{"id":32,"date":"2026-09-27T08:17:02","date_gmt":"2026-09-27T08:17:02","guid":{"rendered":"https:\/\/bsolution.me\/zh\/paint-calculator-4\/"},"modified":"2026-09-27T09:00:13","modified_gmt":"2026-09-27T09:00:13","slug":"paint-calculator-2","status":"publish","type":"page","link":"https:\/\/bsolution.me\/zh\/paint-calculator-2\/","title":{"rendered":"\ud83c\udfa8 \u9ad8\u7ea7\u6d82\u6599\u8ba1\u7b97\u5668"},"content":{"rendered":"\n\n<style>\n\/* Perfected Futuristic Design System by Bsolution *\/\n@import url('https:\/\/fonts.googleapis.com\/css2?family=Heebo:wght@300;400;500;700;800&display=swap');\n\n:root {\n    --f-bg: #F5F5F7;\n    --f-card: rgba(255, 255, 255, 0.85);\n    --f-text: #1d1d1f;\n    --f-muted: #86868b;\n    --f-accent: #0066cc;\n    --f-border: rgba(0, 0, 0, 0.08);\n    --f-shadow: 0 8px 30px rgba(0,0,0,0.04);\n}\n\n.dark-theme {\n    --f-bg: #000000;\n    --f-card: rgba(28, 28, 30, 0.85);\n    --f-text: #f5f5f7;\n    --f-muted: #86868b;\n    --f-accent: #2997ff;\n    --f-border: rgba(255, 255, 255, 0.12);\n    --f-shadow: 0 8px 40px rgba(0,0,0,0.6);\n}\n\n.futur-layout {\n    max-width: 900px;\n    margin: 0 auto;\n    padding: 60px 20px;\n    font-family: 'Heebo', -apple-system, system-ui, sans-serif;\n    direction: ltr;\n    color: var(--f-text);\n    background-color: transparent;\n    transition: color 0.3s ease;\n}\n\n\/* Global Background override when tool is active *\/\nbody.tool-active {\n    background-color: var(--f-bg) !important;\n}\n\n.futur-glass-card {\n    background: var(--f-card);\n    backdrop-filter: saturate(180%) blur(20px);\n    -webkit-backdrop-filter: saturate(180%) blur(20px);\n    border: 1px solid var(--f-border);\n    border-radius: 22px;\n    padding: 40px;\n    box-shadow: var(--f-shadow);\n    margin-bottom: 40px;\n}\n\n.futur-layout h1.wp-block-heading {\n    font-size: clamp(2.5rem, 5vw, 3.5rem);\n    font-weight: 800;\n    color: var(--f-text);\n    margin-bottom: 12px;\n    letter-spacing: -0.02em;\n    text-align: center;\n}\n\n.futur-layout .tool-card {\n    width: 80%;\n    margin: 0 auto 40px auto;\n}\n@media (max-width: 900px) {\n    .futur-layout .tool-card { width: 100%; }\n}\n\n.futur-layout header {\n    display: flex;\n    flex-direction: column;\n    align-items: center;\n    text-align: center;\n    gap: 12px;\n    margin-bottom: 34px;\n    max-width: 800px;\n    margin-left: auto;\n    margin-right: auto;\n}\n.futur-layout header h1, \n.futur-layout header h2.main-title,\n.futur-layout header .title-wrap .main-title {\n    margin: 0;\n    font-size: clamp(2rem, 4vw, 2.7rem);\n    font-weight: 800;\n    letter-spacing: -0.02em;\n    display: flex;\n    align-items: center;\n    justify-content: center;\n    gap: 10px;\n    color: var(--f-text);\n}\n.futur-layout header h2.main-title span.icon { font-size: 1.25em; }\n.futur-layout header .subtitle,\n.futur-layout header p.subtitle {\n    margin: 0;\n    font-size: 1.05rem;\n    color: var(--f-muted);\n    line-height: 1.6;\n}\n.futur-layout header .badge-local,\n.futur-layout header .free-badge {\n    display: inline-flex;\n    align-items: center;\n    gap: 6px;\n    