {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.62);
    backdrop-filter: blur(14px);
}

.modal-panel {
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate3d(-50%, -50%, 0);
    width: min(700px, calc((100vw - 56px) * 0.7));
    max-height: min(78vh, 780px);
    overflow: hidden;
    background: linear-gradient(to bottom, rgba(255,255,255,0.08), rgba(255,255,255,0.02));
    color: var(--foreground);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-default);
    box-shadow: var(--shadow-card-hover);
    backdrop-filter: blur(18px);
}

.modal-panel--wechat {
    width: min(340px, calc(100vw - 40px));
    max-height: none;
    padding: 0;
    overflow: visible;
    text-align: center;
    background: linear-gradient(to bottom, rgba(255, 255, 255, 0.08), rgba(255, 255, 255, 0.02));
    box-shadow: var(--shadow-card-hover);
    backdrop-filter: blur(18px);
}

.modal-close--floating {
    position: absolute;
    top: 12px;
    right: 12px;
    z-index: 2;
}

.modal-wechat-body {
    padding: 28px 22px 30px;
    padding-top: 22px;
}

.modal-wechat-title {
    font-size: 22px;
    font-weight: 800;
    letter-spacing: -0.02em;
    margin: 0 0 10px;
}

.modal-wechat-desc {
    margin: 0 0 22px;
    color: rgba(237, 237, 239, 0.66);
    font-size: 14px;
    line-height: 1.65;
    padding: 0 20px;
    text-align: center;
}

.modal-wechat-qr {
    margin: 0 auto;
    width: 200px;
    height: 200px;
    box-shadow: 0 10px 32px rgba(0, 0, 0, 0.35);
}

.modal-wechat-qr img {
    width: 100%;
    height: 100%;
    border-radius: 10px;
    object-fit: contain;
    display: block;
}

.modal-header {
    height: 72px;
    padding: 18px 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    border-bottom: 1px solid var(--border-default);
}

.modal-title {
    font-size: 20px;
    font-weight: 800;
    letter-spacing: -0.01em;
}

.modal-close {
    width: 40px;
    height: 40px;
    border-radius: 10px;
    border: 1px solid var(--border-default);
    background: rgba(255,255,255,0.04);
    color: rgba(237,237,239,0.78);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: transform var(--t-fast) var(--ease-expo-out), background var(--t-fast) var(--ease-expo-out), color var(--t-fast) var(--ease-expo-out);
}

.modal-close:hover {
    background: rgba(255,255,255,0.06);
    color: rgba(237,237,239,0.92);
    transform: translateY(-1px);
}

.modal-body {
    padding: 18px 20px 22px;
    overflow: auto;
    max-height: calc(min(78vh, 780px) - 72px);
    -webkit-overflow-scrolling: touch;
    scrollbar-width: thin;
    scrollbar-color: var(--scrollbar-thumb) var(--scrollbar-track);
}

.modal-body::-webkit-scrollbar {
    width: var(--scrollbar-size);
    height: var(--scrollbar-size);
}

.modal-body::-webkit-scrollbar-track {
    background: var(--scrollbar-track);
    border-radius: 999px;
    border-left: 1px solid rgba(0, 0, 0, 0.35);
}

.modal-body::-webkit-scrollbar-thumb {
    background: var(--scrollbar-thumb);
    border-radius: 999px;
    border: 2px solid var(--scrollbar-track);
    background-clip: padding-box;
}

.modal-body::-webkit-scrollbar-thumb:hover {
    background: var(--scrollbar-thumb-hover);
}

.modal-body::-webkit-scrollbar-corner {
    background: var(--scrollbar-track);
}

.modal-body::-webkit-scrollbar-button:single-button:vertical:decrement,
.modal-body::-webkit-scrollbar-button:vertical:start:decrement {
    display: block;
    height: calc(var(--scrollbar-size) + 4px);
    width: var(--scrollbar-size);
    background-color: var(--scrollbar-button-bg);
    border-radius: 999px 999px 3px 3px;
    background-repeat: no-repeat;
    background-position: center;
    background-size: 8px 5px;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='8' height='5' viewBox='0 0 8 5'%3E%3Cpath fill='%23c8c8c8' d='M4%200%20L8%205%20L0%205Z'/%3E%3C/svg%3E");
}

