/* =========================================
           1. Design Tokens (Rectangular & Professional)
           ========================================= */
        @import url("https://fonts.googleapis.com/css2?family=Noto+Sans+SC:wght@100..900&display=swap");
           
        :root {
            /* Colors */
            --color-bg: #ffffff;
            --color-bg-dim: #f0f2f5;      /* 专注模式背景 */
            --color-paper: #ffffff;       /* 问卷纸张背景 */
            --color-text: #1a1a1a;        /* 更深的黑色，提升锐度 */
            --color-text-secondary: #666666;
            --color-primary: #0056b3;     /* 更稳重的深蓝 */
            --color-primary-hover: #004494;
            --color-border: #dcdcdc;      /* 稍微加深的边框 */
            --color-input-bg: #ffffff;
            --color-danger: #d32f2f;
            --color-success: #2e7d32;
            
            /* Dimensions (Rectangular Design) */
            --radius-md: 2px;             /* 极小的圆角，保持矩形感但防割手 */
            --radius-sm: 2px;
            --spacing-container: 1.5rem;
            --spacing-section: 4rem;
            
            /* Typography */
            --font-base: "Noto Sans SC", sans-serif;
            --font-sans: "Noto Sans SC", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", sans-serif;
            
            /* Theme Transition */
            transition: background-color 0.4s ease, color 0.4s ease, border-color 0.4s ease, box-shadow 0.4s ease;
        }

        [data-theme="dark"] {
            --color-bg: #121212;
            --color-bg-dim: #000000;
            --color-paper: #1e1e1e;
            --color-text: #e0e0e0;
            --color-text-secondary: #a0a0a0;
            --color-primary: #64b5f6;
            --color-primary-hover: #42a5f5;
            --color-border: #444;
            --color-input-bg: #2b2b2b;
        }

        /* =========================================
           2. Reset & Typography
           ========================================= */
        *, *::before, *::after { box-sizing: border-box; }
        html { scroll-behavior: smooth; }
        
        body {
            margin: 0;
            font-family: var(--font-sans); /* 默认无衬线，清晰易读 */
            background-color: var(--color-bg);
            color: var(--color-text);
            line-height: 1.6;
            transition: background-color 0.3s ease, color 0.3s ease;
        }
        
        html {
            transition: background-color 0.4s ease, color 0.4s ease, border-color 0.4s ease, box-shadow 0.4s ease;
        }

        h1, h2, h3, h4, h5 { 
            font-weight: 700; 
            margin-top: 0; 
            margin-bottom: 1rem; 
            letter-spacing: -0.02em; 
        }
        p { margin-bottom: 1.5rem; color: var(--color-text-secondary); }
        a { color: var(--color-primary); text-decoration: none; }
        
        /* Utils */
        .container { max-width: 1140px; margin: 0 auto; padding: 0 var(--spacing-container); }
        .d-none { display: none !important; }
        .d-block { display: block !important; }
        .text-muted { color: var(--color-text-secondary) !important; }
        
        /* =========================================
           3. Layout Components (Rectangular)
           ========================================= */
        /* Buttons: Sharp & Solid */
        .btn {
            display: inline-block;
            padding: 0.75rem 2rem;
            font-size: 1rem;
            font-weight: 600;
            text-align: center;
            border-radius: 0; /* 完全矩形 */
            cursor: pointer;
            border: 1px solid transparent;
            transition: all 0.2s;
            text-transform: uppercase;
            letter-spacing: 0.5px;
        }
        .btn-primary { background-color: var(--color-primary); color: #fff; }
        .btn-primary:hover { background-color: var(--color-primary-hover); }
        .btn-outline { background: transparent; border-color: var(--color-text); color: var(--color-text); }
        .btn-outline:hover { background: var(--color-text); color: var(--color-bg); }
        .btn:disabled { opacity: 0.5; cursor: not-allowed; }