font-size: 0.78rem;\n    padding: 6px 14px;\n    border-radius: 999px;\n    border: 1px solid var(--f-border);\n    background: var(--f-card);\n    color: var(--f-text);\n    box-shadow: 0 4px 10px rgba(0,0,0,0.02);\n}\n.futur-layout header .badge-dot,\n.futur-layout header .free-dot {\n    width: 8px;\n    height: 8px;\n    border-radius: 999px;\n    background: #22c55e;\n    box-shadow: 0 0 0 4px rgba(34, 197, 94, 0.25);\n}\n\n.futur-layout .page-hook {\n    font-size: 1.25rem;\n    color: var(--f-muted);\n    text-align: center;\n    margin-bottom: 50px;\n    max-width: 700px;\n    margin-left: auto;\n    margin-right: auto;\n}\n\n.futur-layout h2.wp-block-heading {\n    font-size: 1.7rem;\n    font-weight: 700;\n    margin: 40px 0 20px;\n}\n\n.futur-layout p {\n    font-size: 1.15rem;\n    color: var(--f-text);\n    opacity: 0.9;\n    margin-bottom: 24px;\n    line-height: 1.7;\n}\n\n\/* Theme Toggle Button *\/\n.theme-toggle-wrap {\n    display: flex;\n    justify-content: flex-end;\n    margin-bottom: 20px;\n}\n.theme-btn {\n    background: var(--f-card);\n    border: 1px solid var(--f-border);\n    color: var(--f-text);\n    padding: 8px 16px;\n    border-radius: 999px;\n    cursor: pointer;\n    font-size: 0.9rem;\n    font-weight: 600;\n    display: flex;\n    align-items: center;\n    gap: 8px;\n    box-shadow: var(--f-shadow);\n}\n\n\/* Input & Button Styles for Tools *\/\n.futur-input {\n    width: 100%;\n    padding: 12px 16px;\n    border-radius: 12px;\n    border: 1px solid var(--f-border);\n    background: rgba(0,0,0,0.03);\n    color: var(--f-text);\n    font-size: 1rem;\n    margin-bottom: 16px;\n    transition: all 0.2s ease;\n}\n.dark-theme .futur-input { background: rgba(255,255,255,0.05); }\n\n.futur-btn {\n    background: var(--f-accent);\n    color: #fff;\n    border: none;\n    padding: 14px 28px;\n    border-radius: 12px;\n    font-weight: 700;\n    font-size: 1.1rem;\n    cursor: pointer;\n    transition: transform 0.2s ease;\n}\n.futur-btn:hover { transform: scale(1.02); }\n\n@media (max-width: 600px) {\n    .futur-layout { padding: 40px 16px; }\n    .futur-glass-card { padding: 24px; }\n}\n<\/style>\n<script>\n(function() {\n    var applyTheme = function(theme) {\n        if (theme === 'dark') {\n            document.documentElement.classList.add('dark-theme');\n        } else {\n            document.documentElement.classList.remove('dark-theme');\n        }\n        localStorage.setItem('bsolution-theme', theme);\n    };\n    \n    \/\/ Apply saved theme immediately\n    document.body.classList.add('tool-active');\n    var saved = localStorage.getItem('bsolution-theme') || 'light';\n    applyTheme(saved);\n    \n    \/\/ Bind theme toggle button (with retry since it may not exist yet)\n    function bindToggle() {\n        var btn = document.getElementById('globalThemeToggle');\n        if (!btn) { setTimeout(bindToggle, 100); return; }\n        if (btn.dataset.bound) return;\n        btn.dataset.bound = '1';\n        btn.addEventListener('click', function() {\n            var isDark = document.documentElement.classList.contains('dark-theme');\n            applyTheme(isDark ? 