.modal-body::-webkit-scrollbar-button:single-button:vertical:increment,
.modal-body::-webkit-scrollbar-button:vertical:end:increment {
    display: block;
    height: calc(var(--scrollbar-size) + 4px);
    width: var(--scrollbar-size);
    background-color: var(--scrollbar-button-bg);
    border-radius: 3px 3px 999px 999px;
    background-repeat: no-repeat;
    background-position: center;
    background-size: 8px 5px;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='8' height='5' viewBox='0 0 8 5'%3E%3Cpath fill='%23c8c8c8' d='M4%205%20L0%200%20L8%200Z'/%3E%3C/svg%3E");
    box-shadow: inset 2px 0 0 0 var(--scrollbar-accent);
}

.skill-list {
    list-style: none;
    margin: 0;
    padding: 0;
    display: grid;
    gap: 16px;
}

.skill-list-item {
    margin: 0;
    padding: 0;
}

.skill-card {
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid var(--border-default);
    border-radius: var(--radius-md);
    padding: 18px 18px 16px;
    box-shadow: inset 0 1px 0 0 rgba(255, 255, 255, 0.06);
}

.skill-card-head {
    margin: 0;
    padding: 0;
}

.skill-card-name {
    margin: 0;
    font-family: Georgia,Cambria,serif,"Courier New";
    font-size: 20px;
    font-weight: 700;
    letter-spacing: -0.02em;
    line-height: 1.25;
    color: var(--foreground);
    word-break: break-word;
}

.skill-card-type {
    margin: 8px 0 0;
    padding: 0;
    display: flex;
    align-items: flex-start;
    gap: 8px;
    font-size: 14px;
    font-weight: 700;
    line-height: 1.45;
    color: rgba(237, 237, 239, 0.8);
}

.skill-card-type::before {
    content: "";
    flex-shrink: 0;
    width: 6px;
    height: 6px;
    margin-top: 0.4em;
    border-radius: 50%;
    background: var(--primary);
}

.skill-card-desc {
    margin: 14px 0 0;
    padding: 0;
    color: rgba(237, 237, 239, 0.7);
    font-size: 14px;
    line-height: 1.62;
}

.skill-card-tags {
    margin-top: 16px;
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.skill-tag {
    display: inline-flex;
    align-items: center;
    height: 30px;
    padding: 0 12px;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid var(--border-default);
    color: rgba(237, 237, 239, 0.74);
    font-size: 12px;
    font-weight: 400;
}

body.modal-open {
    overflow: hidden;
}

html.modal-open {
    overflow: hidden;
}

@media (max-width: 1024px) {
    .grid-3,
    .grid-4 {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .testimonial-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

}

@media (max-width: 768px) {
    .floating-tools {
        display: none !important;
    }

    .nav,
    .header-actions {
        display: none;
    }

    .mobile-menu-btn {
        display: inline-flex;
        align-items: center;
        justify-content: center;
    }

    .mobile-nav {
        top: 72px;
        max-height: calc(100vh - 72px);
        overflow-y: auto;
    }

    .mobile-nav-inner {
        padding: 12px 10px 16px;
        gap: 12px;
    }

    .mobile-nav-links a {
        font-size: 16px;
        font-weight: 400;
    }

    .mobile-nav-cta {
        font-size: 20px;
        font-weight: 800;
        min-height: 52px;
    }


    .grid-2,
    .grid-3,
    .grid-4 {
        grid-template-columns: 1fr;
    }

    .testimonial-grid {
        grid-template-columns: 1fr;
    }


    .footer-top {
        flex-direction: column;
    }

    .footer-qrs {
        width: 100%;
        justify-content: center;
        align-items: center;
        gap: 16px;
    }

    .qr-item {
        display: flex;
        flex-direction: column;
        align-items: center;
    }

    .modal-panel {
        width: calc(100vw - 28px);
        max-height: 86vh;
    }

    .modal-header {
        height: 64px;
        padding: 14px 14px;
    }

    .modal-body {
        padding: 14px 14px 18px;
        max-height: calc(86vh - 64px);
    }

    .skill-card-name {
        font-size: 16px;
    }
}

@media (prefers-reduced-motion: reduce) {
    .btn,
    .card, .case-card, .benefit-item, .knowledge-card, .pricing-container,
    .tool-btn,
    .mobile-nav {
        transition: none !important;
    }


    .reveal-on-scroll {
        opacity: 1 !important;
        transform: none !important;
        filter: none !important;
    }




    .modal.is-open .modal-panel,
    .modal.is-open .modal-overlay {
        animation: none !important;
    }
}