        /* Forms: Traditional Look */
        .form-control, .form-select {
            display: block;
            width: 100%;
            padding: 0.75rem 1rem;
            font-size: 1rem;
            font-weight: 400;
            line-height: 1.5;
            color: var(--color-text);
            background-color: var(--color-input-bg);
            border: 1px solid var(--color-border);
            border-radius: 0;
            transition: border-color 0.2s;
        }
        .form-control:focus, .form-select:focus {
            outline: 0;
            border-color: var(--color-primary);
        }
        .form-control:hover, .form-select:hover {
            border-color: #999;
        }
        .form-label { font-weight: 600; margin-bottom: 0.5rem; display: block; color: var(--color-text); }
        .form-label small { font-weight: 400; color: var(--color-text-secondary); font-size: 0.85em; }
        
        /* Radio custom styling */
        .radio-custom { display: flex; align-items: center; cursor: pointer; padding: 8px 0; }
        .radio-custom input[type="radio"] { 
            width: 18px; height: 18px; margin: 0 8px 0 0; 
            cursor: pointer; accent-color: var(--color-primary);
        }

        /* Cards & Sections */
        .hero-section { 
            text-align: center; 
            padding: 5rem 0 3rem; 
            background: linear-gradient(180deg, var(--color-bg-dim) 0%, var(--color-bg) 100%);
        }
        .hero-section h1 { 
            font-size: 2.5rem; 
            margin-bottom: 1.5rem; 
            letter-spacing: -0.02em;
        }
        .hero-section .lead {
            font-size: 1.25rem;
            color: var(--color-text-secondary);
            max-width: 800px;
            margin: 0 auto;
            line-height: 1.8;
        }
        
        /* Section Separator */
        .section-separator {
            padding: 5rem 0;
            border-bottom: 1px solid var(--color-border);
        }
        .section-separator:last-child {
            border-bottom: none;
        }
        
        /* Section Header */
        .section-header {
            text-align: center;
            margin-bottom: 4rem;
        }
        .section-header h2 {
            font-size: 2rem;
            margin-bottom: 1rem;
            position: relative;
            display: inline-block;
        }
        .section-header h2::after {
            content: '';
            position: absolute;
            bottom: -10px;
            left: 50%;
            transform: translateX(-50%);
            width: 60px;
            height: 3px;
            background: var(--color-primary);
        }
        .section-header .lead {
            color: var(--color-text-secondary);
            font-size: 1.1rem;
            margin-top: 1.5rem;
        }
        
        /* Feature Split */
        .feature-split {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 4rem;
            align-items: center;
        }
        .feature-split__text {
            padding: 1rem;
        }
        .feature-split__text h3 {
            font-size: 1.5rem;
            margin-bottom: 1rem;
            color: var(--color-text);
        }
        .feature-split__text p {
            line-height: 1.8;
            margin-bottom: 1.5rem;
        }
        .feature-split__media {
            display: flex;
            justify-content: center;
            align-items: center;
            padding: 2rem;
        }
        .feature-split--reverse {
            direction: rtl;
        }
        .feature-split--reverse .feature-split__text {
            direction: ltr;
        }
        .fa-icon-fix {
            font-size: 5rem;
            color: var(--color-primary);
            opacity: 0.9;
        }
        
        /* Feature Card */
        .feature-card {
            padding: 2.5rem 2rem;
            border: 1px solid var(--color-border);
            background: var(--color-bg);
            text-align: center;
            height: 100%;
            transition: all 0.3s ease;
            position: relative;
            overflow: hidden;
        }
        .feature-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 3px;
            background: var(--color-primary);
            transform: scaleX(0);
            transition: transform 0.3s ease;
        }
        .feature-card:hover {
            border-color: var(--color-primary);
            transform: translateY(-4px);
        }
        .feature-card:hover::before {
            transform: scaleX(1);
        }
        .feature-card__icon {
            font-size: 2.5rem;
            color: var(--color-primary);
            margin-bottom: 1.5rem;
            display: inline-block;
        }
        .feature-card h3 {
            font-size: 1.25rem;
            margin-bottom: 1rem;
            color: var(--color-text);
        }
        .feature-card p {
            line-height: 1.7;
            margin-bottom: 0;
        }
        
        /* Cards Grid */
        .cards-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 2rem;
        }
        
        /* Final CTA */
        .final-cta {
            padding: 5rem 0;
            text-align: center;
            border-top: 1px solid var(--color-border);
        }
        .final-cta h2 {
            font-size: 2rem;
            margin-bottom: 1rem;
        }
        .final-cta .lead {
            font-size: 1.1rem;
            color: var(--color-text-secondary);
            margin-bottom: 2rem;
            line-height: 1.8;
        }
        
