/* ============================================
   SecureCRT 中文官网 - 公共样式 v2
   主题色: #383838 (深灰) #194484 (深蓝)
   设计语言: Cinematic Dark · Glassmorphism
   ============================================ */

/* ----- CSS 变量 ----- */
:root {
    --bg-base: #0a0a14;
    --bg-elevated: #0f0f1e;
    --bg-card: rgba(15, 15, 35, 0.6);
    --bg-card-hover: rgba(20, 20, 45, 0.8);
    --bg-glass: rgba(255, 255, 255, 0.03);
    --bg-glass-strong: rgba(255, 255, 255, 0.06);

    --color-primary: #194484;
    --color-primary-bright: #3b7ddd;
    --color-primary-glow: rgba(25, 68, 132, 0.35);
    --color-accent: #38bdf8;
    --color-accent-2: #818cf8;
    --color-cyan: #22d3ee;
    --color-green: #34d399;
    --color-gray: #383838;

    --text-primary: #f0f0f5;
    --text-secondary: #94a3b8;
    --text-tertiary: #64748b;
    --text-ghost: #475569;

    --border-subtle: rgba(255, 255, 255, 0.06);
    --border-medium: rgba(255, 255, 255, 0.1);
    --border-accent: rgba(59, 125, 221, 0.3);

    --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Helvetica, Arial, sans-serif;
    --font-mono: "SF Mono", "Fira Code", "Cascadia Code", "JetBrains Mono", "Courier New", monospace;

    --radius-xs: 4px;
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 20px;
    --radius-2xl: 28px;
    --radius-full: 9999px;

    --ease-out-expo: cubic-bezier(0.16, 1, 0.3, 1);
    --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
    --duration-fast: 150ms;
    --duration-normal: 250ms;
    --duration-slow: 500ms;
}

/* ----- 重置与基础 ----- */
*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    -webkit-text-size-adjust: 100%;
    text-size-adjust: 100%;
}

body {
    font-family: var(--font-sans);
    font-size: 16px;
    line-height: 1.7;
    color: var(--text-secondary);
    background-color: var(--bg-base);
    overflow-x: hidden;
    position: relative;
}

/* 全局点阵背景 */
body::before {
    content: '';
    position: fixed;
    inset: 0;
    background-image:
        radial-gradient(circle at 1px 1px, rgba(255,255,255,0.03) 1px, transparent 0);
    background-size: 32px 32px;
    pointer-events: none;
    z-index: 0;
}

/* 顶部氛围光 */
body::after {
    content: '';
    position: fixed;
    top: -40%;
    left: 50%;
    transform: translateX(-50%);
    width: 120%;
    height: 70%;
    background: radial-gradient(ellipse at center, rgba(25, 68, 132, 0.12) 0%, rgba(56, 189, 248, 0.04) 40%, transparent 70%);
    pointer-events: none;
    z-index: 0;
}

a {
    color: var(--color-accent);
    text-decoration: none;
    transition: color var(--duration-fast) var(--ease-out-expo);
}

a:hover {
    color: var(--color-primary-bright);
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

/* ----- 通用容器 ----- */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 32px;
    position: relative;
    z-index: 1;
}

/* ----- 通用按钮 ----- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 11px 24px;
    border: none;
    border-radius: var(--radius-sm);
    font-family: var(--font-sans);
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--duration-normal) var(--ease-out-expo);
    text-decoration: none;
    white-space: nowrap;
    position: relative;
    overflow: hidden;
}

.btn svg {
    width: 16px;
    height: 16px;
    flex-shrink: 0;
}

.btn-primary {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-bright) 100%);
    color: #fff;
    box-shadow: 0 0 0 1px rgba(59, 125, 221, 0.3), 0 4px 16px rgba(25, 68, 132, 0.35);
}

.btn-primary::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(255,255,255,0.1) 0%, transparent 50%);
    opacity: 0;
    transition: opacity var(--duration-normal);
}

.btn-primary:hover {
    box-shadow: 0 0 0 1px rgba(59, 125, 221, 0.5), 0 8px 30px rgba(25, 68, 132, 0.5);
    transform: translateY(-1px);
    color: #fff;
}

