:root {
            --ink: #163044;
            --muted: #64748b;
            --line: #dbe7ee;
            --paper: #ffffff;
            --page: #f4f8fb;
            --brand: #bd2d42;
            --accent: #087d86;
            --gold: #c58b2c;
            --focus: rgba(8, 125, 134, .18);
        }

        * {
            box-sizing: border-box;
        }

        html,
        body {
            margin: 0;
            min-height: 100%;
            background: var(--page);
            color: var(--ink);
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
            letter-spacing: 0;
        }

        body {
            padding-bottom: env(safe-area-inset-bottom);
        }

        button,
        input,
        select {
            font: inherit;
        }

        .usvisa-page {
            min-height: 100vh;
            background:
                linear-gradient(180deg, rgba(255, 255, 255, 0) 0, #f4f8fb 330px),
                linear-gradient(180deg, #f4f8fb 0, #ffffff 52%, #eef7f8 100%);
        }

        .hero {
            position: relative;
            min-height: 264px;
            padding: 24px 20px 44px;
            overflow: hidden;
            color: var(--ink);
            background: #d9eef8;
        }

        .hero::before {
            position: absolute;
            inset: 0;
            content: "";
            background:
                linear-gradient(180deg, rgba(255, 255, 255, .48), rgba(255, 255, 255, .78)),
                linear-gradient(90deg, rgba(244, 250, 253, .96) 0%, rgba(244, 250, 253, .72) 45%, rgba(244, 250, 253, .46) 100%),
                url("../images/index_bj_1.jpg") 31% center/cover no-repeat;
        }

        .hero::after {
            position: absolute;
            left: 0;
            right: 0;
            bottom: 0;
            height: 5px;
            content: "";
            background: linear-gradient(90deg, var(--brand), var(--gold), var(--accent));
        }

        .hero-inner {
            position: relative;
            z-index: 1;
            max-width: 560px;
            margin: 0 auto;
        }

        .hero-title {
            margin: 18px 0 12px;
            font-size: 34px;
            line-height: 1.08;
            font-weight: 850;
            color: #163044;
            text-shadow: 0 2px 0 rgba(255, 255, 255, .58);
        }

        .hero-subtitle {
            margin: 0;
            max-width: 20em;
            color: #4e667a;
            font-size: 15px;
            line-height: 1.72;
        }

        .branch-strip {
            position: relative;
            z-index: 2;
            max-width: 560px;
            margin: -30px auto 0;
            padding: 0 16px;
        }

        .branch-panel {
            position: relative;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            min-height: 78px;
            padding: 16px;
            border: 1px solid rgba(255, 255, 255, .86);
            border-radius: 8px;
            background: rgba(255, 255, 255, .97);
            box-shadow: 0 18px 38px rgba(70, 102, 126, .14);
            overflow: hidden;
        }

        .branch-panel::before {
            position: absolute;
            left: 0;
            top: 14px;
            bottom: 14px;
            width: 4px;
            content: "";
            border-radius: 999px;
            background: linear-gradient(180deg, var(--brand), var(--gold), var(--accent));
        }

        .branch-kicker {
            margin: 0 0 5px;
            color: var(--muted);
            font-size: 12px;
            line-height: 1.2;
        }

        .branch-name {
            margin: 0;
            color: var(--ink);
            font-size: 18px;
            line-height: 1.3;
            font-weight: 750;
        }

        .branch-code {
            flex: 0 0 auto;
            padding: 7px 11px;
            border-radius: 6px;
            background: #e8f6f2;
            color: #0b756d;
            font-size: 12px;
            line-height: 16px;
            font-weight: 700;
        }

        .materials-section {
            max-width: 560px;
            margin: 16px auto 0;
            padding: 0 16px;
        }

        .materials-panel {
            border: 1px solid var(--line);
            border-radius: 8px;
            background: #ffffff;
            box-shadow: 0 18px 42px rgba(70, 102, 126, .08);
            overflow: hidden;
        }

        .materials-heading {
            padding: 20px 18px 15px;
            background:
                linear-gradient(135deg, rgba(8, 125, 134, .1), rgba(197, 139, 44, .1)),
                #ffffff;
        }

        .materials-kicker {
            margin: 0 0 6px;
            color: #087d86;
            font-size: 12px;
            line-height: 1.2;
            font-weight: 800;
        }