        /* Hero Buttons */
        .hero-buttons {
            display: flex;
            gap: 1rem;
            justify-content: center;
            margin-top: 2rem;
            flex-wrap: wrap;
        }
        
        /* =========================================
           4. Navigation
           ========================================= */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background-color: var(--color-bg);
            border-bottom: 1px solid var(--color-border);
            transition: transform 0.5s cubic-bezier(0.19, 1, 0.22, 1);
        }
        .navbar { display: flex; justify-content: space-between; align-items: center; height: 4.5rem; }
        .nav-brand { font-size: 1.4rem; font-weight: 700; color: var(--color-text); text-transform: uppercase; }
        .nav-menu { display: flex; list-style: none; padding: 0; margin: 0; gap: 2rem; }
        .nav-menu a { font-size: 0.9rem; font-weight: 500; color: var(--color-text-secondary); }
        .nav-menu a.active, .nav-menu a:hover { color: var(--color-primary); border-bottom: 2px solid var(--color-primary); padding-bottom: 2px; }
        
        @media (max-width: 991px) {
            .nav-menu { display: none; } /* Mobile Hidden */
        }

        /* =========================================
           5. Focus Mode (Professional Upgrade)
           ========================================= */
        
        /* 1. Base State Override */
        body.focus-mode {
            background-color: var(--color-bg-dim); /* 变暗的背景，聚焦中间 */
            overflow-y: scroll; /* 保持滚动条防止抖动 */
        }

        /* 2. Hide Distractions */
        body.focus-mode .site-header { transform: translateY(-100%); }
        body.focus-mode .hero-section { display: none; }

        /* 3. The "Paper" Container */
        .survey-paper {
            background: var(--color-paper);
            max-width: 800px;
            margin: 0 auto;
            padding: 3rem 4rem;
            min-height: 80vh;
            border: 1px solid var(--color-border);
            box-shadow: none;
            transition: all 0.5s ease;
        }

        /* Focus Mode active styling for paper */
        body.focus-mode .survey-paper {
            margin-top: 4rem;
            margin-bottom: 4rem;
            border: none;
            padding-left: 2rem;
            padding-right: 2rem;
        }

        /* 4. Toggle Button */
        #focus-toggle-btn {
            position: fixed;
            top: 20px;
            right: 20px;
            z-index: 2000;
            background: var(--color-paper);
            border: 1px solid var(--color-border);
            padding: 8px 16px;
            font-size: 0.85rem;
            font-weight: 500;
            cursor: pointer;
            display: none; /* Initially hidden */
            align-items: center;
            gap: 8px;
            opacity: 0;
            transform: translateY(-10px);
            transition: all 0.3s ease;
        }
        #focus-toggle-btn.visible { display: flex; opacity: 1; transform: translateY(0); }
        #focus-toggle-btn:hover { background: var(--color-bg-dim); }

        @media (max-width: 768px) {
            .survey-paper { padding: 2rem 1.5rem; border: none; border-top: 1px solid var(--color-border); }
            body.focus-mode .survey-paper { margin-top: 0; margin-bottom: 0; width: 100%; box-shadow: none; padding-left: 1.5rem; padding-right: 1.5rem; }
        }

        /* =========================================
           6. Utility Classes (Bootstrap-like)
           ========================================= */
        /* Display */
        .d-none { display: none !important; }
        .d-block { display: block !important; }
        .d-flex { display: flex !important; }
        .d-inline-block { display: inline-block !important; }
        
        /* Flexbox */
        .flex-column { flex-direction: column !important; }
        .flex-wrap { flex-wrap: wrap !important; }
        .flex-nowrap { flex-wrap: nowrap !important; }
        .justify-content-center { justify-content: center !important; }
        .justify-content-between { justify-content: space-between !important; }
        .align-items-center { align-items: center !important; }
        