'light' : 'dark');\n        });\n    }\n    bindToggle();\n})();\n<\/script>\n\n<div class=\"futur-layout\">\n<div class=\"theme-toggle-wrap\"><button class=\"theme-btn\" id=\"globalThemeToggle\">\ud83c\udf19 \u9ed1\u6697\u6a21\u5f0f<\/button><\/div>\n\n\n\n<header>\n<h2 class=\"main-title\">\u9ad8\u7ea7\u6d82\u6599\u8ba1\u7b97\u5668 <span class=\"icon pill\">\ud83c\udfa8<\/span><\/h2>\n<p class=\"subtitle\">\u8f7b\u677e\u8ba1\u7b97\u60a8\u7684\u9879\u76ee\u6240\u9700\u7684\u6d82\u6599\u91cf\u3002<\/p>\n<div class=\"free-badge\"><span class=\"free-dot\"><\/span> \u5b8c\u5168\u514d\u8d39<\/div>\n<\/header>\n\n\n\n<div class=\"futur-glass-card tool-card\">\n<div id=\"bnet-tool-paint-calculator\">\n<style>\n    \/* CSS Variables: Light Mode *\/\n    #bnet-tool-paint-calculator {\n      --bg-color: transparent;\n      --text-color: #333333;\n      --border-color: #e5e5e5;\n      --accent-color: #0066cc;\n      --secondary-bg: #f8f9fa;\n      --danger-color: #dc3545;\n      --radius: 12px;\n      font-family: 'Heebo', sans-serif;\n      direction: ltr;\n      color: var(--text-color);\n      max-width: 100%;\n      box-sizing: border-box;\n    }\n    \n    \/* CSS Variables: Dark Mode *\/\n    .dark-theme #bnet-tool-paint-calculator {\n      --text-color: #f5f5f5;\n      --border-color: #444444;\n      --accent-color: #2997ff;\n      --secondary-bg: #1a1a1a;\n    }\n\n    #bnet-tool-paint-calculator * {\n      box-sizing: border-box;\n    }\n\n    \/* Styles scoped only to this tool *\/\n    #bnet-tool-paint-calculator .calculator-container {\n      display: flex;\n      flex-direction: column;\n      gap: 20px;\n    }\n\n    #bnet-tool-paint-calculator .section-title {\n      font-size: 1.1rem;\n      font-weight: bold;\n      margin-bottom: 10px;\n      color: var(--text-color);\n    }\n    \n    #bnet-tool-paint-calculator .section-subtitle {\n      font-size: 0.9rem;\n      color: #666;\n      margin-bottom: 15px;\n    }\n\n    .dark-theme #bnet-tool-paint-calculator .section-subtitle {\n      color: #aaa;\n    }\n\n    #bnet-tool-paint-calculator .input-group {\n      display: flex;\n      flex-direction: column;\n      gap: 6px;\n      margin-bottom: 15px;\n    }\n\n    #bnet-tool-paint-calculator label {\n      font-size: 0.9rem;\n      font-weight: 600;\n    }\n\n    #bnet-tool-paint-calculator select, \n    #bnet-tool-paint-calculator input[type=\"number\"],\n    #bnet-tool-paint-calculator input[type=\"text\"] {\n      width: 100%;\n      padding: 10px 14px;\n      border: 1px solid var(--border-color);\n      border-radius: 8px;\n      background: var(--secondary-bg);\n      color: var(--text-color);\n      font-family: inherit;\n      font-size: 1rem;\n    }\n    \n    #bnet-tool-paint-calculator select:focus, \n    #bnet-tool-paint-calculator input:focus {\n      outline: none;\n      border-color: var(--accent-color);\n      box-shadow: 0 0 0 2px rgba(0, 102, 204, 0.2);\n    }\n    \n    .dark-theme #bnet-tool-paint-calculator select:focus, \n    .dark-theme #bnet-tool-paint-calculator input:focus {\n      box-shadow: 0 0 0 2px rgba(41, 151, 255, 0.2);\n    }\n\n    #bnet-tool-paint-calculator details {\n      background: var(--secondary-bg);\n      border: 1px solid var(--border-color);\n      border-radius: var(--radius);\n      padding: 15px;\n      margin-bottom: 20px;\n    }\n    \n    #bnet-tool-paint-calculator summary {\n      font-weight: bold;\n      cursor: pointer;\n      user-select: none;\n      outline: none;\n    }\n\n    #bnet-tool-paint-calculator .chips {\n      display: flex;\n      flex-wrap: wrap;\n      gap: 8px;\n    }\n\n    #bnet-tool-paint-calculator .chip {\n      background: var(--secondary-bg);\n      border: 1px solid var(--border-color);\n      color: var(--text-color);\n      padding: 8px 12px;\n      border-radius: 20px;\n      cursor: pointer;\n      font-size: 0.9rem;\n      transition: all 0.2s ease;\n    }\n\n    #bnet-tool-paint-calculator .chip.active {\n      background: var(--accent-color);\n      color: #fff;\n      border-color: var(--accent-color);\n    }\n\n    #bnet-tool-paint-calculator .areas-list {\n      display: flex;\n      flex-direction: column;\n      gap: 10px;\n    }\n\n    #bnet-tool-paint-calculator .area-row {\n      display: flex;\n      flex-wrap: wrap;\n      gap: 10px;\n      align-items: center;\n      background: var(--bg-color);\n      padding: 10px;\n      border-radius: var(--radius);\n      border: 1px solid var(--border-color);\n    }\n\n    #bnet-tool-paint-calculator .area-row > div {\n      flex: 1;\n      min-width: 120px;\n    }\n\n    #bnet-tool-paint-calculator .btn {\n      padding: 10px 16px;\n      border: none;\n      border-radius: 8px;\n      font-weight: bold;\n      cursor: pointer;\n      font-family: inherit;\n      transition: background 0.2s ease;\n    }\n\n    #bnet-tool-paint-calculator .btn-primary {\n      background: var(--accent-color);\n      color: #fff;\n      width: 100%;\n      font-size: 1.1rem;\n      padding: 14px;\n      margin-top: 10px;\n    }\n\n    #bnet-tool-paint-calculator .btn-danger {\n      background: rgba(220, 53, 69, 0.1);\n      color: var(--danger-color);\n      border: 1px solid rgba(220, 53, 69, 0.3);\n      padding: 8px 12px;\n    }\n\n    #bnet-tool-paint-calculator .btn-secondary {\n      background: var(--secondary-bg);\n      color: var(--text-color);\n      border: 1px solid var(--border-color);\n    }\n    \n    #bnet-tool-paint-calculator .btn-secondary:hover {\n      background: rgba(0, 0, 0, 0.05);\n    }\n    \n    .dark-theme #bnet-tool-paint-calculator .btn-secondary:hover {\n      background: rgba(255, 255, 255, 0.05);\n    }\n\n    #bnet-tool-paint-calculator .result-panel {\n      background: rgba(0, 102, 204, 0.05);\n      border: 1px dashed var(--accent-color);\n      border-radius: var(--radius);\n      padding: 20px;\n      text-align: center;\n      margin-top: 20px;\n    }\n\n    .dark-theme #bnet-tool-paint-calculator .result-panel {\n      background: rgba(41, 151, 255, 0.1);\n    }\n\n    #bnet-tool-paint-calculator .result-value {\n      font-size: 2.5rem;\n      font-weight: 900;\n      color: var(--accent-color);\n      margin: 10px 0;\n    }\n\n    #bnet-tool-paint-calculator .result-unit {\n      font-size: 