.header{position:fixed;top:0;left:0;right:0;z-index:var(--z-index-header);height:var(--header-height);transition:var(--transition-all)}.header--menu-open{z-index:var(--z-index-modal)}.header--menu-open .header__container{position:relative;z-index:calc(var(--z-index-modal) + 2)}.header__container{width:100%;height:100%;padding:0 clamp(1.25rem,2.4vw,3rem);display:flex;align-items:center;justify-content:flex-start;background-color:var(--current-bg);backdrop-filter:none;-webkit-backdrop-filter:none;border-bottom:none}.header--scrolled .header__container{box-shadow:var(--shadow-lg)}.header__brand{display:flex;align-items:center;margin-left:-.5rem;flex:0 0 auto}.header__brand-link{display:flex;align-items:center;text-decoration:none;color:inherit;transition:var(--transition-all)}.header__brand-link:hover{transform:translateY(-1px)}.header__logo{width:3rem;height:3rem;border-radius:var(--border-radius-md);background:transparent;display:flex;align-items:center;justify-content:center;position:relative;overflow:hidden;flex-shrink:0}.header__logo img,.header__logo-image{width:100%;height:100%;-o-object-fit:contain;object-fit:contain;-o-object-position:center;object-position:center;display:block}:root[data-theme=light] .header__logo{background:transparent}.header__brand-text{display:flex;flex-direction:column;line-height:1.2;text-align:left;margin-left:var(--spacing-3);justify-content:center}.header__brand-main{font-size:var(--font-size-xl);color:var(--current-text-primary);letter-spacing:.1em}.header__brand-main,.header__brand-sub{font-weight:400;font-family:"ChuangkitDiamond",var(--font-family-chinese),sans-serif;transition:var(--transition-colors);text-align:left;margin:0;padding:0;white-space:nowrap}.header__brand-sub{font-size:.8rem;color:var(--current-text-secondary);letter-spacing:.05em}.header__brand-sub i{display:inline-block;width:3px;height:3px;margin:0 .38rem;border-radius:50%;background:var(--color-primary);vertical-align:middle}.header--english .header__brand-text{min-width:9.5rem;margin-left:.7rem;line-height:1}.header--english .header__brand-main{font-family:var(--font-family-display);font-size:1.08rem;font-weight:700;letter-spacing:.16em}.header--english .header__brand-sub{margin-top:.38rem;font-family:var(--font-family-sans);font-size:.61rem;font-weight:600;letter-spacing:.095em;text-transform:uppercase}:root[lang=zh] .header__brand-main,:root[lang=zh] .header__brand-sub{font-feature-settings:"kern" 1,"liga" 1;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}.header__nav{display:none}@media (min-width:1180px){.header__nav{display:flex;flex:1 1 auto;min-width:0;justify-content:center;margin-inline:clamp(.7rem,1.35vw,1.75rem)}}.header__nav-list{display:flex;align-items:center;gap:clamp(.12rem,.3vw,.42rem);list-style:none;margin:0;padding:0;width:100%;min-width:0;justify-content:stretch}[lang=en] .header__nav-list{gap:clamp(.08rem,.22vw,.32rem)}.header__nav-item{position:relative;flex:1 1 0;min-width:0;display:flex;justify-content:center}.header__dropdown-icon{margin-left:.25rem;font-size:.75rem;width:.75rem;height:.75rem;display:inline-flex;align-items:center;justify-content:center;transition:transform var(--transition-duration-300) var(--transition-timing-ease-in-out)}.header__nav-item:hover .header__dropdown-icon{transform:rotate(180deg)}.header__nav-link{color:var(--current-text-secondary);text-decoration:none;font-size:clamp(.82rem,.78vw,1.06rem);font-weight:var(--font-weight-semibold);transition:var(--transition-colors);position:relative;width:100%;min-height:2.75rem;padding:.55rem .12rem;white-space:nowrap;line-height:1.15;display:flex;align-items:center;justify-content:center;text-align:center}[lang=en] .header__nav-link{font-family:var(--font-family-sans);font-size:clamp(.78rem,.76vw,1.04rem);font-weight:600;padding:.42rem .1rem;white-space:normal;line-height:1.18;letter-spacing:-.006em;text-wrap:balance}[lang=en] .header__nav-link .lang-en{display:block;max-width:100%}.header__nav-link:hover{color:var(--color-primary)}:root[data-theme=light] .header__nav-link:hover{color:var(--color-primary-light)}.header__nav-link.active{color:var(--current-text-primary)}.header__nav-link:after{content:"";position:absolute;bottom:0;left:0;width:0;height:2px;background:var(--gradient-primary);transition:width var(--transition-duration-300)}:root[data-theme=light] .header__nav-link:after{background:var(--gradient-light)}.header__nav-link.active:after,.header__nav-link:hover:after{width:100%}.header__dropdown{position:absolute;top:100%;left:50%;transform:translateX(-50%);background:var(--current-card);border:1px solid var(--current-border);border-radius:var(--border-radius-lg);box-shadow:var(--shadow-xl);padding:var(--spacing-2) 0;min-width:200px;opacity:0;visibility:hidden;transform:translateX(-50%) translateY(-10px);transition:all var(--transition-duration-300) var(--transition-timing-ease-in-out);z-index:1000}.header__dropdown.active{opacity:1;visibility:visible;transform:translateX(-50%) translateY(0)}.header__dropdown-list{list-style:none;margin:0;padding:0}.header__dropdown-item{margin:0}.header__dropdown-link{display:block;padding:var(--spacing-3) var(--spacing-4);color:var(--current-text-secondary);text-decoration:none;font-size:var(--font-size-sm);font-weight:var(--font-weight-medium);transition:all var(--transition-duration-300) var(--transition-timing-ease-in-out);position:relative}.header__dropdown-link:hover{color:var(--color-primary);background:var(--current-surface)}:root[data-theme=light] .header__dropdown-link:hover{color:var(--color-primary-light)}.header__actions{display:flex;align-items:center;gap:var(--spacing-3);flex:0 0 auto;margin-left:auto}[lang=en] .header__actions{gap:var(--spacing-2)}.header__action-btn{width:2.5rem;height:2.5rem;border-radius:50%;border:none;background:transparent;color:var(--current-text-secondary);display:flex;align-items:center;justify-content:center;cursor:pointer;transition:var(--transition-all);position:relative}.header__action-btn svg{width:1.25rem!important;height:1.25rem!important;font-size:1.25rem!important;display:block!important}.header__action-btn:hover{background-color:var(--current-surface);color:var(--color-primary);transform:scale(1.1)}:root[data-theme=light] .header__action-btn:hover{color:var(--color-primary-light)}.header__action-btn:active{transform:scale(.95)}[lang=en] .header__dropdown-link{font-size:.8rem;padding:var(--spacing-2) var(--spacing-3)}[lang=en] .header__dropdown{min-width:180px}.header__mobile-toggle{display:flex;width:2.5rem;height:2.5rem;border:none;background:transparent;color:var(--current-text-secondary);align-items:center;justify-content:center;cursor:pointer;transition:var(--transition-all)}@media (min-width:1180px){.header__mobile-toggle{display:none}}.header__mobile-toggle:hover{color:var(--color-primary);background-color:var(--current-surface)}:root[data-theme=light] .header__mobile-toggle:hover{color:var(--color-primary-light)}.header__mobile-menu{display:none;position:fixed;top:var(--header-height);left:0;right:0;bottom:auto;max-height:calc(100dvh - var(--header-height));background:linear-gradient(180deg,color-mix(in srgb,var(--current-card) 98%,var(--color-primary) 2%),var(--current-card));border-top:1px solid var(--current-border);border-bottom:1px solid color-mix(in srgb,var(--current-border) 78%,var(--color-primary) 22%);box-shadow:0 18px 42px rgba(15,23,42,.14);backdrop-filter:var(--backdrop-blur-xl);-webkit-backdrop-filter:var(--backdrop-blur-xl);opacity:0;transform:translateY(-.75rem);transform-origin:top center;transition:opacity var(--transition-duration-300) var(--transition-timing-out),transform var(--transition-duration-300) var(--transition-timing-out);z-index:calc(var(--z-index-modal) + 1);overflow:hidden}.header__mobile-menu.active{display:block;opacity:1;transform:translateY(0)}@media (min-width:1180px){.header__mobile-menu{display:none!important}}.header__mobile-menu-content{padding:.5rem clamp(1rem,5vw,1.5rem) .85rem;max-height:inherit;overflow-y:auto;-webkit-overflow-scrolling:touch}.header__mobile-nav-list{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:.125rem}.header__mobile-nav-link{color:var(--current-text-primary);text-decoration:none;font-weight:var(--font-weight-semibold);padding:.9rem .85rem;min-height:3.25rem;border-radius:var(--border-radius-md);border:1px solid 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10%,transparent)}.header__mobile-backdrop{position:fixed;top:var(--header-height);left:0;right:0;bottom:0;background-color:rgba(2,6,23,.18);backdrop-filter:blur(2px);-webkit-backdrop-filter:blur(2px);z-index:calc(var(--z-index-modal) - 1);opacity:0;animation:fadeIn var(--transition-duration-300) forwards}@keyframes fadeIn{to{opacity:1}}@media (max-width:767px){.header__container{padding:0 .875rem}.header__logo{width:2.5rem;height:2.5rem}.header__brand-text{margin-left:var(--spacing-2)}.header__brand-main{font-size:var(--font-size-lg);letter-spacing:.2em}.header__brand-sub{font-size:.6rem}.header--english .header__brand-text{min-width:0;margin-left:.55rem}.header--english .header__brand-main{font-size:.9rem;letter-spacing:.12em}.header--english .header__brand-sub{display:none}.header__actions{gap:.375rem}.header__action-btn,.header__mobile-toggle{width:2.25rem;height:2.25rem}.header__action-btn svg,.header__mobile-toggle-icon{width:1.05rem!important;height:1.05rem!important;font-size:1.05rem!important}.header__mobile-toggle.active{color:var(--color-primary);background:color-mix(in srgb,var(--color-primary) 12%,var(--current-surface));border-radius:var(--border-radius-lg)}.header__mobile-menu{top:var(--header-height);left:0;right:0;max-height:calc(100dvh - var(--header-height))}.header__mobile-menu-content{padding:.45rem 1rem .75rem}.header__mobile-nav-list{gap:.125rem}.header__mobile-nav-link{min-height:3.1rem;padding:.8rem .75rem;font-size:1rem}}@media (max-width:360px){.header__brand-text{display:none}}[lang=en] .header__mobile-nav-link{min-height:3rem;font-size:.92rem}@media (min-width:640px){.header__container{padding:0 var(--spacing-6)}}@media (min-width:1024px){.header__container{padding:0 var(--spacing-8)}}@media (min-width:1180px) and (max-width:1499px){.header__container{padding-left:1.25rem;padding-right:1.25rem}.header__logo{width:2.65rem;height:2.65rem}.header__nav-list,[lang=en] .header__nav-list{gap:clamp(.06rem,.18vw,.18rem)}.header__nav-link{font-size:clamp(.78rem,.92vw,.86rem)}[lang=en] .header__nav-link{font-size:clamp(.75rem,.86vw,.82rem);letter-spacing:-.012em}.header--english .header__brand-text{min-width:7.6rem;margin-left:.55rem}.header--english .header__brand-main{font-size:.92rem;letter-spacing:.12em}.header--english .header__brand-sub{margin-top:.3rem;font-size:.52rem;letter-spacing:.065em}.header__actions,[lang=en] .header__actions{gap:.2rem}.header__action-btn{width:2.2rem;height:2.2rem}}@media (min-width:1500px) and (max-width:1640px){.header__nav-link{font-size:clamp(.9rem,.96vw,.98rem)}[lang=en] .header__nav-link{font-size:clamp(.86rem,.9vw,.94rem)}.header--english .header__brand-text{min-width:8.4rem}}@media (min-width:1641px) and (max-width:1799px){.header__nav-link{font-size:clamp(.98rem,.96vw,1.04rem)}[lang=en] .header__nav-link{font-size:clamp(.92rem,.9vw,.98rem)}}@media (min-width:1800px){.header__nav-link{font-size:clamp(1rem,.88vw,1.12rem)}[lang=en] .header__nav-link{font-size:clamp(.96rem,.84vw,1.08rem)}}:root[data-theme=light] .header__mobile-backdrop{background-color:rgba(226,232,240,.36)}@media (prefers-reduced-motion:reduce){.header,.header__action-btn,.header__brand-link,.header__mobile-menu,.header__mobile-toggle,.header__nav-link{transition:none}}@media print{.header{position:static;box-shadow:none}.header__actions,.header__mobile-toggle{display:none}}