        .materials-heading h2 {
            margin: 0;
            color: var(--ink);
            font-size: 20px;
            line-height: 1.35;
            font-weight: 850;
        }

        .materials-heading p {
            margin: 8px 0 0;
            color: #52687b;
            font-size: 14px;
            line-height: 1.6;
        }

        .materials-essential {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 9px;
            padding: 16px 18px 14px;
        }

        .material-item {
            min-height: 68px;
            padding: 11px 10px;
            border: 1px solid #dbe7ee;
            border-radius: 8px;
            background: #fbfcfe;
        }

        .material-item:last-child:nth-child(odd) {
            grid-column: 1 / -1;
            min-height: 56px;
        }

        .material-item span {
            display: block;
            margin-bottom: 6px;
            color: #bd2d42;
            font-size: 12px;
            line-height: 1;
            font-weight: 850;
        }

        .material-item strong {
            display: block;
            color: #23384a;
            font-size: 14px;
            line-height: 1.35;
            font-weight: 760;
        }

        .materials-alert {
            margin: 0 18px 16px;
            padding: 12px 12px;
            border-left: 4px solid #c58b2c;
            border-radius: 8px;
            background: #fff8e8;
            color: #6f4a0f;
            font-size: 13px;
            line-height: 1.6;
            font-weight: 650;
        }

        .materials-details {
            border-top: 1px solid var(--line);
        }

        .materials-details details {
            border-bottom: 1px solid var(--line);
            background: #ffffff;
        }

        .materials-details details:last-child {
            border-bottom: 0;
        }

        .materials-details summary {
            position: relative;
            display: block;
            padding: 15px 44px 15px 18px;
            color: var(--ink);
            font-size: 15px;
            line-height: 1.4;
            font-weight: 800;
            cursor: pointer;
            list-style: none;
        }

        .materials-details summary::-webkit-details-marker {
            display: none;
        }

        .materials-details summary::after {
            position: absolute;
            top: 50%;
            right: 20px;
            width: 9px;
            height: 9px;
            content: "";
            border-right: 2px solid #667085;
            border-bottom: 2px solid #667085;
            transform: translateY(-65%) rotate(45deg);
            transition: transform .18s ease;
        }

        .materials-details details[open] summary::after {
            transform: translateY(-35%) rotate(225deg);
        }

        .materials-details ul {
            margin: 0;
            padding: 0 18px 16px 36px;
            color: #536779;
            font-size: 13px;
            line-height: 1.65;
        }

        .materials-details li + li {
            margin-top: 7px;
        }

        .materials-details .photo-requirement-list {
            margin-top: 8px;
            padding: 0 0 0 18px;
        }

        .materials-details .photo-requirement-list li + li {
            margin-top: 5px;
        }

        .materials-link {
            color: #1769e0;
            font-weight: 800;
            text-decoration: underline;
            text-underline-offset: 3px;
        }

        .form-shell {
            max-width: 560px;
            margin: 18px auto 0;
            padding: 0 16px 30px;
        }

        .form-surface {
            border: 1px solid var(--line);
            border-radius: 8px;
            background: var(--paper);
            box-shadow: 0 18px 42px rgba(70, 102, 126, .09);
            overflow: hidden;
        }

        .form-section {
            padding: 22px 18px;
            border-top: 1px solid var(--line);
        }

        .form-section:first-child {
            border-top: 0;
        }

        .section-title {
            margin: 0 0 16px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 10px;
            font-size: 19px;
            line-height: 1.35;
            font-weight: 800;
        }

        .section-mark {
            flex: 0 0 auto;
            height: 5px;
            width: 38px;
            border-radius: 999px;
            background: linear-gradient(90deg, var(--brand), var(--gold), var(--accent));
        }

        .field {
            margin: 0 0 15px;
        }

        .field:last-child {
            margin-bottom: 0;
        }

        .field.is-hidden {
            display: none;
        }

        .field label {
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin: 0 0 8px;
            color: #344054;
            font-size: 14px;
            line-height: 1.35;
            font-weight: 650;
        }

        .required {
            color: var(--brand);
        }

        .control,
        .select-control {
            display: block;
            width: 100%;
            min-height: 50px;
            border: 1px solid #d4dde8;
            border-radius: 8px;
            background: #fbfcfe;
            color: var(--ink);
            padding: 12px 13px;
            font-size: 16px;
            line-height: 22px;
            outline: none;
            transition: border-color .18s ease, box-shadow .18s ease, background .18s ease;
        }