        /* Spacing */
        .mb-2 { margin-bottom: 0.5rem !important; }
        .mb-3 { margin-bottom: 1rem !important; }
        .mb-4 { margin-bottom: 1.5rem !important; }
        .mb-5 { margin-bottom: 3rem !important; }
        .mb-4 { margin-bottom: 1.5rem !important; }
        .mt-3 { margin-top: 1rem !important; }
        .mt-5 { margin-top: 3rem !important; }
        .my-4 { margin-top: 1.5rem !important; margin-bottom: 1.5rem !important; }
        .pb-3 { padding-bottom: 1rem !important; }
        .py-3 { padding-top: 1rem !important; padding-bottom: 1rem !important; }
        .py-5 { padding-top: 3rem !important; padding-bottom: 3rem !important; }
        .p-2 { padding: 0.5rem !important; }
        .ms-2 { margin-left: 0.5rem !important; }
        .me-2 { margin-right: 0.5rem !important; }
        
        /* Text */
        .text-muted { color: var(--color-text-secondary) !important; }
        .text-primary { color: var(--color-primary) !important; }
        .text-center { text-align: center !important; }
        .text-end { text-align: right !important; }
        .text-nowrap { white-space: nowrap !important; }
        .text-uppercase { text-transform: uppercase !important; }
        .fw-bold { font-weight: 700 !important; }
        
        /* Borders */
        .border { border: 1px solid var(--color-border) !important; }
        .border-bottom { border-bottom: 1px solid var(--color-border) !important; }
        .border-top { border-top: 1px solid var(--color-border) !important; }
        .rounded { border-radius: var(--radius-md) !important; }
        .rounded-circle { border-radius: 50% !important; }
        
        /* Background */
        .bg-white { background-color: #ffffff !important; }
        [data-theme="dark"] .bg-white { background-color: #2b2b2b !important; }
        
        /* Width */
        .w-100 { width: 100% !important; }
        
        /* Grid System */
        .row { display: flex; flex-wrap: wrap; margin: 0 -1rem; }
        .col { flex: 1 0 0%; padding: 0 1rem; }
        .col-12 { flex: 0 0 100%; max-width: 100%; padding: 0 1rem; }
        .col-md-5 { flex: 0 0 41.666667%; max-width: 41.666667%; padding: 0 1rem; }
        .col-md-7 { flex: 0 0 58.333333%; max-width: 58.333333%; padding: 0 1rem; }
        
        /* Gap */
        .gap-2 { gap: 0.5rem !important; }
        .gap-4 { gap: 1.5rem !important; }
        
        /* Lead text */
        .lead { font-size: 1.25rem; font-weight: 300; }
        
        /* =========================================
           7. Cookie Consent Banner
           ========================================= */
        .cookie-consent {
            display: none;
            position: fixed;
            bottom: 0;
            left: 0;
            right: 0;
            background: var(--color-paper);
            border-top: 1px solid var(--color-border);
            padding: 1.5rem 2rem;
            z-index: 9999;
            box-shadow: 0 -2px 10px rgba(0,0,0,0.1);
        }
        .cookie-consent.show {
            display: block;
        }
        .cookie-consent__content {
            max-width: 1200px;
            margin: 0 auto;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 2rem;
        }
        .cookie-consent__content p {
            margin: 0;
            flex: 1;
            font-size: 0.9rem;
            color: var(--color-text);
        }
        .cookie-consent__content a {
            color: var(--color-primary);
            text-decoration: underline;
        }
        .cookie-consent__content .btn {
            padding: 0.5rem 1.5rem;
            font-size: 0.9rem;
            white-space: nowrap;
        }
        
        @media (max-width: 768px) {
            .cookie-consent__content {
                flex-direction: column;
                align-items: flex-start;
                gap: 1rem;
            }
            .cookie-consent__content .btn {
                width: 100%;
            }
        }
        
        /* =========================================
           8. Mobile Menu
           ========================================= */
        .nav-actions {
            display: flex;
            align-items: center;
            gap: 0.75rem;
        }
        .mobile-menu-btn { 
            display: none; 
            background: none; 
            border: none; 
            font-size: 1.25rem; 
            color: var(--color-text); 
            cursor: pointer; 
            padding: 0.5rem;
            transition: color 0.2s;
        }
        .mobile-menu-btn:hover {
            color: var(--color-primary);
        }
        