.btn-primary:hover::before {
    opacity: 1;
}

.btn-outline {
    background: var(--bg-glass);
    color: var(--text-secondary);
    border: 1px solid var(--border-subtle);
}

.btn-outline:hover {
    border-color: var(--border-accent);
    color: var(--text-primary);
    background: var(--bg-glass-strong);
    transform: translateY(-1px);
}

/* ----- 通用动画 ----- */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(24px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(40px) scale(0.98);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

@keyframes shimmer {
    0% { background-position: -200% 0; }
    100% { background-position: 200% 0; }
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-8px); }
}

@keyframes terminalBlink {
    0%, 100% { opacity: 1; }
    50% { opacity: 0; }
}

@keyframes scanline {
    0% { transform: translateY(-100%); }
    100% { transform: translateY(100vh); }
}

@keyframes borderGlow {
    0%, 100% { border-color: var(--border-subtle); }
    50% { border-color: var(--border-accent); }
}

.fade-in-up {
    animation: fadeInUp 0.6s var(--ease-out-expo) both;
}

.fade-in {
    animation: fadeIn 0.5s var(--ease-out-expo) both;
}

/* ----- 滚动触发动画 ----- */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.7s var(--ease-out-expo), transform 0.7s var(--ease-out-expo);
}

.reveal.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ----- 滚动条样式 ----- */
::-webkit-scrollbar {
    width: 6px;
}

::-webkit-scrollbar-track {
    background: transparent;
}

::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.08);
    border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
    background: rgba(255, 255, 255, 0.15);
}

/* ----- 响应式断点 ----- */
@media (max-width: 768px) {
    .container {
        padding: 0 20px;
    }

    body {
        font-size: 15px;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 16px;
    }

    body {
        font-size: 14px;
    }
}

/* ============================================
   导航栏 Navigation
   ============================================ */
.site-nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: transparent;
    transition: background var(--duration-normal) var(--ease-out-expo),
                box-shadow var(--duration-normal) var(--ease-out-expo);
}

.site-nav.scrolled {
    background: rgba(10, 10, 20, 0.85);
    -webkit-backdrop-filter: blur(16px) saturate(1.4);
    backdrop-filter: blur(16px) saturate(1.4);
    box-shadow: 0 1px 0 var(--border-subtle), 0 8px 32px rgba(0,0,0,0.3);
}

.nav-inner {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 32px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 64px;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    flex-shrink: 0;
}

.nav-logo {
    width: 39px;
    height: 39px;
    object-fit: contain;
}

.nav-brand-info {
    display: flex;
    flex-direction: column;
    line-height: 1.15;
}

.nav-brand-name {
    font-size: 16px;
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: 0.3px;
}

.nav-brand-sub {
    font-size: 10px;
    color: var(--text-tertiary);
    letter-spacing: 0.2px;
}

.nav-center {
    display: flex;
    align-items: center;
    gap: 4px;
}

.nav-item {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 14px;
    font-size: 13px;
    font-weight: 500;
    color: var(--text-tertiary);
    text-decoration: none;
    border-radius: var(--radius-sm);
    transition: all var(--duration-fast) var(--ease-out-expo);
}

.nav-item:hover {
    color: var(--text-primary);
    background: var(--bg-glass-strong);
}

.nav-item.active {
    color: var(--color-accent);
}

.nav-item-dot {
    width: 5px;
    height: 5px;
    border-radius: 50%;
    background: var(--color-accent);
    opacity: 0;
    transition: opacity var(--duration-fast);
}

.nav-item.active .nav-item-dot {
    opacity: 1;
}

.nav-right {
    display: flex;
    align-items: center;
    gap: 8px;
}

.btn-nav {
    font-size: 12px;
    padding: 7px 16px;
}

/* 汉堡菜单 */
.nav-toggle {
    display: none;
    width: 32px;
    height: 32px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 6px;
    flex-direction: column;
    justify-content: center;
    gap: 4px;
    border-radius: var(--radius-xs);
}