        .select-control {
            appearance: none;
            background-image:
                linear-gradient(45deg, transparent 50%, #667085 50%),
                linear-gradient(135deg, #667085 50%, transparent 50%);
            background-position:
                calc(100% - 18px) 20px,
                calc(100% - 12px) 20px;
            background-size: 6px 6px;
            background-repeat: no-repeat;
            padding-right: 34px;
        }

        .control:focus,
        .select-control:focus {
            border-color: var(--accent);
            box-shadow: 0 0 0 4px var(--focus);
        }

        .control::placeholder {
            color: #98a2b3;
        }

        .scan-control-row {
            display: flex;
            align-items: stretch;
            gap: 8px;
        }

        .scan-control-row .control {
            flex: 1 1 auto;
            min-width: 0;
        }

        .scan-btn {
            flex: 0 0 78px;
            min-height: 50px;
            border: 0;
            border-radius: 8px;
            background: #087d86;
            color: #fff;
            font-size: 15px;
            line-height: 20px;
            font-weight: 720;
            box-shadow: 0 10px 22px rgba(8, 125, 134, .18);
        }

        .scan-btn:active {
            transform: translateY(1px);
        }

        .scan-btn:disabled {
            background: #98a2b3;
            box-shadow: none;
        }

        .readonly-control {
            background: #f2f6f9;
            color: #667085;
        }

        .toggle-row {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 14px;
            min-height: 62px;
            padding: 14px 0 16px;
        }

        .toggle-copy strong {
            display: block;
            margin-bottom: 3px;
            font-size: 16px;
            line-height: 1.3;
        }

        .toggle-copy span {
            display: block;
            color: var(--muted);
            font-size: 13px;
            line-height: 1.45;
        }

        .switch {
            position: relative;
            flex: 0 0 auto;
            width: 56px;
            height: 32px;
        }

        .switch input {
            position: absolute;
            opacity: 0;
        }

        .slider {
            position: absolute;
            inset: 0;
            cursor: pointer;
            border-radius: 999px;
            background: #d0d5dd;
            transition: background .2s ease;
        }

        .slider::before {
            position: absolute;
            content: "";
            width: 26px;
            height: 26px;
            left: 3px;
            top: 3px;
            border-radius: 50%;
            background: #fff;
            box-shadow: 0 3px 8px rgba(16, 24, 40, .24);
            transition: transform .2s ease;
        }

        .switch input:checked + .slider {
            background: var(--accent);
        }

        .switch input:checked + .slider::before {
            transform: translateX(24px);
        }

        .passport-panel {
            display: none;
            padding-top: 10px;
        }

        .passport-panel.is-open {
            display: block;
            margin-bottom: 22px;
        }

        .passport-copy {
            margin-bottom: 12px;
        }

        .upload-zone {
            position: relative;
            display: flex;
            align-items: center;
            gap: 13px;
            min-height: 92px;
            padding: 15px;
            border: 1px dashed #9fc9c2;
            border-radius: 8px;
            background: #f7fbfa;
            overflow: hidden;
        }

        .upload-zone input[type="file"] {
            position: absolute;
            inset: 0;
            opacity: 0;
            cursor: pointer;
        }

        .upload-symbol {
            flex: 0 0 auto;
            width: 52px;
            height: 52px;
            border-radius: 8px;
            border: 1px solid #dce8e7;
            background: #fff;
            display: grid;
            place-items: center;
        }

        .upload-symbol::before {
            content: "";
            width: 25px;
            height: 18px;
            border: 2px solid var(--accent);
            border-radius: 4px;
            background:
                radial-gradient(circle at 50% 50%, var(--accent) 0 3px, transparent 4px);
        }

        .upload-text {
            min-width: 0;
        }

        .upload-text strong {
            display: block;
            font-size: 15px;
            line-height: 1.4;
        }

        .upload-text span {
            display: block;
            margin-top: 3px;
            color: var(--muted);
            font-size: 13px;
            line-height: 1.45;
        }

        .preview {
            display: none;
            margin: 12px 0 3px;
            width: 100%;
            aspect-ratio: 16 / 10;
            border-radius: 8px;
            object-fit: cover;
            border: 1px solid var(--line);
            background: #eef2f6;
        }