1.2rem;\n      font-weight: normal;\n    }\n\n    #bnet-tool-paint-calculator .result-details {\n      font-size: 0.9rem;\n      color: var(--text-color);\n      background: var(--secondary-bg);\n      padding: 10px;\n      border-radius: 8px;\n      margin-top: 15px;\n      text-align: left;\n      line-height: 1.6;\n    }\n\n    #bnet-tool-paint-calculator .error-msg {\n      color: var(--danger-color);\n      font-size: 0.85rem;\n      margin-top: 5px;\n      display: none;\n    }\n    \n    #bnet-tool-paint-calculator .buttons-row {\n      display: flex;\n      gap: 10px;\n      margin-bottom: 15px;\n    }\n    \n    @media (max-width: 600px) {\n      #bnet-tool-paint-calculator .area-row {\n        flex-direction: column;\n        align-items: stretch;\n      }\n      #bnet-tool-paint-calculator .area-row > div {\n        width: 100%;\n      }\n    }\n  <\/style>\n<div class=\"calculator-container\">\n<div>\n<div class=\"section-title\">\ud83e\uddee \u57fa\u672c\u8bbe\u7f6e<\/div>\n<p class=\"section-subtitle\">\u6b64\u5904\u7684\u8bbe\u7f6e\u9002\u7528\u4e8e\u60a8\u5728\u4e0b\u65b9\u8f93\u5165\u7684\u6240\u6709\u533a\u57df\u3002\u5982\u679c\u533a\u57df\u6027\u8d28\u4e0d\u540c\uff0c\u5efa\u8bae\u5206\u5f00\u8ba1\u7b97\u3002<\/p>\n<div class=\"input-group\">\n<label for=\"paint-surface\">\u8868\u9762\u7c7b\u578b<\/label>\n<select id=\"paint-surface\">\n<option selected=\"\" value=\"wall_interior\">\u5185\u5899\/\u5929\u82b1\u677f (\u77f3\u818f\/\u6df7\u51dd\u571f)<\/option>\n<option value=\"wall_exterior\">\u7c97\u7cd9\u5916\u5899<\/option>\n<option value=\"deck_wood\">\u7532\u677f\/\u5ba4\u5916\u6728\u8868\u9762<\/option>\n<option value=\"furniture_wood\">\u6a71\u67dc\/\u6728\u5236\u5bb6\u5177<\/option>\n<option value=\"metal\">\u91d1\u5c5e\u8868\u9762<\/option>\n<option value=\"floor_epoxy\">\u5730\u677f (\u5730\u677f\u6f06\/\u73af\u6c27\u6811\u8102)<\/option>\n<\/select>\n<\/div>\n<div class=\"input-group\">\n<label for=\"paint-type\">\u6d82\u6599\u7c7b\u578b<\/label>\n<select id=\"paint-type\">\n<option selected=\"\" value=\"water_wall\">\u6c34\u6027\u6f06\/\u5899\u9762\u4e19\u70ef\u9178\u6d82\u6599<\/option>\n<option value=\"oil_wall\">\u6cb9\u6027\u6f06<\/option>\n<option value=\"wood_water\">\u6728\u7528 \u6c34\u6027\u6f06\/\u6e05\u6f06<\/option>\n<option value=\"wood_oil\">\u6728\u7528 \u6cb9\u6027\u6f06\/\u6e05\u6f06<\/option>\n<option value=\"metal_enamel\">\u74f7\u6f06\/\u91d1\u5c5e\u6f06<\/option>\n<option value=\"epoxy\">\u53cc\u7ec4\u5206\u73af\u6c27\u6811\u8102<\/option>\n<option value=\"spray_can\">\u55b7\u6f06 (\u7f50\u88c5)<\/option>\n<\/select>\n<\/div>\n<div class=\"input-group\">\n<label for=\"paint-coats\">\u8ba1\u5212\u6d82\u5c42\u6570<\/label>\n<input id=\"paint-coats\" inputmode=\"numeric\" min=\"1\" step=\"1\" type=\"number\" value=\"2\"\/>\n<div class=\"error-msg\" id=\"coats-err\">\u8bf7\u8f93\u5165\u6709\u6548\u7684\u6d82\u5c42\u6570\uff081\u6216\u4ee5\u4e0a\uff09\u3002<\/div>\n<\/div>\n<\/div>\n<details>\n<summary>\u2699\ufe0f \u9ad8\u7ea7\u8bbe\u7f6e<\/summary>\n<div style=\"margin-top: 15px;\">\n<div class=\"input-group\">\n<label