.nav-toggle span {
    display: block;
    width: 100%;
    height: 1.5px;
    background: var(--text-secondary);
    border-radius: 2px;
    transition: all var(--duration-normal) var(--ease-out-expo);
    transform-origin: center;
}

.nav-toggle.open span:nth-child(1) {
    transform: rotate(45deg) translate(3.5px, 3.5px);
}

.nav-toggle.open span:nth-child(2) {
    opacity: 0;
    transform: scaleX(0);
}

.nav-toggle.open span:nth-child(3) {
    transform: rotate(-45deg) translate(4px, -4px);
}

.nav-spacer {
    height: 64px;
}

/* 移动端面板 */
.nav-mobile-panel {
    position: fixed;
    top: 64px;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 999;
    background: rgba(10, 10, 20, 0.96);
    -webkit-backdrop-filter: blur(24px);
    backdrop-filter: blur(24px);
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--duration-normal) var(--ease-out-expo),
                visibility var(--duration-normal);
}

.nav-mobile-panel.open {
    opacity: 1;
    visibility: visible;
}

.nav-mobile-body {
    display: flex;
    flex-direction: column;
    padding: 32px 24px;
    gap: 8px;
    height: 100%;
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
    padding-bottom: 60px;
}

.nav-mobile-link {
    display: block;
    padding: 14px 16px;
    font-size: 16px;
    font-weight: 500;
    color: var(--text-secondary);
    text-decoration: none;
    border-radius: var(--radius-sm);
    transition: all var(--duration-fast);
}

.nav-mobile-link:hover,
.nav-mobile-link.active {
    color: var(--text-primary);
    background: var(--bg-glass-strong);
}

.nav-mobile-divider {
    height: 1px;
    background: var(--border-subtle);
    margin: 12px 0;
}

.nav-mobile-btn {
    width: 100%;
    justify-content: center;
    padding: 14px 24px;
    font-size: 15px;
}

/* ----- 产品下拉菜单 ----- */
.nav-item-wrap {
    position: relative;
}

.nav-has-dropdown > .nav-item {
    cursor: pointer;
}

.nav-chevron {
    width: 14px;
    height: 14px;
    margin-left: 2px;
    opacity: 0.4;
    transition: transform var(--duration-normal) var(--ease-out-expo), opacity var(--duration-fast);
    vertical-align: middle;
}

.nav-has-dropdown.open > .nav-item .nav-chevron {
    transform: rotate(180deg);
    opacity: 0.7;
}

.nav-dropdown {
    position: absolute;
    top: calc(100% + 8px);
    left: 50%;
    transform: translateX(-50%) translateY(6px);
    min-width: 300px;
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: opacity var(--duration-normal) var(--ease-out-expo),
                transform var(--duration-normal) var(--ease-out-expo),
                visibility var(--duration-normal);
    z-index: 100;
}

.nav-has-dropdown.open .nav-dropdown {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    transform: translateX(-50%) translateY(0);
}

.nav-dropdown-inner {
    background: rgba(15, 15, 30, 0.95);
    -webkit-backdrop-filter: blur(20px) saturate(1.4);
    backdrop-filter: blur(20px) saturate(1.4);
    border: 1px solid var(--border-medium);
    border-radius: var(--radius-lg);
    padding: 8px;
    box-shadow: 0 16px 48px rgba(0, 0, 0, 0.4), 0 0 0 1px rgba(255, 255, 255, 0.04) inset;
}

.nav-dd-item {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 12px 16px;
    border-radius: var(--radius-md);
    text-decoration: none;
    transition: background var(--duration-fast) var(--ease-out-expo);
    color: var(--text-secondary);
}

.nav-dd-item:hover {
    background: var(--bg-glass-strong);
    color: var(--text-primary);
}

.nav-dd-item + .nav-dd-item {
    margin-top: 2px;
}

.nav-dd-icon {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.nav-dd-icon img {
    width: 32px;
    height: 32px;
    object-fit: contain;
    border-radius: 6px;
}

.nav-dd-info {
    display: flex;
    flex-direction: column;
    gap: 2px;
    flex: 1;
    min-width: 0;
}