        .preview.is-visible {
            display: block;
        }

        .ocr-progress {
            display: none;
            align-items: center;
            gap: 10px;
            margin: 12px 0 0;
            padding: 10px 12px;
            border: 1px solid #cdece8;
            border-radius: 8px;
            background: #effaf8;
            color: #087d86;
            font-size: 13px;
            line-height: 1.45;
            font-weight: 650;
        }

        .ocr-progress.is-visible {
            display: flex;
        }

        .ocr-spinner {
            flex: 0 0 auto;
            width: 18px;
            height: 18px;
            border: 2px solid rgba(8, 125, 134, .18);
            border-top-color: var(--accent);
            border-radius: 50%;
            animation: usvisa-spin .72s linear infinite;
        }

        @keyframes usvisa-spin {
            to {
                transform: rotate(360deg);
            }
        }

        .field-grid {
            display: grid;
            grid-template-columns: 1fr;
            gap: 15px;
            margin-top: 15px;
        }

        .field-wide {
            grid-column: 1 / -1;
        }

        .consulate-options {
            display: grid;
            grid-template-columns: repeat(3, minmax(0, 1fr));
            gap: 8px;
        }

        .field .consulate-option {
            position: relative;
            display: flex;
            align-items: center;
            justify-content: center;
            text-align: center;
            min-height: 42px;
            margin: 0;
            border: 1px solid #d4dde8;
            border-radius: 8px;
            background: #fbfcfe;
            color: #344054;
            font-size: 14px;
            line-height: 18px;
            font-weight: 650;
            transition: border-color .18s ease, background .18s ease, color .18s ease, box-shadow .18s ease;
        }

        .field .consulate-option span {
            width: 100%;
        }

        .consulate-option input {
            position: absolute;
            opacity: 0;
            pointer-events: none;
        }

        .consulate-option:has(input:checked) {
            border-color: var(--accent);
            background: #effaf8;
            color: #087d86;
            box-shadow: 0 0 0 4px var(--focus);
        }

        .status-line {
            min-height: 20px;
            margin: 10px 0 0;
            color: var(--muted);
            font-size: 13px;
            line-height: 1.5;
        }

        .agreement {
            display: flex;
            align-items: flex-start;
            gap: 9px;
            margin-top: 18px;
            color: #475467;
            font-size: 13px;
            line-height: 1.55;
        }

        .agreement input {
            width: 18px;
            height: 18px;
            margin: 1px 0 0;
            accent-color: var(--accent);
        }

        .action-bar {
            position: sticky;
            bottom: 0;
            z-index: 3;
            margin: 18px -16px 0;
            padding: 12px 16px calc(12px + env(safe-area-inset-bottom));
            background: rgba(244, 248, 251, .9);
            backdrop-filter: blur(12px);
        }

        .submit-btn {
            width: 100%;
            min-height: 52px;
            border: 0;
            border-radius: 8px;
            background: linear-gradient(90deg, #bd2d42, #087d86);
            color: #fff;
            font-size: 17px;
            line-height: 22px;
            font-weight: 760;
            box-shadow: 0 16px 30px rgba(8, 125, 134, .2);
        }

        .submit-btn:disabled {
            cursor: not-allowed;
            background: #98a2b3;
            box-shadow: none;
        }

        .barcode-scanner-layer {
            position: fixed;
            inset: 0;
            z-index: 40;
            display: none;
            align-items: center;
            justify-content: center;
            padding: env(safe-area-inset-top) 14px env(safe-area-inset-bottom);
            background: rgba(12, 18, 28, .86);
        }

        .barcode-scanner-layer.is-visible {
            display: flex;
        }

        .barcode-scanner-panel {
            width: 100%;
            max-width: 560px;
            max-height: 96vh;
            overflow: hidden;
            border-radius: 16px;
            background: #111827;
            color: #fff;
            box-shadow: 0 24px 64px rgba(0, 0, 0, .34);
        }

        .barcode-scanner-header {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            padding: 14px 16px;
            background: #0b1220;
        }

        .barcode-scanner-header strong {
            font-size: 16px;
            line-height: 22px;
        }

        .barcode-close-btn,
        .barcode-tool-btn {
            border: 0;
            border-radius: 8px;
            background: rgba(255, 255, 255, .12);
            color: #fff;
            font-size: 14px;
            line-height: 20px;
        }

        .barcode-close-btn {
            padding: 8px 12px;
        }

        .barcode-video-wrap {
            position: relative;
            width: 100%;
            overflow: hidden;
            background: #000;
        }