for=\"paint-safety\">\u5b89\u5168\u4f59\u91cf (%)<\/label>\n<input id=\"paint-safety\" inputmode=\"numeric\" min=\"0\" step=\"1\" type=\"number\" value=\"12\"\/>\n<p style=\"margin: 5px 0 0; font-size: 0.8rem; color: #666;\">\u5efa\u8bae\u4fdd\u7559\u635f\u8017\u7528\u4e8e\u4fee\u8865 (10%-15%)\u3002<\/p>\n<\/div>\n<div class=\"input-group\">\n<label>\u5438\u6536\u7387\/\u8868\u9762\u7eb9\u7406<\/label>\n<div class=\"chips\" id=\"texture-chips\">\n<button class=\"chip active\" data-val=\"smooth\" type=\"button\">\u5149\u6ed1\/\u4e0d\u5438\u6536<\/button>\n<button class=\"chip\" data-val=\"normal\" type=\"button\">\u666e\u901a<\/button>\n<button class=\"chip\" data-val=\"rough\" type=\"button\">\u7c97\u7cd9\/\u5438\u6536<\/button>\n<\/div>\n<\/div>\n<div class=\"input-group\">\n<label>\u6d82\u88c5\u65b9\u6cd5<\/label>\n<div class=\"chips\" id=\"method-chips\">\n<button class=\"chip active\" data-val=\"roller\" type=\"button\">\u6eda\u7b52<\/button>\n<button class=\"chip\" data-val=\"brush\" type=\"button\">\u5237\u5b50<\/button>\n<button class=\"chip\" data-val=\"spray_gun\" type=\"button\">\u55b7\u6d82 (\u55b7\u67aa)<\/button>\n<button class=\"chip\" data-val=\"spray_can\" type=\"button\">\u7f50\u88c5\u55b7\u6f06<\/button>\n<\/div>\n<\/div>\n<\/div>\n<\/details>\n<div>\n<div class=\"section-title\">\ud83d\udcd0 \u8ba1\u7b97\u533a\u57df<\/div>\n<p class=\"section-subtitle\">\u4ee5\u5e73\u65b9\u7c73\u4e3a\u5355\u4f4d\u8f93\u5165\u6240\u6709\u5f85\u6d82\u88c5\u533a\u57df\u3002\u60a8\u53ef\u4ee5\u6dfb\u52a0\u4e0d\u540c\u7684\u5899\u58c1\u548c\u623f\u95f4\u3002<\/p>\n<div class=\"buttons-row\">\n<button class=\"btn btn-secondary\" id=\"add-area-btn\" type=\"button\">\u2795 \u6dfb\u52a0\u533a\u57df<\/button>\n<button class=\"btn btn-secondary\" id=\"clear-areas-btn\" type=\"button\">\ud83d\uddd1\ufe0f \u5168\u90e8\u6e05\u9664<\/button>\n<\/div>\n<div class=\"areas-list\" id=\"areas-list\">\n<\/div>\n<div class=\"error-msg\" id=\"areas-err\">\u8bf7\u8f93\u5165\u81f3\u5c11\u4e00\u4e2a\u6709\u6548\u7684\u533a\u57df\uff08\u5927\u4e8e 0 \u5e73\u65b9\u7c73\uff09\u3002<\/div>\n<\/div>\n<button class=\"btn btn-primary\" id=\"calc-btn\" type=\"button\">\u8ba1\u7b97\u6d82\u6599\u91cf<\/button>\n<div class=\"result-panel\" id=\"result-panel\" style=\"display: none;\">\n<div class=\"section-title\">\u4e3a\u60a8\u63a8\u8350\u7684\u6d82\u6599\u91cf\u662f\uff1a<\/div>\n<div class=\"result-value\">\n<span id=\"result-liters\">0.00<\/span>\n<span class=\"result-unit\">\u5347<\/span>\n<\/div>\n<p id=\"result-subtitle\" style=\"margin: 0;\">\u5305\u542b\u5b89\u5168\u4f59\u91cf\u3002<\/p>\n<div class=\"result-details\" id=\"result-details\">\n<\/div>\n<\/div>\n<\/div>\n<script>\n    document.addEventListener(\"DOMContentLoaded\", () => {\n      const container = document.getElementById(\"bnet-tool-paint-calculator\");\n      if (!container) return;\n      \n      \/\/ Elements\n      const surfaceEl = container.querySelector(\"#paint-surface\");\n      const paintEl = container.querySelector(\"#paint-type\");\n      const coatsEl = container.querySelector(\"#paint-coats\");\n      const safetyEl = container.querySelector(\"#paint-safety\");\n      