.nav-dd-name {
    font-size: 13px;
    font-weight: 600;
    color: var(--text-primary);
    line-height: 1.3;
}

.nav-dd-desc {
    font-size: 11px;
    color: var(--text-ghost);
    line-height: 1.3;
}

.nav-dd-item:hover .nav-dd-desc {
    color: var(--text-tertiary);
}

.nav-dd-badge {
    font-size: 10px;
    font-weight: 600;
    color: var(--color-primary-bright);
    background: rgba(59, 125, 221, 0.1);
    border: 1px solid rgba(59, 125, 221, 0.2);
    padding: 2px 8px;
    border-radius: var(--radius-full);
    flex-shrink: 0;
    letter-spacing: 0.3px;
}

.nav-dd-current {
    background: rgba(59, 125, 221, 0.04);
}

.nav-dd-external {
    width: 14px;
    height: 14px;
    opacity: 0.2;
    flex-shrink: 0;
    transition: opacity var(--duration-fast);
}

.nav-dd-item:hover .nav-dd-external {
    opacity: 0.5;
}

/* Compact dropdown (平台/支持) */
.nav-dd-compact {
    min-width: 180px;
}

.nav-dd-link {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 9px 14px;
    font-size: 13px;
    font-weight: 500;
    color: var(--text-secondary);
    text-decoration: none;
    border-radius: var(--radius-sm);
    transition: all var(--duration-fast) var(--ease-out-expo);
    white-space: nowrap;
}

.nav-dd-link:hover {
    background: var(--bg-glass-strong);
    color: var(--text-primary);
}

.nav-dd-link.active {
    color: var(--color-accent);
}

.nav-dd-os {
    width: 16px;
    height: 16px;
    object-fit: contain;
    opacity: 0.5;
    filter: brightness(0) invert(0.7);
}

.nav-dd-link:hover .nav-dd-os {
    opacity: 0.8;
}

.nav-dd-os-svg {
    width: 16px;
    height: 16px;
    opacity: 0.4;
    flex-shrink: 0;
}

.nav-dd-link:hover .nav-dd-os-svg {
    opacity: 0.7;
}

.nav-dd-sep {
    height: 1px;
    background: var(--border-subtle);
    margin: 4px 8px;
}

/* Mobile external link icon */
.nav-dd-external-m {
    width: 12px;
    height: 12px;
    margin-left: 6px;
    opacity: 0.3;
    vertical-align: middle;
    display: inline;
}

/* Mobile group title */
.nav-mobile-group-title {
    font-size: 11px;
    font-weight: 600;
    color: var(--text-ghost);
    text-transform: uppercase;
    letter-spacing: 1.5px;
    padding: 8px 16px 4px;
    font-family: var(--font-mono);
}

@media (max-width: 768px) {
    .nav-inner {
        padding: 0 20px;
    }

    .nav-center,
    .nav-right {
        display: none;
    }

    .nav-toggle {
        display: flex;
    }
}

/* ============================================
   页脚 Footer
   ============================================ */
footer {
    position: relative;
    z-index: 1;
    border-top: 1px solid var(--border-subtle);
}

.footer-wrap {
    padding: 40px 0 28px;
}

.footer-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 32px;
}

.footer-main {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 32px;
}

.footer-left {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.footer-product-logos {
    display: flex;
    align-items: center;
    gap: 12px;
}

.footer-plogo {
    width: 26px;
    height: 26px;
    object-fit: contain;
    opacity: 0.5;
    transition: opacity var(--duration-fast);
}

.footer-plogo:hover {
    opacity: 0.9;
}

.footer-copyright {
    font-size: 13px;
    color: var(--text-tertiary);
}

.footer-right {
    display: flex;
    align-items: center;
    gap: 24px;
}

.footer-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 12px;
    color: var(--text-tertiary);
    text-decoration: none;
    transition: color var(--duration-fast);
}

.footer-link:hover {
    color: var(--text-secondary);
}

.footer-link svg {
    flex-shrink: 0;
    opacity: 0.5;
}

.footer-line {
    height: 1px;
    background: var(--border-subtle);
    margin: 24px 0 16px;
}