        #fullscreen-menu {
            position: fixed; top: 0; left: 0; width: 100%; height: 100%;
            background: var(--color-bg); z-index: 2000;
            display: flex; flex-direction: column; justify-content: center; align-items: center;
            opacity: 0; pointer-events: none; transition: opacity 0.3s ease;
        }
        #fullscreen-menu.is-open { opacity: 1; pointer-events: auto; }
        #fullscreen-menu a {
            font-size: 1.5rem; color: var(--color-text); padding: 1rem 2rem;
            text-decoration: none; transition: color 0.2s;
        }
        #fullscreen-menu a:hover { color: var(--color-primary); }
        #fullscreen-menu-close {
            position: absolute; top: 2rem; right: 2rem;
            background: none; border: none; font-size: 2rem;
            color: var(--color-text); cursor: pointer;
            padding: 0.5rem;
            transition: color 0.2s;
            z-index: 2001;
        }
        #fullscreen-menu-close:hover {
            color: var(--color-primary);
        }
        
        @media (max-width: 991px) {
            .nav-menu { display: none; }
            .mobile-menu-btn { display: block; }
            .feature-split { grid-template-columns: 1fr; gap: 2rem; }
            .feature-split--reverse { direction: ltr; }
            .hero-section h1 { font-size: 2rem; }
            .hero-section .lead { font-size: 1.1rem; }
            .section-header h2 { font-size: 1.75rem; }
            .feature-card { padding: 2rem 1.5rem; }
            .final-cta { padding: 3rem 0; }
            .final-cta h2 { font-size: 1.75rem; }
        }
        
        @media (max-width: 768px) {
            .hero-section { padding: 3rem 0 2rem; }
            .hero-section h1 { font-size: 1.75rem; }
            .hero-section .lead { font-size: 1rem; }
            .section-separator { padding: 3rem 0; }
            .section-header { margin-bottom: 2.5rem; }
            .section-header h2 { font-size: 1.5rem; }
            .cards-grid { grid-template-columns: 1fr; gap: 1.5rem; }
            .feature-card { padding: 1.75rem 1.25rem; }
            .feature-card__icon { font-size: 2rem; }
            .feature-card h3 { font-size: 1.1rem; }
            .feature-card p { font-size: 0.95rem; }
            .final-cta { padding: 2.5rem 0; }
            .final-cta h2 { font-size: 1.5rem; }
            .final-cta .lead { font-size: 1rem; }
            .hero-buttons { flex-direction: column; }
            .hero-buttons .btn { width: 100%; }
        }
        
        @media (max-width: 480px) {
            .hero-section h1 { font-size: 1.5rem; }
            .section-header h2 { font-size: 1.25rem; }
            .feature-card { padding: 1.5rem 1rem; }
            .fa-icon-fix { font-size: 3.5rem; }
        }
        
        /* =========================================
           8. Misc (Helpers)
           ========================================= */
        
        /* Theme Switcher */
        .theme-switcher { width: 36px; height: 36px; border-radius: 50%; border: 1px solid var(--color-border); background: transparent; color: var(--color-text-secondary); display: flex; align-items: center; justify-content: center; cursor: pointer; }
        .theme-icon { width: 20px; height: 20px; }
        #icon-sun { display: none; }
        #icon-moon { display: block; }
        [data-theme="dark"] #icon-sun { display: block; }
        [data-theme="dark"] #icon-moon { display: none; }

        /* Geetest Banner */
        .passport-notice { padding: 12px; margin-bottom: 20px; border-radius: var(--radius-sm); font-size: 0.95rem; text-align: center; animation: fadeIn 0.3s ease; }
        .passport-notice.error { background-color: color-mix(in srgb, var(--color-danger) 10%, transparent); color: var(--color-danger); border: 1px solid color-mix(in srgb, var(--color-danger) 20%, transparent); }
        .passport-notice.success { background-color: color-mix(in srgb, var(--color-success) 10%, transparent); color: var(--color-success); border: 1px solid color-mix(in srgb, var(--color-success) 20%, transparent); }
        @keyframes fadeIn { from { opacity: 0; transform: translateY(-5px); } to { opacity: 1; transform: translateY(0); } }