        .barcode-video-wrap video {
            display: block;
            width: 100%;
            height: min(68vh, 520px);
            object-fit: cover;
            background: #000;
        }

        .barcode-scan-frame {
            position: absolute;
            left: 50%;
            top: 50%;
            width: 88%;
            height: 142px;
            transform: translate(-50%, -50%);
            border: 2px solid #36d399;
            border-radius: 14px;
            box-shadow: 0 0 0 9999px rgba(0, 0, 0, .28);
            pointer-events: none;
        }

        .barcode-scan-line {
            position: absolute;
            left: 8%;
            right: 8%;
            top: 50%;
            height: 2px;
            background: #ff5a6a;
            transform: translateY(-50%);
            box-shadow: 0 0 12px rgba(255, 90, 106, .9);
            pointer-events: none;
        }

        .barcode-distance-tip {
            position: absolute;
            left: 50%;
            bottom: 16px;
            width: calc(100% - 28px);
            max-width: 470px;
            transform: translateX(-50%);
            padding: 10px 12px;
            border-radius: 10px;
            background: rgba(17, 24, 39, .72);
            color: #f9fafb;
            font-size: 13px;
            line-height: 1.55;
            text-align: center;
            pointer-events: none;
        }

        .barcode-scanner-tools {
            display: flex;
            align-items: center;
            justify-content: center;
            flex-wrap: wrap;
            gap: 10px;
            padding: 12px;
            border-top: 1px solid rgba(255, 255, 255, .08);
            background: #111827;
        }

        .barcode-tool-btn {
            padding: 8px 12px;
        }

        .barcode-zoom-box {
            display: flex;
            align-items: center;
            gap: 8px;
            min-width: 210px;
            padding: 7px 10px;
            border-radius: 999px;
            background: rgba(255, 255, 255, .1);
            color: #e5e7eb;
            font-size: 13px;
        }

        .barcode-zoom-box input {
            flex: 1;
        }

        .barcode-scanner-status {
            min-height: 44px;
            padding: 12px 16px 16px;
            background: #111827;
            color: #d1d5db;
            font-size: 14px;
            line-height: 1.55;
            text-align: center;
        }

        .barcode-scanner-status.is-ok {
            color: #86efac;
        }

        .barcode-scanner-status.is-error {
            color: #fca5a5;
        }

        .toast {
            position: fixed;
            left: 50%;
            bottom: calc(84px + env(safe-area-inset-bottom));
            z-index: 20;
            width: min(88vw, 420px);
            min-height: 46px;
            padding: 12px 14px;
            border-radius: 8px;
            background: rgba(23, 33, 43, .94);
            color: #fff;
            font-size: 14px;
            line-height: 1.55;
            text-align: center;
            transform: translate(-50%, 18px);
            opacity: 0;
            pointer-events: none;
            transition: opacity .2s ease, transform .2s ease;
        }

        .toast.is-visible {
            opacity: 1;
            transform: translate(-50%, 0);
        }

        .success-panel {
            display: none;
            padding: 24px 18px;
            text-align: center;
        }

        .success-panel.is-visible {
            display: block;
        }

        .success-seal {
            width: 58px;
            height: 58px;
            margin: 0 auto 14px;
            border-radius: 50%;
            background: #e7f6f2;
            display: grid;
            place-items: center;
        }

        .success-seal::before {
            content: "";
            width: 26px;
            height: 14px;
            border-left: 4px solid var(--accent);
            border-bottom: 4px solid var(--accent);
            transform: rotate(-45deg) translate(2px, -2px);
        }

        .success-panel h2 {
            margin: 0 0 8px;
            font-size: 22px;
            line-height: 1.3;
        }

        .success-panel p {
            margin: 0;
            color: var(--muted);
            font-size: 14px;
            line-height: 1.6;
        }

        @media (min-width: 680px) {
            .hero {
                border-bottom-left-radius: 24px;
                border-bottom-right-radius: 24px;
            }

            .hero-title {
                font-size: 38px;
            }

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

        @media (max-width: 430px) {
            .barcode-scanner-layer {
                padding-left: 10px;
                padding-right: 10px;
            }

            .barcode-video-wrap video {
                height: 66vh;
            }

            .barcode-scan-frame {
                width: 90%;
                height: 128px;
            }
        }