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

.footer-legal p {
    font-size: 11px;
    color: var(--text-ghost);
    line-height: 1.8;
}

.footer-legal-en {
    margin-top: 2px;
    opacity: 0.6;
}

@media (max-width: 768px) {
    .footer-container {
        padding: 0 20px;
    }

    .footer-main {
        flex-direction: column;
        align-items: center;
        text-align: center;
        gap: 20px;
    }

    .footer-left {
        align-items: center;
    }

    .footer-right {
        flex-direction: column;
        gap: 12px;
    }
}

/* ============================================
   Section 通用标题组件
   ============================================ */
.sec-label {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-family: var(--font-mono);
    font-size: 11px;
    font-weight: 600;
    color: var(--color-accent);
    text-transform: uppercase;
    letter-spacing: 2px;
    margin-bottom: 12px;
}

.sec-label::before {
    content: '';
    width: 8px;
    height: 8px;
    border: 1.5px solid var(--color-accent);
    border-radius: 2px;
}

.sec-heading {
    font-size: 38px;
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: -0.5px;
    line-height: 1.2;
    margin-bottom: 12px;
}

.sec-desc {
    font-size: 15px;
    color: var(--text-tertiary);
    max-width: 520px;
}

.sec-header {
    text-align: center;
    margin-bottom: 56px;
}

.sec-header .sec-desc {
    margin: 0 auto;
}

@media (max-width: 768px) {
    .sec-heading {
        font-size: 26px;
    }
}

/* ============================================
   Bento 卡片网格
   ============================================ */
.bento {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
}

.bento-card {
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    padding: 28px 24px;
    transition: all var(--duration-normal) var(--ease-out-expo);
    position: relative;
    overflow: hidden;
}

.bento-card::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--color-primary-bright), transparent);
    opacity: 0;
    transition: opacity var(--duration-normal);
}

.bento-card:hover {
    border-color: var(--border-accent);
    background: var(--bg-card-hover);
    transform: translateY(-2px);
}

.bento-card:hover::after {
    opacity: 1;
}

.bento-icon {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(25, 68, 132, 0.12);
    border: 1px solid rgba(59, 125, 221, 0.15);
    border-radius: var(--radius-sm);
    margin-bottom: 16px;
    color: var(--color-primary-bright);
}

.bento-icon svg {
    width: 20px;
    height: 20px;
}

.bento-title {
    font-size: 15px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 8px;
    line-height: 1.4;
}

.bento-desc {
    font-size: 13px;
    line-height: 1.8;
    color: var(--text-tertiary);
}

@media (max-width: 900px) {
    .bento {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 600px) {
    .bento {
        grid-template-columns: 1fr;
    }
}

/* ============================================
   CTA 通用样式
   ============================================ */
.cta {
    position: relative;
    z-index: 1;
    padding: 80px 0 100px;
}

.cta-card {
    max-width: 740px;
    margin: 0 auto;
    text-align: center;
    padding: 56px 48px;
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-xl);
    position: relative;
    overflow: hidden;
}

.cta-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--color-primary-bright), transparent);
}

.cta-glow {
    position: absolute;
    top: -60%;
    left: 50%;
    transform: translateX(-50%);
    width: 400px;
    height: 300px;
    background: radial-gradient(ellipse at center, rgba(25, 68, 132, 0.15) 0%, transparent 70%);
    pointer-events: none;
}

.cta-card h2 {
    font-size: 28px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 12px;
    position: relative;
}

.cta-card p {
    font-size: 15px;
    color: var(--text-tertiary);
    margin-bottom: 32px;
    line-height: 1.8;
    position: relative;
}

.cta-btns {
    display: flex;
    justify-content: center;
    gap: 12px;
    position: relative;
}

.cta-btns .btn {
    padding: 13px 28px;
    font-size: 14px;
}

@media (max-width: 600px) {
    .cta-card {
        padding: 40px 24px;
    }

    .cta-card h2 {
        font-size: 22px;
    }

    .cta-btns {
        flex-direction: column;
        align-items: center;
    }

    .cta-btns .btn {
        width: 100%;
    }
}