        /* Footer */
        .site-footer { background-color: var(--color-bg-dim); padding: 3rem 0; margin-top: auto; text-align: center; border-top: 1px solid var(--color-border); color: var(--color-text-secondary); font-size: 0.9rem; transition: transform var(--transition-focus), opacity var(--transition-focus); }
        .site-footer .container {
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 1rem;
        }
        .footer-links {
            display: flex;
            justify-content: center;
            gap: 1rem;
            flex-wrap: wrap;
        }
        .footer-links a {
            color: var(--color-text-secondary);
            white-space: nowrap;
            position: relative;
        }
        .footer-links a:not(:last-child)::after {
            content: '';
            position: absolute;
            right: -0.5rem;
            top: 50%;
            transform: translateY(-50%);
            width: 1px;
            height: 1em;
            background-color: var(--color-border);
        }
        .footer-links a:hover { color: var(--color-primary); }
        .footer-brand-link { color: var(--color-text-secondary); text-decoration: none; transition: color 0.2s; }
        .footer-brand-link:hover { color: var(--color-primary); text-decoration: none; }
        
        @media (max-width: 768px) {
            .site-footer {
                text-align: left;
                padding: 2rem 0;
            }
            .site-footer .container {
                align-items: flex-start;
            }
            .footer-links {
                justify-content: flex-start;
                flex-direction: column;
                gap: 0.5rem;
            }
            .footer-links > * {
                white-space: nowrap;
            }
            .footer-links a:not(:last-child)::after {
                display: none;
            }
        }

        /* =========================================
           9. Global Notice Dialog
           ========================================= */
        .notice-overlay {
            position: fixed;
            inset: 0;
            z-index: 4000;
            display: none;
            align-items: center;
            justify-content: center;
            padding: 1.5rem;
        }
        .notice-overlay.is-open { display: flex; }
        .notice-overlay__backdrop {
            position: absolute;
            inset: 0;
            background: rgba(0, 0, 0, 0.55);
            backdrop-filter: blur(4px);
            animation: noticeFadeIn 0.2s ease;
        }
        .notice-dialog {
            position: relative;
            background: var(--color-bg);
            border: 1px solid var(--color-border);
            max-width: 440px;
            width: 100%;
            max-height: calc(100vh - 3rem);
            overflow-y: auto;
            padding: 2.5rem 2rem 2rem;
            text-align: center;
            animation: noticeSlideIn 0.3s cubic-bezier(0.19, 1, 0.22, 1);
            box-shadow: 0 20px 60px rgba(0, 0, 0, 0.25);
        }
        .notice-dialog__close {
            position: absolute;
            top: 0.5rem;
            right: 0.5rem;
            background: none;
            border: none;
            font-size: 1.1rem;
            color: var(--color-text-secondary);
            cursor: pointer;
            width: 32px;
            height: 32px;
            display: flex;
            align-items: center;
            justify-content: center;
            transition: color 0.2s;
        }
        .notice-dialog__close:hover { color: var(--color-text); }
        .notice-dialog__icon {
            margin: 0 auto 1.25rem;
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .notice-dialog__icon i { font-size: 2.75rem; }
        .notice-dialog--success .notice-dialog__icon { color: var(--color-success); }
        .notice-dialog--error .notice-dialog__icon { color: var(--color-danger); }
        .notice-dialog--warning .notice-dialog__icon { color: #ed6c02; }
        .notice-dialog--info .notice-dialog__icon { color: var(--color-primary); }

        .notice-dialog__title {
            font-size: 1.35rem;
            font-weight: 700;
            margin: 0 0 0.75rem;
            color: var(--color-text);
        }
        .notice-dialog__message {
            font-size: 0.95rem;
            line-height: 1.7;
            color: var(--color-text-secondary);
            margin: 0 0 1.75rem;
            word-break: break-word;
            white-space: pre-wrap;
        }
        .notice-dialog__actions {
            display: flex;
            justify-content: center;
            gap: 0.75rem;
            flex-wrap: wrap;
        }
        .notice-dialog__actions .btn {
            min-width: 120px;
            text-transform: none;
        }

        @keyframes noticeFadeIn {
            from { opacity: 0; }
            to { opacity: 1; }
        }
        @keyframes noticeSlideIn {
            from { opacity: 0; transform: translateY(-16px) scale(0.96); }
            to { opacity: 1; transform: translateY(0) scale(1); }
        }

        @media (max-width: 480px) {
            .notice-dialog { padding: 2rem 1.25rem 1.5rem; }
            .notice-dialog__actions .btn { width: 100%; }
        }