const textureChipsBox = container.querySelector(\"#texture-chips\");\n      const methodChipsBox = container.querySelector(\"#method-chips\");\n      const areasList = container.querySelector(\"#areas-list\");\n      const addAreaBtn = container.querySelector(\"#add-area-btn\");\n      const clearAreasBtn = container.querySelector(\"#clear-areas-btn\");\n      const calcBtn = container.querySelector(\"#calc-btn\");\n      const resultPanel = container.querySelector(\"#result-panel\");\n      \n      let currentTexture = \"smooth\";\n      let currentMethod = \"roller\";\n\n      \/\/ Constants\n      const baseCoverage = {\n        water_wall: 11,\n        oil_wall: 13,\n        wood_water: 10,\n        wood_oil: 9,\n        metal_enamel: 11,\n        epoxy: 8,\n        spray_can: 2\n      };\n      \n      const surfaceFactor = {\n        wall_interior: 1.00,\n        wall_exterior: 0.80,\n        deck_wood: 0.75,\n        furniture_wood: 0.95,\n        metal: 1.00,\n        floor_epoxy: 0.85\n      };\n      \n      const textureFactor = { smooth: 1.00, normal: 0.90, rough: 0.75 };\n      const methodFactor = { roller: 1.00, brush: 0.90, spray_gun: 0.80, spray_can: 0.70 };\n\n      \/\/ Helper for chips\n      function bindChips(box, onChange) {\n        box.addEventListener(\"click\", (e) => {\n          const btn = e.target.closest(\".chip\");\n          if (!btn) return;\n          box.querySelectorAll(\".chip\").forEach(b => b.classList.remove(\"active\"));\n          btn.classList.add(\"active\");\n          onChange(btn.getAttribute(\"data-val\"));\n        });\n      }\n\n      bindChips(textureChipsBox, val => currentTexture = val);\n      bindChips(methodChipsBox, val => currentMethod = val);\n\n      \/\/ Areas Management\n      function createAreaRow(name = \"\", area = \"\") {\n        const row = document.createElement(\"div\");\n        row.className = \"area-row\";\n        row.innerHTML = `\n          <div class=\"input-group\" style=\"margin: 0;\">\n            <label>\u533a\u57df\u540d\u79f0\uff08\u53ef\u9009\uff09<\/label>\n            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litersRounded = Math.ceil(litersWithSafety * 100) \/ 100;\n\n        \/\/ Display\n        container.querySelector(\"#result-liters\").textContent = litersRounded.toFixed(2);\n        \n        const surfaceText = surfaceEl.options[surfaceEl.selectedIndex].text;\n        const paintText = paintEl.options[paintEl.selectedIndex].text;\n        \n        container.querySelector(\"#result-details\").innerHTML = `\n          <strong>\u8ba1\u7b97\u8be6\u60c5\uff1a<\/strong><br>\n          \u603b\u9762\u79ef\uff1a<strong>${totalArea.toFixed(1)} \u5e73\u65b9\u7c73<\/strong><br>\n          \u6d82\u5c42\u6570\uff1a<strong>${coats}<\/strong><br>\n          \u8868\u9762\u7c7b\u578b\uff1a<strong>${surfaceText}<\/strong><br>\n          \u6d82\u6599\u7c7b\u578b\uff1a<strong>${paintText}<\/strong><br>\n          \u9884\u4f30\u57fa\u7840\u8986\u76d6\u7387\uff1a<strong>${cov.toFixed(1)} \u5e73\u65b9\u7c73\/\u5347<\/strong><br>\n          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